UIView Hide/Show with animation

Question

My simple goal is to fade animate hiding and showing functions.

Button.hidden = YES;

Simple enough. However, is it possible to have it fade out rather than just disappearing? It looks rather unprofessional that way.

score 308 · Accepted Answer · edited Jan 23 '23 at 10:37

In iOS 4 and later, there's a way to do this just using the UIView transition method without needing to import QuartzCore. You can just say:

Objective C

[UIView transitionWithView:button
                  duration:0.4
                   options:UIViewAnimationOptionTransitionCrossDissolve
                animations:^{
                     button.hidden = YES;
                }
                completion:NULL];

Swift

UIView.transition(with: button, duration: 0.4, 
                  options: .transitionCrossDissolve, 
                  animations: {
                 self.button.isHidden = false
              })

Previous Solution

Michail's solution will work, but it's not actually the best approach.

The problem with alpha fading is that sometimes the different overlapping view layers look weird as they fade out. There are some other alternatives using Core Animation. First include the QuartzCore framework in your app and add #import <QuartzCore/QuartzCore.h> to your header. Now you can do one of the following:

set button.layer.shouldRasterize = YES; and then use the alpha animation code that Michail provided in his answer. This will prevent the layers from blending weirdly, but has a slight performance penalty, and can make the button look blurry if it's not aligned exactly on a pixel boundary.

Alternatively:

Use the following code to animate the fade instead:

CATransition *animation = [CATransition animation]; animation.type = kCATransitionFade; animation.duration = 0.4; [button.layer addAnimation:animation forKey:nil];

button.hidden = YES;

The nice thing about this approach is you can crossfade any property of the button even if they aren't animatable (e.g. the text or image of the button), just set up the transition and then set your properties immediately afterwards.

@robmathers , I just test your code , above two code just work when button.hidden = NO, for fade in situation; have no animation effect for fade out when button.hidden = YES; — Jason, Jul 09 '17 at 05:45
You should use the superview of the thing you are animating as the `transitionWithView` parameter to ensure a successful fade in and out. — allenh, Jan 29 '19 at 19:10

score 174 · Answer 2 · edited May 28 '18 at 05:17

174

UIView animated properties are:

- frame
- bounds
- center
- transform
- alpha
- backgroundColor
- contentStretch

Describe in: Animations

isHidden is not one of them, so as I see it the best way is:

Swift 4:

func setView(view: UIView, hidden: Bool) {
    UIView.transition(with: view, duration: 0.5, options: .transitionCrossDissolve, animations: {
        view.isHidden = hidden
    })
}

Objective C:

- (void)setView:(UIView*)view hidden:(BOOL)hidden {
    [UIView transitionWithView:view duration:0.5 options:UIViewAnimationOptionTransitionCrossDissolve animations:^(void){
        [view setHidden:hidden];
    } completion:nil];
}

edited May 28 '18 at 05:17

Mahendra

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answered Mar 16 '15 at 15:37

evya

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10

Actually this is the simple and best answer – Irshad Mohamed Aug 12 '15 at 13:21
3

While this animates correctly, the UISearchBar I'm trying to display appears in the wrong location until the animation completes and then instantly jumps to the correct position. Any idea? I'm using Storyboards with Interface Builder and Constraints. – Greg Hilston Jun 13 '17 at 21:52
8

This code doesn't work ... it directly change the state without animating – Mihir Mehta Jun 27 '17 at 06:49
7

@evya Only work for fade in when hidden = NO ， Not work for fade out, hidden = YES – Jason Jul 09 '17 at 05:51
Seems to be broken in iOS 12.0 – user3532505 Dec 15 '18 at 15:15

score 142 · Answer 3 · edited Feb 19 '20 at 12:59

142

To fade out:

Objective-C

[UIView animateWithDuration:0.3 animations:^{
    button.alpha = 0;
} completion: ^(BOOL finished) {//creates a variable (BOOL) called "finished" that is set to *YES* when animation IS completed.
    button.hidden = finished;//if animation is finished ("finished" == *YES*), then hidden = "finished" ... (aka hidden = *YES*)
}];

Swift 2

UIView.animateWithDuration(0.3, animations: {
    button.alpha = 0
}) { (finished) in
    button.hidden = finished
}

