为什么 webview_flutter 在添加到应用程序（iOS）的情况下不起作用？

Question

So I am trying to open a simple webview when a button is clicked.

This is the body of my Scaffold widget:

body: 
WebView(
    initialUrl: "https://www.google.com/",
    javascriptMode: JavascriptMode.unrestricted,
)

The interesting part is when I run this flutter project independently it successfully opens the Webview in the iOS simulator. But when I integrated this flutter module into an existing iOS App it doesn't work (Shows a blank screen). In order to add a flutter module, I have followed this link , the other part of the module works fine.

I have already set this in the info.plist for the flutter module:

<key>io.flutter.embedded_views_preview</key>
<true/>

I have added the following version in pubspec.yaml file:

webview_flutter: ^0.3.22+1

Answer 1

After a few hours of debugging I found that we need to add this key in the iOS project info.plist file rather than putting it into the info.plist in the iOS folder of the flutter module

<key>io.flutter.embedded_views_preview</key>
<true/>

Answer 2

Ive ran into this issue too when using webview_flutter . Fortunately, the ios setup from flutter_webview_plugin seemed to work. I used this tag in xcode's Info.list:

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
    <key>NSAllowsArbitraryLoadsInWebContent</key>
    <true/>
</dict>

Please be mindful that they are currently merging to the official webview_flutter plugin.

Answer 3

If url you're using has some special character. So,You need to encode the URL like this,

 WebView( initialUrl: Uri.encodeFull(yourUrl), ... )