Question

I’m doing some custom animations to change views in a single method. I already removed "fromView" from superView using [UIView setAnimationDidStopSelector:@selector(removeFromSuperview)], but I also want to enable user interaction after the end of the animation.

Here’s my code:

-(void) switchFrom:(UIViewController*) fromViewController To:(UIViewController*) toViewController usingAnimation:(int) animation{
    UIView *fromView = fromViewController.view;
    UIView *toView = toViewController.view;
    /*************** SET ALL DEFAULT TRANSITION SETTINGS ***************/
    // Get the current view frame, width and height
    CGRect pageFrame = fromView.frame;
    CGFloat pageWidth = pageFrame.size.width;
    
    // Create the animation
    [UIView beginAnimations:nil context:nil];
    
    // Create the delegate, so the "fromView" is removed after the transition
    [UIView setAnimationDelegate: fromView];
    [UIView setAnimationDidStopSelector:@selector(removeFromSuperview)];
    
    // Set the transition duration
    [UIView setAnimationDuration: 0.4];

    /*************** IT DOESN'T WORK AT ALL ***************/
    [toView setUserInteractionEnabled:NO];
    [UIView setAnimationDelegate: toView];
    [UIView setAnimationDidStopSelector:@selector(setUserInteractionEnabled:)];
    [toView setUserInteractionEnabled:YES];

    // Add the "toView" as subview of "fromView" superview
    [fromView.superview addSubview:toView];
    switch (animation) {
        case AnimationPushFromRigh:{
            // Position the "toView" to the right corner of the page            
            toView.frame = CGRectOffset(pageFrame, pageWidth,0);
            
            // Animate the "fromView" to the left corner of the page
            fromView.frame = CGRectOffset(pageFrame, -pageWidth,0);
            
            // Animate the "toView" to the center of the page
            toView.frame = pageFrame;
            
            // Animate the "fromView" alpha
            fromView.alpha = 0;
            
            // Set and animate the "toView" alpha
            toView.alpha = 0;
            toView.alpha = 1;

            // Commit the animation
            [UIView commitAnimations];
        }
        .
        .
        .

Any idea how can I call this two methods in setAnimationDidStopSelector and actually make them work together?

EDIT 1

Tried @safecase code like this, replacing this commented block:

/*************** IT DOESN'T WORK AT ALL ***************
[toView setUserInteractionEnabled:NO];
[UIView setAnimationDelegate: toView];
[UIView setAnimationDidStopSelector:@selector(setUserInteractionEnabled:)];
[toView setUserInteractionEnabled:YES];
*************** IT DOESN'T WORK AT ALL ***************/
// Remove the interaction
[toView setUserInteractionEnabled:NO];
[fromView setUserInteractionEnabled:NO];
// Create the animation
[UIView animateWithDuration:0.4 animations:^{
    [fromView performSelector:@selector(removeFromSuperview)];
    }
    completion:^(BOOL finished){
        [UIView animateWithDuration:0.4 
        animations:^{ 
            C6Log(@"finished");
            [toView performSelector: @selector(setUserInteractionEnabled:)];
        }];
    }];

The "toView" is removed instead of the "fromView" is removed 🙁
The buttons continue to be interactive during the animation

Answer 1

I ended up creating a Category extension to UIView… and it finally works!

UIView+Animated.h code

#import <UIKit/UIKit.h>

@interface UIView (Animated)

- (void) finishedAnimation;

@end

UIView+Animated.m code

#import "UIView+Animated.h"

@implementation UIView (Animated)

- (void) finishedAnimation{
    C6Log(@"FinishedAnimation!");
    [self removeFromSuperview];
    [[UIApplication sharedApplication] endIgnoringInteractionEvents];
}

@end

Then, I #imported this extension in my coordinating controller:

C6CoordinatingController.h partial code

#import "UIView+Animated.h"

And called the selector in setAnimationDidStopSelector:

C6CoordinatingController.m partial code

// Create the delegate, so the "fromView" is removed after the transition
[UIView setAnimationDelegate: fromView];

// Ignore interaction events during the animation
[[UIApplication sharedApplication] beginIgnoringInteractionEvents];

// Set the transition duration
[UIView setAnimationDuration: 0.4];

// Call UIView+Animated "finishedAnimation" method when animation stops
[UIView setAnimationDidStopSelector:@selector(finishedAnimation)];

So, I ended up using @jaydee3 and @Mundi concepts and it works like a charm!

Thank you guys!