react-native-webview.git

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  1. /**
  2. * Copyright (c) 2015-present, Facebook, Inc.
  3. *
  4. * This source code is licensed under the MIT license found in the
  5. * LICENSE file in the root directory of this source tree.
  6. */
  7. #import "RNCWKWebView.h"
  8. #import <React/RCTConvert.h>
  9. #import <React/RCTAutoInsetsProtocol.h>
  10. #import "RNCWKProcessPoolManager.h"
  11. #import <UIKit/UIKit.h>
  12. #import "objc/runtime.h"
  13. static NSTimer *keyboardTimer;
  14. static NSString *const MessageHandlerName = @"ReactNativeWebView";
  15. static NSURLCredential* clientAuthenticationCredential;
  16. // runtime trick to remove WKWebView keyboard default toolbar
  17. // see: http://stackoverflow.com/questions/19033292/ios-7-uiwebview-keyboard-issue/19042279#19042279
  18. @interface _SwizzleHelperWK : NSObject @end
  19. @implementation _SwizzleHelperWK
  20. -(id)inputAccessoryView
  21. {
  22. return nil;
  23. }
  24. @end
  25. @interface RNCWKWebView () <WKUIDelegate, WKNavigationDelegate, WKScriptMessageHandler, UIScrollViewDelegate, RCTAutoInsetsProtocol>
  26. @property (nonatomic, copy) RCTDirectEventBlock onLoadingStart;
  27. @property (nonatomic, copy) RCTDirectEventBlock onLoadingFinish;
  28. @property (nonatomic, copy) RCTDirectEventBlock onLoadingError;
  29. @property (nonatomic, copy) RCTDirectEventBlock onLoadingProgress;
  30. @property (nonatomic, copy) RCTDirectEventBlock onShouldStartLoadWithRequest;
  31. @property (nonatomic, copy) RCTDirectEventBlock onMessage;
  32. @property (nonatomic, copy) RCTDirectEventBlock onScroll;
  33. @property (nonatomic, copy) WKWebView *webView;
  34. @end
  35. @implementation RNCWKWebView
  36. {
  37. UIColor * _savedBackgroundColor;
  38. BOOL _savedHideKeyboardAccessoryView;
  39. BOOL _savedKeyboardDisplayRequiresUserAction;
  40. // Workaround for StatusBar appearance bug for iOS 12
  41. // https://github.com/react-native-community/react-native-webview/issues/62
  42. BOOL _isFullScreenVideoOpen;
  43. UIStatusBarStyle _savedStatusBarStyle;
  44. BOOL _savedStatusBarHidden;
  45. }
  46. - (instancetype)initWithFrame:(CGRect)frame
  47. {
  48. if ((self = [super initWithFrame:frame])) {
  49. super.backgroundColor = [UIColor clearColor];
  50. _bounces = YES;
  51. _scrollEnabled = YES;
  52. _showsHorizontalScrollIndicator = YES;
  53. _showsVerticalScrollIndicator = YES;
  54. _directionalLockEnabled = YES;
  55. _automaticallyAdjustContentInsets = YES;
  56. _contentInset = UIEdgeInsetsZero;
  57. _savedKeyboardDisplayRequiresUserAction = YES;
  58. _savedStatusBarStyle = RCTSharedApplication().statusBarStyle;
  59. _savedStatusBarHidden = RCTSharedApplication().statusBarHidden;
  60. }
  61. if (@available(iOS 12.0, *)) {
  62. // Workaround for a keyboard dismissal bug present in iOS 12
  63. // https://openradar.appspot.com/radar?id=5018321736957952
  64. [[NSNotificationCenter defaultCenter]
  65. addObserver:self
  66. selector:@selector(keyboardWillHide)
  67. name:UIKeyboardWillHideNotification object:nil];
  68. [[NSNotificationCenter defaultCenter]
  69. addObserver:self
  70. selector:@selector(keyboardWillShow)
  71. name:UIKeyboardWillShowNotification object:nil];
  72. // Workaround for StatusBar appearance bug for iOS 12
  73. // https://github.com/react-native-community/react-native-webview/issues/62
  74. [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(toggleFullScreenVideoStatusBars) name:@"_MRMediaRemotePlayerSupportedCommandsDidChangeNotification" object:nil];
  75. }
  76. return self;
  77. }
  78. - (void)dealloc
  79. {
  80. [[NSNotificationCenter defaultCenter] removeObserver:self];
  81. }
  82. /**
  83. * See https://stackoverflow.com/questions/25713069/why-is-wkwebview-not-opening-links-with-target-blank/25853806#25853806 for details.
