Delay when using openURL right after after app launch - ios

Question

I am trying to launch another application using its url handler right on my own app launch.
- (void)applicationDidBecomeActive:(UIApplication *)application
{
NSURL *actionURL = [NSURL URLWithString:#"fantastical2://"];
[[UIApplication sharedApplication] openURL:actionURL];
}
It basically works, however there is a significant delay of about 7 seconds from seeing my app appear to actually opening the URL.
How come the delay? How can I launch open a URL/app immediately when launching my own app or reduce this delay?

Answer 1

You can resolve using any of the examples below.
Using diapatch_async
dispatch_async(dispatch_get_main_queue(), ^{
[[UIApplication sharedApplication] openURL:urlString];
});
Using perfomSelector
- (void)applicationDidBecomeActive:(UIApplication *)application
{
...
//hangs for 10 seconds
//[[UIApplication sharedApplication] openURL:[NSURL URLWithString: url]];
//Fix: use threads!
[self performSelector:#selector(redirectToURL:)
withObject:url afterDelay:0.0];
...
}
- (void)redirectToURL:(NSString *)url
{
[[UIApplication sharedApplication] openURL:[NSURL URLWithString: url]];
}
Using NSThread
- (void)applicationDidBecomeActive:(UIApplication *)application
{
...
//hangs for 10 seconds
//[[UIApplication sharedApplication] openURL:[NSURL URLWithString: url]];
//Fix: use threads!
[NSThread detachNewThreadSelector:#selector(openBrowserInBackground:)
toTarget:self withObject:url];
...
}
- (void)openBrowserInBackground:(NSString *)url
{
[[UIApplication sharedApplication] openURL:[NSURL URLWithString: url]];
}

Answer 2

Try with the NSTimer with target ..
For just Reference :
[NSTimer scheduledTimerWithTimeInterval:7.0
target:self
selector:#selector(targetMethod:)
userInfo:nil
repeats:NO];
-(void) targetMethod{
// Call Here ...
NSURL *actionURL = [NSURL URLWithString:#"fantastical2://"];
[[UIApplication sharedApplication] openURL:actionURL];
//Invalidate the time
[myTimer invalidate];
myTimer = nil;
}

Answer 3

Add your code in - (void)applicationDidFinishLaunching:(UIApplication *)application because - (void)applicationDidBecomeActive:(UIApplication *)application will be called after applicationDidFinishLaunching is called.

Answer 4

Try calling the -openURL method within a block that runs on the main thread. This will cause it to execute once everything else is loaded:
-(void)applicationDidBecomeActive:(UIApplication *)application {
dispatch_async(dispatch_get_main_queue(), ^{
NSURL *actionURL = [NSURL URLWithString:#"fantastical2://"];
[[UIApplication sharedApplication] openURL:actionURL];
});
}