Swift 3, 4, 5

UIView.animate(withDuration: 0.3, animations: {
    button.alpha = 0
}) { (finished) in
    button.isHidden = finished
}

To fade in:

Objective-C

button.alpha = 0;
button.hidden = NO;
[UIView animateWithDuration:0.3 animations:^{
    button.alpha = 1;
}];

Swift 2

button.alpha = 0
button.hidden = false
UIView.animateWithDuration(0.3) {
    button.alpha = 1
}

Swift 3, 4, 5

button.alpha = 0
button.isHidden = false
UIView.animate(withDuration: 0.3) {
    button.alpha = 1
}

edited Feb 19 '20 at 12:59

Karen Hovhannisyan

1,140
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answered Feb 02 '12 at 16:28

Mikhail Grebionkin

3,806
2
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18

using the fade in/out in conjunction with the hidden state solved my problem – aclima Jun 01 '16 at 15:58
For some reason, animating to hidden=YES worked fine for me, but animating to hidden=NO did nothing, so this combination of animating the alpha and setting the hidden property was helpful. – arlomedia Feb 10 '17 at 01:30
I just write a demo , but only hidden = NO , fade in works, strange – Jason Jul 09 '17 at 05:48

score 13 · Answer 4 · answered Jul 23 '19 at 10:20

Use this solution for a smooth fadeOut and fadeIn effects

extension UIView {
    func fadeIn(duration: TimeInterval = 0.5, delay: TimeInterval = 0.0, completion: @escaping ((Bool) -> Void) = {(finished: Bool) -> Void in }) {
        self.alpha = 0.0

        UIView.animate(withDuration: duration, delay: delay, options: UIView.AnimationOptions.curveEaseIn, animations: {
            self.isHidden = false
            self.alpha = 1.0
        }, completion: completion)
    }

    func fadeOut(duration: TimeInterval = 0.5, delay: TimeInterval = 0.0, completion: @escaping (Bool) -> Void = {(finished: Bool) -> Void in }) {
        self.alpha = 1.0

        UIView.animate(withDuration: duration, delay: delay, options: UIView.AnimationOptions.curveEaseOut, animations: {
            self.isHidden = true
            self.alpha = 0.0
        }, completion: completion)
    }
}

usage is as like

uielement.fadeIn()
uielement.fadeOut()

Thanks

`fadeOut` works on iOS 13 only if I remove the lines that set `self.isHidden`. — Mike Taverne, Dec 31 '19 at 22:57

Mark Mckelvie · Answer 5 · 2017-02-28T03:49:03.900

I use this little Swift 3 extension:

extension UIView {

  func fadeIn(duration: TimeInterval = 0.5,
              delay: TimeInterval = 0.0,
              completion: @escaping ((Bool) -> Void) = {(finished: Bool) -> Void in }) {
    UIView.animate(withDuration: duration,
                   delay: delay,
                   options: UIViewAnimationOptions.curveEaseIn,
                   animations: {
      self.alpha = 1.0
    }, completion: completion)
  }

  func fadeOut(duration: TimeInterval = 0.5,
               delay: TimeInterval = 0.0,
               completion: @escaping (Bool) -> Void = {(finished: Bool) -> Void in }) {
    UIView.animate(withDuration: duration,
                   delay: delay,
                   options: UIViewAnimationOptions.curveEaseIn,
                   animations: {
      self.alpha = 0.0
    }, completion: completion)
  }
}

This one actually worked. None of the other solutions seemed to actually make it fade in/out. And the extension is super nice. Well done. :) — Iskeraet, Nov 06 '20 at 04:00

score 10 · Answer 6 · answered Dec 15 '16 at 03:06

Swift 3

func appearView() {
     self.myView.alpha = 0
     self.myView.isHidden = false

     UIView.animate(withDuration: 0.9, animations: {
         self.myView.alpha = 1
     }, completion: {
         finished in
         self.myView.isHidden = false
     })
}

score 9 · Answer 7 · answered Dec 09 '18 at 08:54

swift 4.2

with extension :

extension UIView {
func hideWithAnimation(hidden: Bool) {
        UIView.transition(with: self, duration: 0.5, options: .transitionCrossDissolve, animations: {
            self.isHidden = hidden
        })
    }
}

simple method:

func setView(view: UIView, hidden: Bool) {
    UIView.transition(with: view, duration: 0.5, options: .transitionCrossDissolve, animations: {
        view.isHidden = hidden
    })
}