  84. */
  85. - (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures
  86. {
  87. if (!navigationAction.targetFrame.isMainFrame) {
  88. [webView loadRequest:navigationAction.request];
  89. }
  90. return nil;
  91. }
  92. - (void)didMoveToWindow
  93. {
  94. if (self.window != nil && _webView == nil) {
  95. WKWebViewConfiguration *wkWebViewConfig = [WKWebViewConfiguration new];
  96. if (_incognito) {
  97. wkWebViewConfig.websiteDataStore = [WKWebsiteDataStore nonPersistentDataStore];
  98. } else if (_cacheEnabled) {
  99. wkWebViewConfig.websiteDataStore = [WKWebsiteDataStore defaultDataStore];
  100. }
  101. if(self.useSharedProcessPool) {
  102. wkWebViewConfig.processPool = [[RNCWKProcessPoolManager sharedManager] sharedProcessPool];
  103. }
  104. wkWebViewConfig.userContentController = [WKUserContentController new];
  105. if (_messagingEnabled) {
  106. [wkWebViewConfig.userContentController addScriptMessageHandler:self name:MessageHandlerName];
  107. NSString *source = [NSString stringWithFormat:
  108. @"window.%@ = {"
  109. " postMessage: function (data) {"
  110. " window.webkit.messageHandlers.%@.postMessage(String(data));"
  111. " }"
  112. "};", MessageHandlerName, MessageHandlerName
  113. ];
  114. WKUserScript *script = [[WKUserScript alloc] initWithSource:source injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:YES];
  115. [wkWebViewConfig.userContentController addUserScript:script];
  116. }
  117. wkWebViewConfig.allowsInlineMediaPlayback = _allowsInlineMediaPlayback;
  118. #if WEBKIT_IOS_10_APIS_AVAILABLE
  119. wkWebViewConfig.mediaTypesRequiringUserActionForPlayback = _mediaPlaybackRequiresUserAction
  120. ? WKAudiovisualMediaTypeAll
  121. : WKAudiovisualMediaTypeNone;
  122. wkWebViewConfig.dataDetectorTypes = _dataDetectorTypes;
  123. #else
  124. wkWebViewConfig.mediaPlaybackRequiresUserAction = _mediaPlaybackRequiresUserAction;
  125. #endif
  126. if (_applicationNameForUserAgent) {
  127. wkWebViewConfig.applicationNameForUserAgent = [NSString stringWithFormat:@"%@ %@", wkWebViewConfig.applicationNameForUserAgent, _applicationNameForUserAgent];
  128. }
  129. if(_sharedCookiesEnabled) {
  130. // More info to sending cookies with WKWebView
  131. // https://stackoverflow.com/questions/26573137/can-i-set-the-cookies-to-be-used-by-a-wkwebview/26577303#26577303
  132. if (@available(iOS 11.0, *)) {
  133. // Set Cookies in iOS 11 and above, initialize websiteDataStore before setting cookies
  134. // See also https://forums.developer.apple.com/thread/97194
  135. // check if websiteDataStore has not been initialized before
  136. if(!_incognito && !_cacheEnabled) {
  137. wkWebViewConfig.websiteDataStore = [WKWebsiteDataStore nonPersistentDataStore];
  138. }
  139. for (NSHTTPCookie *cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {
  140. [wkWebViewConfig.websiteDataStore.httpCookieStore setCookie:cookie completionHandler:nil];
  141. }
  142. } else {
  143. NSMutableString *script = [NSMutableString string];
  144. // Clear all existing cookies in a direct called function. This ensures that no
  145. // javascript error will break the web content javascript.
  146. // We keep this code here, if someone requires that Cookies are also removed within the
  147. // the WebView and want to extends the current sharedCookiesEnabled option with an
  148. // additional property.
  149. // Generates JS: document.cookie = "key=; Expires=Thu, 01 Jan 1970 00:00:01 GMT;"
  150. // for each cookie which is already available in the WebView context.
  151. /*
  152. [script appendString:@"(function () {\n"];
  153. [script appendString:@" var cookies = document.cookie.split('; ');\n"];
  154. [script appendString:@" for (var i = 0; i < cookies.length; i++) {\n"];
  155. [script appendString:@" if (cookies[i].indexOf('=') !== -1) {\n"];
  156. [script appendString:@" document.cookie = cookies[i].split('=')[0] + '=; Expires=Thu, 01 Jan 1970 00:00:01 GMT';\n"];
  157. [script appendString:@" }\n"];
  158. [script appendString:@" }\n"];
  159. [script appendString:@"})();\n\n"];
  160. */
  161. // Set cookies in a direct called function. This ensures that no
  162. // javascript error will break the web content javascript.
