iOS build failure

[craig-at-rsg]

Issue: xcode fails to build AppPreferences.m

The message is: .../Plugins/cordova-plugin-app-preferences/AppPreferences.m:24:16: No visible @interface for 'UIView' declares the selector 'stringByEvaluatingJavaScriptFromString:'

Here's the function:

- (void)defaultsChanged:(NSNotification *)notification {
    NSString * jsCallBack = [NSString stringWithFormat:@"cordova.fireDocumentEvent('preferencesChanged');"];
    [self.webView stringByEvaluatingJavaScriptFromString:jsCallBack];
}

---

Please specify your environment

Plugin version:

• [x] released version: 0.7.4
• [ ] repository master

Toolchain:

• [x] Cordova cli
• [ ] Phonegap cli
• [ ] Phonegap cloud
• [ ] Ionic
• [x] Other: XCode

Platforms affected:

• [ ] Android
• [x] iOS/macOS
• [ ] LocalStorage fallback for browser and blackberry
• [ ] Windows and Windows Phone 8.1 and later
• [ ] Windows Phone 8 and earlier (deprecated)

What the scope of your problem:

• [ ] General functionality (store/fetch/remove/clearAll)
• [ ] Suites
• [ ] Cloud synchronization and events
• [ ] Preferences pane generation and display

[craig-at-rsg]

Here's an example fix: https://github.com/Telerik-Verified-Plugins/PushNotification/commit/ddaa7a1548b01eccbc7f3fdd24f7356057c3931e