How can I add delay for this one? – cvdogan Mar 30 '19 at 20:06 — cvdogan, Mar 30 '19 at 20:06

score 7 · Answer 8 · answered May 10 '19 at 12:42

the code of @Umair Afzal working fine in swift 5 after some changes

 extension UIView {

func fadeIn(duration: TimeInterval = 0.5, delay: TimeInterval = 0.0, completion: @escaping ((Bool) -> Void) = {(finished: Bool) -> Void in }) {
    self.alpha = 0.0

    UIView.animate(withDuration: duration, delay: delay, options: UIView.AnimationOptions.curveEaseIn, animations: {
        self.isHidden = false
        self.alpha = 1.0
    }, completion: completion)
}

func fadeOut(duration: TimeInterval = 0.5, delay: TimeInterval = 0.0, completion: @escaping (Bool) -> Void = {(finished: Bool) -> Void in }) {
    self.alpha = 1.0

    UIView.animate(withDuration: duration, delay: delay, options: UIView.AnimationOptions.curveEaseIn, animations: {
        self.alpha = 0.0
    }) { (completed) in
        self.isHidden = true
        completion(true)
    }
  }
}

for use

yourView.fadeOut()
yourView.fadeIn()

giving some hard effect while fadeout, added some better solution [here](https://stackoverflow.com/a/57161910/3602846) — Dhanu K, Jul 23 '19 at 10:22

Valentin Shergin · Answer 9 · 2016-04-27T00:09:22.573

I created category for UIView for this purpose and implemented a special little bit different concept: visibility. The main difference of my solution is that you can call [view setVisible:NO animated:YES] and right after that synchronously check [view visible] and get correct result. This is pretty simple but extremely useful.

Besides, it is allowed to avoid using "negative boolean logic" (see Code Complete, page 269, Use positive boolean variable names for more information).

Swift

UIView+Visibility.swift

import UIKit


private let UIViewVisibilityShowAnimationKey = "UIViewVisibilityShowAnimationKey"
private let UIViewVisibilityHideAnimationKey = "UIViewVisibilityHideAnimationKey"


private class UIViewAnimationDelegate: NSObject {
    weak var view: UIView?

    dynamic override func animationDidStop(animation: CAAnimation, finished: Bool) {
        guard let view = self.view where finished else {
            return
        }

        view.hidden = !view.visible
        view.removeVisibilityAnimations()
    }
}


extension UIView {

    private func removeVisibilityAnimations() {
        self.layer.removeAnimationForKey(UIViewVisibilityShowAnimationKey)
        self.layer.removeAnimationForKey(UIViewVisibilityHideAnimationKey)
    }

    var visible: Bool {
        get {
            return !self.hidden && self.layer.animationForKey(UIViewVisibilityHideAnimationKey) == nil
        }

        set {
            let visible = newValue

            guard self.visible != visible else {
                return
            }

            let animated = UIView.areAnimationsEnabled()

            self.removeVisibilityAnimations()

            guard animated else {
                self.hidden = !visible
                return
            }

            self.hidden = false

            let delegate = UIViewAnimationDelegate()
            delegate.view = self

            let animation = CABasicAnimation(keyPath: "opacity")
            animation.fromValue = visible ? 0.0 : 1.0
            animation.toValue = visible ? 1.0 : 0.0
            animation.fillMode = kCAFillModeForwards
            animation.removedOnCompletion = false
            animation.delegate = delegate

            self.layer.addAnimation(animation, forKey: visible ? UIViewVisibilityShowAnimationKey : UIViewVisibilityHideAnimationKey)
        }
    }

    func setVisible(visible: Bool, animated: Bool) {
        let wereAnimationsEnabled = UIView.areAnimationsEnabled()

        if wereAnimationsEnabled != animated {
            UIView.setAnimationsEnabled(animated)
            defer { UIView.setAnimationsEnabled(!animated) }
        }

        self.visible = visible
    }

}

Objective-C

UIView+Visibility.h

#import <UIKit/UIKit.h>

@interface UIView (Visibility)

- (BOOL)visible;
- (void)setVisible:(BOOL)visible;
- (void)setVisible:(BOOL)visible animated:(BOOL)animated;

@end

UIView+Visibility.m

#import "UIView+Visibility.h"