  163. // Generates JS: document.cookie = "key=value; Path=/; Expires=Thu, 01 Jan 20xx 00:00:01 GMT;"
  164. // for each cookie which is available in the application context.
  165. [script appendString:@"(function () {\n"];
  166. for (NSHTTPCookie *cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {
  167. [script appendFormat:@"document.cookie = %@ + '=' + %@",
  168. RCTJSONStringify(cookie.name, NULL),
  169. RCTJSONStringify(cookie.value, NULL)];
  170. if (cookie.path) {
  171. [script appendFormat:@" + '; Path=' + %@", RCTJSONStringify(cookie.path, NULL)];
  172. }
  173. if (cookie.expiresDate) {
  174. [script appendFormat:@" + '; Expires=' + new Date(%f).toUTCString()",
  175. cookie.expiresDate.timeIntervalSince1970 * 1000
  176. ];
  177. }
  178. [script appendString:@";\n"];
  179. }
  180. [script appendString:@"})();\n"];
  181. WKUserScript* cookieInScript = [[WKUserScript alloc] initWithSource:script
  182. injectionTime:WKUserScriptInjectionTimeAtDocumentStart
  183. forMainFrameOnly:YES];
  184. [wkWebViewConfig.userContentController addUserScript:cookieInScript];
  185. }
  186. }
  187. _webView = [[WKWebView alloc] initWithFrame:self.bounds configuration: wkWebViewConfig];
  188. _webView.scrollView.delegate = self;
  189. _webView.UIDelegate = self;
  190. _webView.navigationDelegate = self;
  191. _webView.scrollView.scrollEnabled = _scrollEnabled;
  192. _webView.scrollView.pagingEnabled = _pagingEnabled;
  193. _webView.scrollView.bounces = _bounces;
  194. _webView.scrollView.showsHorizontalScrollIndicator = _showsHorizontalScrollIndicator;
  195. _webView.scrollView.showsVerticalScrollIndicator = _showsVerticalScrollIndicator;
  196. _webView.scrollView.directionalLockEnabled = _directionalLockEnabled;
  197. _webView.allowsLinkPreview = _allowsLinkPreview;
  198. [_webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil];
  199. _webView.allowsBackForwardNavigationGestures = _allowsBackForwardNavigationGestures;
  200. if (_userAgent) {
  201. _webView.customUserAgent = _userAgent;
  202. }
  203. #if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000 /* __IPHONE_11_0 */
  204. if ([_webView.scrollView respondsToSelector:@selector(setContentInsetAdjustmentBehavior:)]) {
  205. _webView.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
  206. }
  207. #endif
  208. [self addSubview:_webView];
  209. [self setHideKeyboardAccessoryView: _savedHideKeyboardAccessoryView];
  210. [self setKeyboardDisplayRequiresUserAction: _savedKeyboardDisplayRequiresUserAction];
  211. [self visitSource];
  212. }
  213. }
  214. // Update webview property when the component prop changes.
  215. - (void)setAllowsBackForwardNavigationGestures:(BOOL)allowsBackForwardNavigationGestures {
  216. _allowsBackForwardNavigationGestures = allowsBackForwardNavigationGestures;
  217. _webView.allowsBackForwardNavigationGestures = _allowsBackForwardNavigationGestures;
  218. }
  219. - (void)removeFromSuperview
  220. {
  221. if (_webView) {
  222. [_webView.configuration.userContentController removeScriptMessageHandlerForName:MessageHandlerName];
  223. [_webView removeObserver:self forKeyPath:@"estimatedProgress"];
  224. [_webView removeFromSuperview];
  225. _webView.scrollView.delegate = nil;
  226. _webView = nil;
  227. }
  228. [super removeFromSuperview];
  229. }
  230. -(void)toggleFullScreenVideoStatusBars
  231. {
  232. #pragma clang diagnostic ignored "-Wdeprecated-declarations"
  233. if (!_isFullScreenVideoOpen) {
  234. _isFullScreenVideoOpen = YES;
  235. RCTUnsafeExecuteOnMainQueueSync(^{
  236. [RCTSharedApplication() setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];
  237. });
  238. } else {
  239. _isFullScreenVideoOpen = NO;
  240. RCTUnsafeExecuteOnMainQueueSync(^{
  241. [RCTSharedApplication() setStatusBarHidden:_savedStatusBarHidden animated:YES];
  242. [RCTSharedApplication() setStatusBarStyle:_savedStatusBarStyle animated:YES];
