V2 status bar blur ios (#1700)

* statusBarBlur for ios

* unit tests for ios statusBarBlur

* Update README.md

README.md

 | topBarHideOnScroll    |  ✅     |  ✅    |     [Contribute](CONTRIBUTING.md)        |
 | topBarTranslucent     |  ✅     |   ✅     |     [Contribute](CONTRIBUTING.md)        |
 | topBarTransparent     | ✅      |   WIP @bogobogo     |     [Contribute](CONTRIBUTING.md)        |
-| topBarNoBorder        |  ✅     |    [Contribute](CONTRIBUTING.md)     |     [Contribute](CONTRIBUTING.md)        |
+| topBarNoBorder        |  ✅     |    ✅     |     [Contribute](CONTRIBUTING.md)        |
 | drawUnderTabBar       |  ✅     |    WIP @gran33     |      [Contribute](CONTRIBUTING.md)       |
 | drawUnderTopBar       |  ✅     |    WIP @gran33     |      [Contribute](CONTRIBUTING.md)       |
-| statusBarBlur         |  ✅     |    [Contribute](CONTRIBUTING.md)     |      [Contribute](CONTRIBUTING.md)       |
+| statusBarBlur         |  ✅     |    ✅     |      [Contribute](CONTRIBUTING.md)       |
 | topBarBlur            | ✅      |    [Contribute](CONTRIBUTING.md)     |      [Contribute](CONTRIBUTING.md)       |
 | tabBarHidden  |   ✅  |   [Contribute](CONTRIBUTING.md)     |    [Contribute](CONTRIBUTING.md)        |
 | statusBarTextColorScheme |  ✅   |   in development      |      / iOS specific    |

lib/ios/RNNNavigationOptions.h

 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 
+extern const NSInteger BLUR_STATUS_TAG;
+
 @interface RNNNavigationOptions : NSObject
 
 @property (nonatomic, strong) NSNumber* topBarBackgroundColor;
 @property (nonatomic, strong) NSString* tabBadge;
 @property (nonatomic, strong) NSNumber* topBarTextFontSize;
 @property (nonatomic, strong) NSNumber* topBarNoBorder;
-
+@property (nonatomic, strong) NSNumber* statusBarBlur;
 
 
 -(instancetype)init;

lib/ios/RNNNavigationOptions.m

 #import "RNNNavigationOptions.h"
 #import <React/RCTConvert.h>
 
+const NSInteger BLUR_STATUS_TAG = 78264801;
 
 @implementation RNNNavigationOptions
 
 			.shadowImage = nil;
 		}
 	}
-
+	
+	if (self.statusBarBlur) {
+		UIView* curBlurView = [viewController.view viewWithTag:BLUR_STATUS_TAG];
+		if ([self.statusBarBlur boolValue]) {
+			if (!curBlurView) {
+				UIVisualEffectView *blur = [[UIVisualEffectView alloc] initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]];
+				blur.frame = [[UIApplication sharedApplication] statusBarFrame];
+				blur.tag = BLUR_STATUS_TAG;
+				[viewController.view insertSubview:blur atIndex:0];
+			}
+		} else {
+			if (curBlurView) {
+				[curBlurView removeFromSuperview];
+			}
+		}
+	}
+	
 }
 @end

lib/ios/ReactNativeNavigationTests/RNNRootViewControllerTest.m

 	XCTAssertNil(self.uut.navigationController.navigationBar.shadowImage);
 }
 
+-(void)testStatusBarBlurOn {
+	NSNumber* statusBarBlurInput = @(1);
+	self.options.statusBarBlur = statusBarBlurInput;
+	__unused UINavigationController* nav = [[UINavigationController alloc] initWithRootViewController:self.uut];
+	[self.uut viewWillAppear:false];
+	XCTAssertNotNil([self.uut.view viewWithTag:BLUR_STATUS_TAG]);
+}
+
+-(void)testStatusBarBlurOff {
+	NSNumber* statusBarBlurInput = @(0);
+	self.options.statusBarBlur = statusBarBlurInput;
+	__unused UINavigationController* nav = [[UINavigationController alloc] initWithRootViewController:self.uut];
+	[self.uut viewWillAppear:false];
+	XCTAssertNil([self.uut.view viewWithTag:BLUR_STATUS_TAG]);
+}
+
+
 @end