NSString *const UIViewVisibilityAnimationKeyShow = @"UIViewVisibilityAnimationKeyShow";
NSString *const UIViewVisibilityAnimationKeyHide = @"UIViewVisibilityAnimationKeyHide";

@implementation UIView (Visibility)

- (BOOL)visible
{
    if (self.hidden || [self.layer animationForKey:UIViewVisibilityAnimationKeyHide]) {
        return NO;
    }

    return YES;
}

- (void)setVisible:(BOOL)visible
{
    [self setVisible:visible animated:NO];
}

- (void)setVisible:(BOOL)visible animated:(BOOL)animated
{
    if (self.visible == visible) {
        return;
    }

    [self.layer removeAnimationForKey:UIViewVisibilityAnimationKeyShow];
    [self.layer removeAnimationForKey:UIViewVisibilityAnimationKeyHide];

    if (!animated) {
        self.alpha = 1.f;
        self.hidden = !visible;
        return;
    }

    self.hidden = NO;

    CGFloat fromAlpha = visible ? 0.f : 1.f;
    CGFloat toAlpha = visible ? 1.f : 0.f;
    NSString *animationKey = visible ? UIViewVisibilityAnimationKeyShow : UIViewVisibilityAnimationKeyHide;

    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    animation.duration = 0.25;
    animation.fromValue = @(fromAlpha);
    animation.toValue = @(toAlpha);
    animation.delegate = self;
    animation.removedOnCompletion = NO;
    animation.fillMode = kCAFillModeForwards;
    [self.layer addAnimation:animation forKey:animationKey];
}

#pragma mark - CAAnimationDelegate

- (void)animationDidStop:(CAAnimation *)animation finished:(BOOL)finished
{
    if ([[self.layer animationForKey:UIViewVisibilityAnimationKeyHide] isEqual:animation]) {
        self.hidden = YES;
    }
}

@end

Defer block is executed before leaving if scope. I believe it is not how you expect it to behave — Vladimir Borodko, Jan 12 '21 at 21:42

score 5 · Answer 10 · answered Aug 13 '20 at 19:09

Swift 5.0, with generics:

func hideViewWithAnimation<T: UIView>(shouldHidden: Bool, objView: T) {
    if shouldHidden == true {
        UIView.animate(withDuration: 0.3, animations: {
            objView.alpha = 0
        }) { (finished) in
            objView.isHidden = shouldHidden
        }
    } else {
        objView.alpha = 0
        objView.isHidden = shouldHidden
        UIView.animate(withDuration: 0.3) {
            objView.alpha = 1
        }
    }
}

Use:

hideViewWithAnimation(shouldHidden: shouldHidden, objView: itemCountLabelBGView)
hideViewWithAnimation(shouldHidden: shouldHidden, objView: itemCountLabel)
hideViewWithAnimation(shouldHidden: shouldHidden, objView: itemCountButton)

Here itemCountLabelBGView is a UIView, itemCountLabel is a UILabel & itemCountButton is a UIButton, So it will work for every view object whose parent class is UIView.

Umair Afzal · Answer 11 · 2018-07-19T11:13:54.710

Swift 4

extension UIView {

func fadeIn(duration: TimeInterval = 0.5, delay: TimeInterval = 0.0, completion: @escaping ((Bool) -> Void) = {(finished: Bool) -> Void in }) {
    self.alpha = 0.0

    UIView.animate(withDuration: duration, delay: delay, options: UIViewAnimationOptions.curveEaseIn, animations: {
        self.isHidden = false
        self.alpha = 1.0
    }, completion: completion)
}

func fadeOut(duration: TimeInterval = 0.5, delay: TimeInterval = 0.0, completion: @escaping (Bool) -> Void = {(finished: Bool) -> Void in }) {
    self.alpha = 1.0

    UIView.animate(withDuration: duration, delay: delay, options: UIViewAnimationOptions.curveEaseIn, animations: {
        self.alpha = 0.0
    }) { (completed) in
        self.isHidden = true
        completion(true)
    }
}
}

And to use use it, simple call these functions like:

yourView.fadeOut() // this will hide your view with animation
yourView.fadeIn() /// this will show your view with animation