  243. });
  244. }
  245. #pragma clang diagnostic pop
  246. }
  247. -(void)keyboardWillHide
  248. {
  249. keyboardTimer = [NSTimer scheduledTimerWithTimeInterval:0 target:self selector:@selector(keyboardDisplacementFix) userInfo:nil repeats:false];
  250. [[NSRunLoop mainRunLoop] addTimer:keyboardTimer forMode:NSRunLoopCommonModes];
  251. }
  252. -(void)keyboardWillShow
  253. {
  254. if (keyboardTimer != nil) {
  255. [keyboardTimer invalidate];
  256. }
  257. }
  258. -(void)keyboardDisplacementFix
  259. {
  260. // Additional viewport checks to prevent unintentional scrolls
  261. UIScrollView *scrollView = self.webView.scrollView;
  262. double maxContentOffset = scrollView.contentSize.height - scrollView.frame.size.height;
  263. if (maxContentOffset < 0) {
  264. maxContentOffset = 0;
  265. }
  266. if (scrollView.contentOffset.y > maxContentOffset) {
  267. // https://stackoverflow.com/a/9637807/824966
  268. [UIView animateWithDuration:.25 animations:^{
  269. scrollView.contentOffset = CGPointMake(0, maxContentOffset);
  270. }];
  271. }
  272. }
  273. - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{
  274. if ([keyPath isEqual:@"estimatedProgress"] && object == self.webView) {
  275. if(_onLoadingProgress){
  276. NSMutableDictionary<NSString *, id> *event = [self baseEvent];
  277. [event addEntriesFromDictionary:@{@"progress":[NSNumber numberWithDouble:self.webView.estimatedProgress]}];
  278. _onLoadingProgress(event);
  279. }
  280. }else{
  281. [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
  282. }
  283. }
  284. - (void)setBackgroundColor:(UIColor *)backgroundColor
  285. {
  286. _savedBackgroundColor = backgroundColor;
  287. if (_webView == nil) {
  288. return;
  289. }
  290. CGFloat alpha = CGColorGetAlpha(backgroundColor.CGColor);
  291. self.opaque = _webView.opaque = (alpha == 1.0);
  292. _webView.scrollView.backgroundColor = backgroundColor;
  293. _webView.backgroundColor = backgroundColor;
  294. }
  295. /**
  296. * This method is called whenever JavaScript running within the web view calls:
  297. * - window.webkit.messageHandlers[MessageHandlerName].postMessage
  298. */
  299. - (void)userContentController:(WKUserContentController *)userContentController
  300. didReceiveScriptMessage:(WKScriptMessage *)message
  301. {
  302. if (_onMessage != nil) {
  303. NSMutableDictionary<NSString *, id> *event = [self baseEvent];
  304. [event addEntriesFromDictionary: @{@"data": message.body}];
  305. _onMessage(event);
  306. }
  307. }
  308. - (void)setSource:(NSDictionary *)source
  309. {
  310. if (![_source isEqualToDictionary:source]) {
  311. _source = [source copy];
  312. if (_webView != nil) {
  313. [self visitSource];
  314. }
  315. }
  316. }
  317. - (void)setContentInset:(UIEdgeInsets)contentInset
  318. {
  319. _contentInset = contentInset;
  320. [RCTView autoAdjustInsetsForView:self
  321. withScrollView:_webView.scrollView
  322. updateOffset:NO];
  323. }
  324. - (void)refreshContentInset
  325. {
  326. [RCTView autoAdjustInsetsForView:self
  327. withScrollView:_webView.scrollView
  328. updateOffset:YES];
  329. }
  330. - (void)visitSource
  331. {
  332. // Check for a static html source first
  333. NSString *html = [RCTConvert NSString:_source[@"html"]];
  334. if (html) {
  335. NSURL *baseURL = [RCTConvert NSURL:_source[@"baseUrl"]];
  336. if (!baseURL) {
  337. baseURL = [NSURL URLWithString:@"about:blank"];
  338. }
  339. [_webView loadHTMLString:html baseURL:baseURL];
  340. return;
  341. }
  342. NSURLRequest *request = [self requestForSource:_source];
  343. // Because of the way React works, as pages redirect, we actually end up
  344. // passing the redirect urls back here, so we ignore them if trying to load
  345. // the same url. We'll expose a call to 'reload' to allow a user to load
  346. // the existing page.
