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react-native-webview
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Implemented transparent backgroundColor

Tom Underhill 5 years ago
parent
ba1be12ea0
commit
fec04c8df2
4 changed files with 100 additions and 15 deletions
Split View Show Diff Stats
  1. 14
    0
      example/App.js
  2. 64
    0
      example/examples/Background.js
  3. 13
    13
      example/examples/Scrolling.js
  4. 9
    2
      ios/RNCWebView.m

+ 14
- 0
example/App.js View File 

@@ -21,6 +21,7 @@ import {
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22 22 
 import Alerts from './examples/Alerts';
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 import Scrolling from './examples/Scrolling';
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+import Background from './examples/Background';
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 const TESTS = {
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   Alerts: {
 
@@ -39,6 +40,14 @@ const TESTS = {
39 40 
       return <Scrolling />;
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     },
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   },
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+  Background: {
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+    title: 'Background',
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+    testId: 'background',
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+    description: 'Background color test',
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+    render() {
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+      return <Background />;
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+    },
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+  },
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 };
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 type Props = {};
 
@@ -87,6 +96,11 @@ export default class App extends Component<Props, State> {
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             title="Scrolling"
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             onPress={() => this._changeTest('Scrolling')}
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           />
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+          <Button
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+            testID="testType_background"
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+            title="Background"
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+            onPress={() => this._changeTest('Background')}
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+          />
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         </View>
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         {restarting ? null : (

+ 64
- 0
example/examples/Background.js View File 

@@ -0,0 +1,64 @@
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+/**
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+ * Copyright (c) Facebook, Inc. and its affiliates.
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+ *
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+ * This source code is licensed under the MIT license found in the
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+ * LICENSE file in the root directory of this source tree.
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+ *
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+ * @format
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+ * @flow
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+ */
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+
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+import React, {Component} from 'react';
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+import {Text, View} from 'react-native';
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+
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+import WebView from 'react-native-webview';
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+
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+const HTML = `
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+<!DOCTYPE html>\n
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+<html>
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+  <head>
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+    <title>Hello World</title>
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+    <meta http-equiv="content-type" content="text/html; charset=utf-8">
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+    <meta name="viewport" content="width=320, user-scalable=no">
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+    <style type="text/css">
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+      body {
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+        margin: 0;
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+        padding: 0;
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+        font: 62.5% arial, sans-serif;
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+        background: transparent;
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+      }
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+    </style>
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+  </head>
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+  <body>
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+    <p>HTML content in transparent body.</p>
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+  </body>
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+</html>
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+`;
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+
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+type Props = {};
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+type State = {
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+  backgroundColor: string,
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+};
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+
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+export default class Background extends Component<Props, State> {
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+  state = {
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+    backgroundColor: '#FF00FF00'
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+  };
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+
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+  render() {
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+    return (
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+      <View>
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+        <View style={{backgroundColor:'red'}}>
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+          <View style={{ height: 120 }}>
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+            <WebView
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+              source={{html: HTML}}
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+              automaticallyAdjustContentInsets={false}
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+              style={{backgroundColor:'#00000000'}}
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+            />
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+          </View>
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+        </View>
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+        <Text>WebView is transparent contained in a View with a red backgroundColor</Text>
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+      </View>
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+    );
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+  }
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+}

+ 13
- 13
example/examples/Scrolling.js View File 

@@ -54,20 +54,20 @@ export default class Scrolling extends Component<Props, State> {
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   render() {
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     return (
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       <View>
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-      <View style={{ height: 120 }}>
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-        <WebView
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-          source={{html: HTML}}
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-          automaticallyAdjustContentInsets={false}
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-          onScroll={this._onScroll}
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-          scrollEnabled={this.state.scrollEnabled}
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+        <View style={{ height: 120 }}>
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+          <WebView
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+            source={{html: HTML}}
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+            automaticallyAdjustContentInsets={false}
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+            onScroll={this._onScroll}
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+            scrollEnabled={this.state.scrollEnabled}
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+          />
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+        </View>
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+        <Button
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+          title={this.state.scrollEnabled ? 'Scroll enabled' : 'Scroll disabled'}
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+          onPress={() => this.setState({scrollEnabled: !this.state.scrollEnabled})}
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         />
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-      </View>
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-      <Button
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-        title={this.state.scrollEnabled ? 'Scroll enabled' : 'Scroll disabled'}
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-        onPress={() => this.setState({scrollEnabled: !this.state.scrollEnabled})}
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-      />
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-      <Text>Last scroll event:</Text>
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-      <Text>{this.state.lastScrollEvent}</Text>
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+        <Text>Last scroll event:</Text>
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+        <Text>{this.state.lastScrollEvent}</Text>
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       </View>
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     );
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   }

+ 9
- 2
ios/RNCWebView.m View File 

@@ -449,12 +449,19 @@ static NSDictionary* customCertificatesForHost;
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   }
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   CGFloat alpha = CGColorGetAlpha(backgroundColor.CGColor);
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+  BOOL opaque = (alpha == 1.0);
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 #if !TARGET_OS_OSX
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-  self.opaque = _webView.opaque = (alpha == 1.0);
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+  self.opaque = _webView.opaque = opaque;
454 455 
   _webView.scrollView.backgroundColor = backgroundColor;
455 456 
   _webView.backgroundColor = backgroundColor;
456 457 
 #else
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-  // TODO
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+  // https://stackoverflow.com/questions/40007753/macos-wkwebview-background-transparency
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+  NSOperatingSystemVersion version = { 10, 12, 0 };
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+  if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion:version]) {
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+    [_webView setValue:@(opaque) forKey: @"drawsBackground"];
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+  } else {
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+    [_webView setValue:@(!opaque) forKey: @"drawsTransparentBackground"];
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+  }
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 #endif // !TARGET_OS_OSX
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 }
460 467