There is a difference, he was not hiding the view. And I needed to hide the view as well. So did that and share it. — Umair Afzal, Jul 19 '18 at 11:12
Why not just comment on the other answer instead of copying it and passing off as your own? — Ashley Mills, Jul 19 '18 at 11:13

score 3 · Answer 12 · answered Sep 30 '19 at 12:56

isHidden is an immediate value and you cannot affect an animation on it, instead of this you can use Alpha for hide your view

UIView.transition(with: view, duration: 0.5, options: .transitionCrossDissolve, animations: {
        view.alpha = 0
    })

And for showing:

UIView.transition(with: view, duration: 0.5, options: .transitionCrossDissolve, animations: {
      view.alpha = 1
})

score 1 · Answer 13 · answered Apr 03 '17 at 20:00

func flipViews(fromView: UIView, toView: UIView) {

    toView.frame.origin.y = 0

    self.view.isUserInteractionEnabled = false

    UIView.transition(from: fromView, to: toView, duration: 0.5, options: .transitionFlipFromLeft, completion: { finished in            

        fromView.frame.origin.y = -900

        self.view.isUserInteractionEnabled = true

    })


}

score 1 · Answer 14 · answered Apr 17 '18 at 09:50

You can try this.

 func showView(objView:UIView){

    objView.alpha = 0.0
    UIView.animate(withDuration: 0.5, animations: {
        objView.alpha = 0.0
    }, completion: { (completeFadein: Bool) -> Void in
        objView.alpha = 1.0
        let transition = CATransition()
        transition.duration = 0.5
        transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
        transition.type = kCATransitionFade
        objView.layer.add(transition, forKey: nil)
    })
}

func HideView(objView:UIView){

    UIView.animate(withDuration: 0.5, animations: {
        objView.alpha = 1.0
    }, completion: { (completeFadein: Bool) -> Void in
        objView.alpha = 0.0
        let transition = CATransition()
        transition.duration = 0.5
        transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
        transition.type = kCATransitionFade
        objView.layer.add(transition, forKey: nil)
    })
}

And pass your view name

        showView(objView: self.viewSaveCard)
        HideView(objView: self.viewSaveCard)

score 1 · Answer 15 · answered Oct 23 '19 at 21:12

If your view is set to hidden by default or you change the Hidden state which I think you should in many cases, then none of the approaches in this page will give you both FadeIn/FadeOut animation, it will only animate one of these states, the reason is you are setting the Hidden state to false before calling UIView.animate method which will cause a sudden visibility and if you only animate the alpha then the object space is still there but it's not visible which will result to some UI issues.

So the best approach is to check first if the view is hidden then set the alpha to 0.0, like this when you set the Hidden state to false you won't see a sudden visibility.

func hideViewWithFade(_ view: UIView) {
    if view.isHidden {
        view.alpha = 0.0
    }

    view.isHidden = false

    UIView.animate(withDuration: 0.3, delay: 0.0, options: .transitionCrossDissolve, animations: {
        view.alpha = view.alpha == 1.0 ? 0.0 : 1.0
    }, completion: { _ in
        view.isHidden = !Bool(truncating: view.alpha as NSNumber)
    })
}

This solves the issue others have asked about where fadeins weren't working. Clever approach. — BooTooMany, Nov 11 '19 at 22:23

LiLi Kazine · Answer 16 · 2020-07-17T06:55:20.230

UIView.transition(with:) function is nice and neat.

Many have posted it but none has noticed there lies a fault will show up only when you run it.

You can transition hidden property to true perfectly, whereas when you attempt to transition it to false, the view will simple disappear suddenly without any animation.

That's because this api only works within a view, which means when you transition a view to show, in fact itself shows immediately, only its content animated out gradually.

When you try to hide this view, itself hide right away, makes the animation to its content meaningless.

To solve this, when hiding a view, the transition target should be its parent view instead of the view you want to hide.

func transitionView(_ view: UIView?, show: Bool, completion: BoolFunc? = nil) {
    guard let view = view, view.isHidden == show, let parent = view.superview else { return }

    let target: UIView = show ? view : parent
    UIView.transition(with: target, duration: 0.4, options: [.transitionCrossDissolve], animations: {
        view.isHidden = !show
    }, completion: completion)
}

Wasim · Answer 17 · 2020-10-23T17:17:54.853

1

UIView.transition(with: title3Label, duration: 0.4,
                          options: .transitionCrossDissolve,
                          animations: {
                            self.title3Label.isHidden = !self.title3Label.isHidden
                      })