  347. if ([request.URL isEqual:_webView.URL]) {
  348. return;
  349. }
  350. if (!request.URL) {
  351. // Clear the webview
  352. [_webView loadHTMLString:@"" baseURL:nil];
  353. return;
  354. }
  355. if (request.URL.host) {
  356. [_webView loadRequest:request];
  357. }
  358. else {
  359. [_webView loadFileURL:request.URL allowingReadAccessToURL:request.URL];
  360. }
  361. }
  362. -(void)setKeyboardDisplayRequiresUserAction:(BOOL)keyboardDisplayRequiresUserAction
  363. {
  364. if (_webView == nil) {
  365. _savedKeyboardDisplayRequiresUserAction = keyboardDisplayRequiresUserAction;
  366. return;
  367. }
  368. if (_savedKeyboardDisplayRequiresUserAction == true) {
  369. return;
  370. }
  371. UIView* subview;
  372. for (UIView* view in _webView.scrollView.subviews) {
  373. if([[view.class description] hasPrefix:@"WK"])
  374. subview = view;
  375. }
  376. if(subview == nil) return;
  377. Class class = subview.class;
  378. NSOperatingSystemVersion iOS_11_3_0 = (NSOperatingSystemVersion){11, 3, 0};
  379. NSOperatingSystemVersion iOS_12_2_0 = (NSOperatingSystemVersion){12, 2, 0};
  380. Method method;
  381. IMP override;
  382. if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion: iOS_12_2_0]) {
  383. // iOS 12.2.0 - Future
  384. SEL selector = sel_getUid("_elementDidFocus:userIsInteracting:blurPreviousNode:changingActivityState:userObject:");
  385. method = class_getInstanceMethod(class, selector);
  386. IMP original = method_getImplementation(method);
  387. override = imp_implementationWithBlock(^void(id me, void* arg0, BOOL arg1, BOOL arg2, BOOL arg3, id arg4) {
  388. ((void (*)(id, SEL, void*, BOOL, BOOL, BOOL, id))original)(me, selector, arg0, TRUE, arg2, arg3, arg4);
  389. });
  390. }
  391. else if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion: iOS_11_3_0]) {
  392. // iOS 11.3.0 - 12.2.0
  393. SEL selector = sel_getUid("_startAssistingNode:userIsInteracting:blurPreviousNode:changingActivityState:userObject:");
  394. method = class_getInstanceMethod(class, selector);
  395. IMP original = method_getImplementation(method);
  396. override = imp_implementationWithBlock(^void(id me, void* arg0, BOOL arg1, BOOL arg2, BOOL arg3, id arg4) {
  397. ((void (*)(id, SEL, void*, BOOL, BOOL, BOOL, id))original)(me, selector, arg0, TRUE, arg2, arg3, arg4);
  398. });
  399. } else {
  400. // iOS 9.0 - 11.3.0
  401. SEL selector = sel_getUid("_startAssistingNode:userIsInteracting:blurPreviousNode:userObject:");
  402. method = class_getInstanceMethod(class, selector);
  403. IMP original = method_getImplementation(method);
  404. override = imp_implementationWithBlock(^void(id me, void* arg0, BOOL arg1, BOOL arg2, id arg3) {
  405. ((void (*)(id, SEL, void*, BOOL, BOOL, id))original)(me, selector, arg0, TRUE, arg2, arg3);
  406. });
  407. }
  408. method_setImplementation(method, override);
  409. }
  410. -(void)setHideKeyboardAccessoryView:(BOOL)hideKeyboardAccessoryView
  411. {
  412. if (_webView == nil) {
  413. _savedHideKeyboardAccessoryView = hideKeyboardAccessoryView;
  414. return;
  415. }
  416. if (_savedHideKeyboardAccessoryView == false) {
  417. return;
  418. }
  419. UIView* subview;
  420. for (UIView* view in _webView.scrollView.subviews) {
  421. if([[view.class description] hasPrefix:@"WK"])
  422. subview = view;
  423. }
  424. if(subview == nil) return;
  425. NSString* name = [NSString stringWithFormat:@"%@_SwizzleHelperWK", subview.class.superclass];
  426. Class newClass = NSClassFromString(name);
  427. if(newClass == nil)
  428. {
  429. newClass = objc_allocateClassPair(subview.class, [name cStringUsingEncoding:NSASCIIStringEncoding], 0);
  430. if(!newClass) return;
  431. Method method = class_getInstanceMethod([_SwizzleHelperWK class], @selector(inputAccessoryView));
  432. class_addMethod(newClass, @selector(inputAccessoryView), method_getImplementation(method), method_getTypeEncoding(method));
  433. objc_registerClassPair(newClass);
  434. }
  435. object_setClass(subview, newClass);
  436. }
  437. - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
  438. {
  439. scrollView.decelerationRate = _decelerationRate;
  440. }
  441. - (void)setScrollEnabled:(BOOL)scrollEnabled
  442. {
  443. _scrollEnabled = scrollEnabled;
  444. _webView.scrollView.scrollEnabled = scrollEnabled;
  445. }
  446. - (void)scrollViewDidScroll:(UIScrollView *)scrollView
  447. {
  448. // Don't allow scrolling the scrollView.
