Is there an iOS method that fires when Autolayout has completed?

Question

I have an iOS app in which I need to know when a new view is completely visible on-screen; that is, when Autolayout has finished its calculations and the view has finished drawing.

ViewDidAppear seems to fire well before the view is completely visible. If I turn off Autolayout, the timing seems to line up as far as human perception goes, but I need to use Autolayout in this project (so this isn't a solution...just a test).

Is there any method that fires when Autolayout is done calculating? Or another method that fires when the view is ACTUALLY visible (since ViewDidAppear doesn't work for this)?

Thanks!

Answer 1

The following can be used to avoid multiple calls:

- (void) didFinishAutoLayout {

    // Do some stuff here.    

    NSLog(@"didFinishAutoLayout");
}

and

- (void) viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];


    [NSObject cancelPreviousPerformRequestsWithTarget:self
                                 selector:@selector(didFinishAutoLayout)
                                           object:nil];
    [self performSelector:@selector(didFinishAutoLayout) withObject:nil
               afterDelay:0];
}