Applying transition on View with some delay gives hide and show effect

edited Oct 23 '20 at 17:17

answered Oct 22 '20 at 22:34

Wasim

921
12
14

4

Please don't post only code as answer, but also provide an explanation what your code does and how it solves the problem of the question. Answers with an explanation are usually more helpful and of better quality, and are more likely to attract upvotes. – Mark Rotteveel Oct 23 '20 at 07:47

score 0 · Answer 18 · answered Oct 25 '15 at 17:53

0

You can do it VERY easily using Animatics library:

//To hide button:
AlphaAnimator(0) ~> button

//to show button
AlphaAnimator(1) ~> button

answered Oct 25 '15 at 17:53

Nikita Arkhipov

1,208
4
11
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score 0 · Answer 19 · answered Feb 20 '17 at 17:52

My solution for Swift 3. So, I created the function, that hide/unhide view in the right order(when hiding - set alpha to 0 and then isHidden to true; unhiding - first reveal the view and then set it's alpha to 1):

func hide(_ hide: Bool) {
    let animations = hide ? { self.alpha = 0 } :
                            { self.isHidden = false }
    let completion: (Bool) -> Void = hide ? { _ in self.isHidden = true } :
                                            { _ in UIView.animate(withDuration: duration, animations: { self.alpha = 1 }) }
    UIView.animate(withDuration: duration, animations: animations, completion: completion)
}

Why in `completion` block there's another animation when `hide`is false? — Giorgio, Jun 19 '18 at 10:58

score 0 · Answer 20 · answered Sep 24 '17 at 05:21

Swift 4 Transition

    UIView.transition(with: view, duration: 3, options: .transitionCurlDown,
                      animations: {
                        // Animations
                        view.isHidden = hidden
    },
                      completion: { finished in
                        // Compeleted
    })

If you use the approach for older swift versions you'll get an error :

Cannot convert value of type '(_) -> ()' to expected argument type '(() -> Void)?'

Useful reference.

does this work with autolayout? similar code isn't animating. the `isHidden` value is rendered instantly (i.e., instantly hiding/showing view). — Crashalot, Nov 01 '17 at 09:04

score 0 · Answer 21 · answered Oct 03 '18 at 11:17

This code give an animation like pushing viewController in uinavigation controller...

CATransition *animation = [CATransition animation];
 animation.type = kCATransitionPush;
 animation.subtype = kCATransitionFromRight;
 animation.duration = 0.3;
 [_viewAccountName.layer addAnimation:animation forKey:nil];

 _viewAccountName.hidden = true;

Used this for pop animation...

 CATransition *animation = [CATransition animation];
 animation.type = kCATransitionPush;
 animation.subtype = kCATransitionFromLeft;
 animation.duration = 0.3;
 [_viewAccountName.layer addAnimation:animation forKey:nil];

 _viewAccountName.hidden = false;

William Hu · Answer 22 · 2019-03-20T06:23:04.657

Tried some of the exited answers, some only work for one situation, some of them need to add two functions.

Option 1

Nothing to do with view.isHidden.

extension UIView {
    func animate(fadeIn: Bool, withDuration: TimeInterval = 1.0) {
        UIView.animate(withDuration: withDuration, delay: 0.0, options: .curveEaseInOut, animations: {
            self.alpha = fadeIn ? 1.0 : 0.0
        })
    }
}

Then pass isFadeIn (true or false)

view.animate(fadeIn: isFadeIn)

Option 2

Don't pass any parameter. It fades in or out according to isUserInteractionEnabled. This also suits the situation animate back and forth very well.

func animateFadeInOut(withDuration: TimeInterval = 1.0) {
    self.isUserInteractionEnabled = !self.isUserInteractionEnabled
    UIView.animate(withDuration: withDuration, delay: 0.0, options: .curveEaseInOut, animations: {
        self.alpha = self.isUserInteractionEnabled ? 1.0 : 0.0
    })
}

Then you call

yourView.animateFadeInOut()

Why self.isUserInteractionEnabled ?

Tried to replace self.isUserInteractionEnabled by self.isHidden, no luck at all.

That's it. Cost me sometime, hope it helps someone.

UIView Hide/Show with animation

22 Answers22

Objective C

Swift

Previous Solution

Swift

Objective-C

Linked

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