  449. if (!_scrollEnabled) {
  450. scrollView.bounds = _webView.bounds;
  451. }
  452. else if (_onScroll != nil) {
  453. NSDictionary *event = @{
  454. @"contentOffset": @{
  455. @"x": @(scrollView.contentOffset.x),
  456. @"y": @(scrollView.contentOffset.y)
  457. },
  458. @"contentInset": @{
  459. @"top": @(scrollView.contentInset.top),
  460. @"left": @(scrollView.contentInset.left),
  461. @"bottom": @(scrollView.contentInset.bottom),
  462. @"right": @(scrollView.contentInset.right)
  463. },
  464. @"contentSize": @{
  465. @"width": @(scrollView.contentSize.width),
  466. @"height": @(scrollView.contentSize.height)
  467. },
  468. @"layoutMeasurement": @{
  469. @"width": @(scrollView.frame.size.width),
  470. @"height": @(scrollView.frame.size.height)
  471. },
  472. @"zoomScale": @(scrollView.zoomScale ?: 1),
  473. };
  474. _onScroll(event);
  475. }
  476. }
  477. - (void)setDirectionalLockEnabled:(BOOL)directionalLockEnabled
  478. {
  479. _directionalLockEnabled = directionalLockEnabled;
  480. _webView.scrollView.directionalLockEnabled = directionalLockEnabled;
  481. }
  482. - (void)setShowsHorizontalScrollIndicator:(BOOL)showsHorizontalScrollIndicator
  483. {
  484. _showsHorizontalScrollIndicator = showsHorizontalScrollIndicator;
  485. _webView.scrollView.showsHorizontalScrollIndicator = showsHorizontalScrollIndicator;
  486. }
  487. - (void)setShowsVerticalScrollIndicator:(BOOL)showsVerticalScrollIndicator
  488. {
  489. _showsVerticalScrollIndicator = showsVerticalScrollIndicator;
  490. _webView.scrollView.showsVerticalScrollIndicator = showsVerticalScrollIndicator;
  491. }
  492. - (void)postMessage:(NSString *)message
  493. {
  494. NSDictionary *eventInitDict = @{@"data": message};
  495. NSString *source = [NSString
  496. stringWithFormat:@"window.dispatchEvent(new MessageEvent('message', %@));",
  497. RCTJSONStringify(eventInitDict, NULL)
  498. ];
  499. [self injectJavaScript: source];
  500. }
  501. - (void)layoutSubviews
  502. {
  503. [super layoutSubviews];
  504. // Ensure webview takes the position and dimensions of RNCWKWebView
  505. _webView.frame = self.bounds;
  506. _webView.scrollView.contentInset = _contentInset;
  507. }
  508. - (NSMutableDictionary<NSString *, id> *)baseEvent
  509. {
  510. NSDictionary *event = @{
  511. @"url": _webView.URL.absoluteString ?: @"",
  512. @"title": _webView.title ?: @"",
  513. @"loading" : @(_webView.loading),
  514. @"canGoBack": @(_webView.canGoBack),
  515. @"canGoForward" : @(_webView.canGoForward)
  516. };
  517. return [[NSMutableDictionary alloc] initWithDictionary: event];
  518. }
  519. + (void)setClientAuthenticationCredential:(nullable NSURLCredential*)credential {
  520. clientAuthenticationCredential = credential;
  521. }
  522. - (void) webView:(WKWebView *)webView
  523. didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
  524. completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential * _Nullable))completionHandler
  525. {
  526. if (!clientAuthenticationCredential) {
  527. completionHandler(NSURLSessionAuthChallengePerformDefaultHandling, nil);
  528. return;
  529. }
  530. if ([[challenge protectionSpace] authenticationMethod] == NSURLAuthenticationMethodClientCertificate) {
  531. completionHandler(NSURLSessionAuthChallengeUseCredential, clientAuthenticationCredential);
  532. } else {
  533. completionHandler(NSURLSessionAuthChallengePerformDefaultHandling, nil);
  534. }
  535. }
  536. #pragma mark - WKNavigationDelegate methods
  537. /**
  538. * alert
  539. */
  540. - (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler
  541. {
  542. UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:message preferredStyle:UIAlertControllerStyleAlert];
  543. [alert addAction:[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
  544. completionHandler();
  545. }]];
  546. [[self topViewController] presentViewController:alert animated:YES completion:NULL];
  547. }
  548. /**
  549. * confirm
  550. */
  551. - (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
  552. UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:message preferredStyle:UIAlertControllerStyleAlert];
  553. [alert addAction:[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
  554. completionHandler(YES);
  555. }]];
  556. [alert addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
  557. completionHandler(NO);
  558. }]];
  559. [[self topViewController] presentViewController:alert animated:YES completion:NULL];
  560. }
  561. /**
  562. * prompt
  563. */
  564. - (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString *))completionHandler{
