Jonathan Li created CB-11422:
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Summary: ios SplashScreen plugin may make webview disabled by not
calling destroyView method
Key: CB-11422
URL: https://issues.apache.org/jira/browse/CB-11422
Project: Apache Cordova
Issue Type: Bug
Components: Plugin SplashScreen
Affects Versions: 3.5.0
Environment: ios
Reporter: Jonathan Li
When using ios splash screen, it is noticed sometimes, after the splash screen
is dimissed, the ios main uiwebview is disabled. So even if the content in the
webview shows properly, but user cannot click on any items on the screen.
The project adds the splash screen plugin, and use all default settings.
The debug shows, when the page loaded is finished, it calls pageDidLoad method,
which calls setVisible to NO. Inside the setVisible method, in the
dispatch_after block, the completion block will only call destroyViews method
if the screen transition is finished at below code block
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (uint64_t)
effectiveSplashDuration * NSEC_PER_SEC), dispatch_get_main_queue(),
CFBridgingRelease(CFBridgingRetain(^(void) {
NSLog(@"splash screen: block %@", NSStringFromSelector(_cmd));
[UIView transitionWithView:self.viewController.view
duration:(fadeDuration / 1000)
options:UIViewAnimationOptionTransitionNone
animations:^(void) {
[weakSelf hideViews];
}
completion:^(BOOL finished) {
NSLog(@"splash screen: %@ finished %d",
NSStringFromSelector(_cmd), finished);
if (finished) {
[weakSelf destroyViews];
// TODO: It might also be nice to
have a js event happen here -jm
}
}
];
})));
}
}
The problem is if the webview is busy to handle other events (in the testing
project, there are several update on frame and bounds, so it calls updateImage
few times), then the transition will not be finished when completion block is
called. As a result, the destroyView will not be called and the
userInteractionEnabled is not set to true after the splash screen is dismissed.
One possible solution is removing the observer and also enable user interaction
within setVisible method, as there is no point to continue observer the frame
and bound change when splash screen starts to fade out. And it can also be sure
the user interaction is always enabled again after dismissing the splash screen.
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