Question

I’m calling a method from another view controller by using this:

   InitialViewController *secondController = [[InitialViewController alloc] init];
   [secondController forecast];

Here’s the method in the InitialViewController:

-(void)forecast{
    [UIView beginAnimations:@"Forecast" context:nil];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationDuration:1.0f];
    self.customPager.frame = CGRectMake(0,5, 320, 510);
    self.view1.frame = CGRectMake(-320,5, 320, 510);
    radarView.frame = CGRectMake(0,560, 320, 510);
    [UIView commitAnimations];
    NSLog(@"Method Passed");
}

In my console, I get the NSLog “Method Passed”, but the UIView animation does not occur at all. Any ideas?

Answer 1

It seems to me that you are not displaying in any way the view associated to secondController. I.e., after doing:

InitialViewController *secondController = [[InitialViewController alloc] init];

I would expect you do something like:

[self.view addSubview:secondController.view];

This would trigger loadView/viewDidLoad before you call forecast. Furthermore, I would give a chance to the UI to be show your view before animating it; thus, I would call forecast either like this:

[self performSelector:@selector(forecast) withObject:nil afterDelay:0.0];

or from viewDidAppear.

EDIT:

According to your comment,
your InitialViewController is already displayed on screen. In this case, what you should do is getting a reference to it and sending it the forecast message.

What you are doing now is instantiating a new InitialViewController (and then sending the forecast message to it) that has no relation with the one already displayed.