  565. UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:prompt preferredStyle:UIAlertControllerStyleAlert];
  566. [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
  567. textField.textColor = [UIColor lightGrayColor];
  568. textField.placeholder = defaultText;
  569. }];
  570. [alert addAction:[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
  571. completionHandler([[alert.textFields lastObject] text]);
  572. }]];
  573. [[self topViewController] presentViewController:alert animated:YES completion:NULL];
  574. }
  575. /**
  576. * topViewController
  577. */
  578. -(UIViewController *)topViewController{
  579.    UIViewController *controller = [self topViewControllerWithRootViewController:[self getCurrentWindow].rootViewController];
  580.    return controller;
  581. }
  582. /**
  583. * topViewControllerWithRootViewController
  584. */
  585. -(UIViewController *)topViewControllerWithRootViewController:(UIViewController *)viewController{
  586. if (viewController==nil) return nil;
  587. if (viewController.presentedViewController!=nil) {
  588. return [self topViewControllerWithRootViewController:viewController.presentedViewController];
  589. } else if ([viewController isKindOfClass:[UITabBarController class]]){
  590. return [self topViewControllerWithRootViewController:[(UITabBarController *)viewController selectedViewController]];
  591. } else if ([viewController isKindOfClass:[UINavigationController class]]){
  592. return [self topViewControllerWithRootViewController:[(UINavigationController *)viewController visibleViewController]];
  593. } else {
  594. return viewController;
  595. }
  596. }
  597. /**
  598. * getCurrentWindow
  599. */
  600. -(UIWindow *)getCurrentWindow{
  601. UIWindow *window = [UIApplication sharedApplication].keyWindow;
  602. if (window.windowLevel!=UIWindowLevelNormal) {
  603. for (UIWindow *wid in [UIApplication sharedApplication].windows) {
  604. if (window.windowLevel==UIWindowLevelNormal) {
  605. window = wid;
  606. break;
  607. }
  608. }
  609. }
  610. return window;
  611. }
  612. /**
  613. * Decides whether to allow or cancel a navigation.
  614. * @see https://fburl.com/42r9fxob
  615. */
  616. - (void) webView:(WKWebView *)webView
  617. decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction
  618. decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
  619. {
  620. static NSDictionary<NSNumber *, NSString *> *navigationTypes;
  621. static dispatch_once_t onceToken;
  622. dispatch_once(&onceToken, ^{
  623. navigationTypes = @{
  624. @(WKNavigationTypeLinkActivated): @"click",
  625. @(WKNavigationTypeFormSubmitted): @"formsubmit",
  626. @(WKNavigationTypeBackForward): @"backforward",
  627. @(WKNavigationTypeReload): @"reload",
  628. @(WKNavigationTypeFormResubmitted): @"formresubmit",
  629. @(WKNavigationTypeOther): @"other",
  630. };
  631. });
  632. WKNavigationType navigationType = navigationAction.navigationType;
  633. NSURLRequest *request = navigationAction.request;
  634. if (_onShouldStartLoadWithRequest) {
  635. NSMutableDictionary<NSString *, id> *event = [self baseEvent];
  636. [event addEntriesFromDictionary: @{
  637. @"url": (request.URL).absoluteString,
  638. @"navigationType": navigationTypes[@(navigationType)]
  639. }];
  640. if (![self.delegate webView:self
  641. shouldStartLoadForRequest:event
  642. withCallback:_onShouldStartLoadWithRequest]) {
  643. decisionHandler(WKNavigationResponsePolicyCancel);
  644. return;
  645. }
  646. }
  647. if (_onLoadingStart) {
  648. // We have this check to filter out iframe requests and whatnot
  649. BOOL isTopFrame = [request.URL isEqual:request.mainDocumentURL];
  650. if (isTopFrame) {
  651. NSMutableDictionary<NSString *, id> *event = [self baseEvent];
  652. [event addEntriesFromDictionary: @{
  653. @"url": (request.URL).absoluteString,
  654. @"navigationType": navigationTypes[@(navigationType)]
  655. }];
  656. _onLoadingStart(event);
  657. }
  658. }
  659. // Allow all navigation by default
  660. decisionHandler(WKNavigationResponsePolicyAllow);
  661. }
  662. /**
  663. * Called when an error occurs while the web view is loading content.
  664. * @see https://fburl.com/km6vqenw
  665. */
  666. - (void) webView:(WKWebView *)webView
  667. didFailProvisionalNavigation:(WKNavigation *)navigation
  668. withError:(NSError *)error
  669. {
  670. if (_onLoadingError) {
  671. if ([error.domain isEqualToString:NSURLErrorDomain] && error.code == NSURLErrorCancelled) {
  672. // NSURLErrorCancelled is reported when a page has a redirect OR if you load
  673. // a new URL in the WebView before the previous one came back. We can just
  674. // ignore these since they aren't real errors.
  675. // http://stackoverflow.com/questions/1024748/how-do-i-fix-nsurlerrordomain-error-999-in-iphone-3-0-os
  676. return;
  677. }
  678. if ([error.domain isEqualToString:@"WebKitErrorDomain"] && error.code == 102) {
  679. // Error code 102 "Frame load interrupted" is raised by the WKWebView
  680. // when the URL is from an http redirect. This is a common pattern when
  681. // implementing OAuth with a WebView.
  682. return;
  683. }
  684. NSMutableDictionary<NSString *, id> *event = [self baseEvent];
  685. [event addEntriesFromDictionary:@{
  686. @"didFailProvisionalNavigation": @YES,
  687. @"domain": error.domain,
  688. @"code": @(error.code),
  689. @"description": error.localizedDescription,
  690. }];
  691. _onLoadingError(event);
  692. }
  693. [self setBackgroundColor: _savedBackgroundColor];
  694. }
  695. - (void)evaluateJS:(NSString *)js
  696. thenCall: (void (^)(NSString*)) callback
  697. {
  698. [self.webView evaluateJavaScript: js completionHandler: ^(id result, NSError *error) {
  699. if (error == nil) {
  700. if (callback != nil) {
  701. callback([NSString stringWithFormat:@"%@", result]);
  702. }
  703. } else {
  704. RCTLogError(@"Error evaluating injectedJavaScript: This is possibly due to an unsupported return type. Try adding true to the end of your injectedJavaScript string.");
  705. }
  706. }];
  707. }
  708. /**
  709. * Called when the navigation is complete.
  710. * @see https://fburl.com/rtys6jlb
  711. */
  712. - (void) webView:(WKWebView *)webView
  713. didFinishNavigation:(WKNavigation *)navigation
  714. {
  715. if (_injectedJavaScript) {
  716. [self evaluateJS: _injectedJavaScript thenCall: ^(NSString *jsEvaluationValue) {
  717. NSMutableDictionary *event = [self baseEvent];
  718. event[@"jsEvaluationValue"] = jsEvaluationValue;
  719. if (self.onLoadingFinish) {
  720. self.onLoadingFinish(event);
  721. }
  722. }];
  723. } else if (_onLoadingFinish) {
  724. _onLoadingFinish([self baseEvent]);
  725. }
  726. [self setBackgroundColor: _savedBackgroundColor];
  727. }
  728. - (void)injectJavaScript:(NSString *)script
  729. {
  730. [self evaluateJS: script thenCall: nil];
  731. }
  732. - (void)goForward
  733. {
  734. [_webView goForward];
  735. }
  736. - (void)goBack
  737. {
  738. [_webView goBack];
  739. }
  740. - (void)reload
  741. {
  742. /**
  743. * When the initial load fails due to network connectivity issues,
  744. * [_webView reload] doesn't reload the webpage. Therefore, we must
  745. * manually call [_webView loadRequest:request].
  746. */
  747. NSURLRequest *request = [self requestForSource:self.source];
  748. if (request.URL && !_webView.URL.absoluteString.length) {
  749. [_webView loadRequest:request];
  750. } else {
  751. [_webView reload];
  752. }
  753. }
  754. - (void)stopLoading
  755. {
  756. [_webView stopLoading];
  757. }
  758. - (void)setBounces:(BOOL)bounces
  759. {
  760. _bounces = bounces;
  761. _webView.scrollView.bounces = bounces;
  762. }
  763. - (NSURLRequest *)requestForSource:(id)json {
  764. NSURLRequest *request = [RCTConvert NSURLRequest:self.source];
  765. // If sharedCookiesEnabled we automatically add all application cookies to the
  766. // http request. This is automatically done on iOS 11+ in the WebView constructor.
  767. // Se we need to manually add these shared cookies here only for iOS versions < 11.
  768. if (_sharedCookiesEnabled) {
  769. if (@available(iOS 11.0, *)) {
  770. // see WKWebView initialization for added cookies
  771. } else {
  772. NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:request.URL];
  773. NSDictionary<NSString *, NSString *> *cookieHeader = [NSHTTPCookie requestHeaderFieldsWithCookies:cookies];
  774. NSMutableURLRequest *mutableRequest = [request mutableCopy];
  775. [mutableRequest setAllHTTPHeaderFields:cookieHeader];
  776. return mutableRequest;
  777. }
  778. }
  779. return request;
  780. }
  781. @end