CODEWITHSUNDEEP
iosswiftanimation
Aurélien
Aurélien

Reputation: 65

withDuration is ignored during UIView.animate

I'am trying to animate the opacity of a AVPlayerLayer when a button is tapped. Here is my function :

@IBAction func boutonTapped(_ sender: UIButton) {
        if(paused){
            UIView.animate(withDuration: 5.0, animations: {
                self.avPlayerLayer.opacity = 1.0
            }, completion: nil)
            //avPlayer.play()
        }else{
            UIView.animate(withDuration: 5.0, animations: {
                self.avPlayerLayer.opacity = 0
            }, completion:nil)
            //avPlayer.pause()

        }
        paused = !paused
    }

An opacity animation is launched but it is very speed (about 0.5s). I tried to change the duration for 10s and the animation is the same

I tried to add self.view.layoutIfNeeded() inside the animation block with no effect.

Have you any idea ? Thanks !

Upvotes: 1

Views: 170

Answers (3)

Shreeram Bhat
Shreeram Bhat

Reputation: 3157

I think you need to put self.view.layoutIfNeeded() inside animation block but not the opacity update code. Like this,

@IBAction func boutonTapped(_ sender: UIButton) {
    if (paused) {
        self.avPlayerLayer.opacity = 1.0
        //avPlayer.play()
    } else {
        self.avPlayerLayer.opacity = 0
        //avPlayer.pause()
    }
    UIView.animate(withDuration: 5.0, animations: {
        self.view.layoutIfNeeded()
    }, completion: nil)
    paused = !paused
}

Upvotes: 0

Sagar Chauhan
Sagar Chauhan

Reputation: 5823

You should change an animation code to change opacity of AVPlayerLayer as follow:

@IBAction func boutonTapped(_ sender: UIButton) {

    UIView.transition(with: self.videoPlayerView, duration: 5.0, options: [.transitionCrossDissolve], animations: {
        self.videoPlayerView.layer.sublayers?.first(where: { $0 is AVPlayerLayer })?.opacity = paused ? 1 : 0
    }, completion: nil)
    paused ? avPlayer.play() : avPlayer.pause()
}

videoPlayerView is view where you have added AVPlayerLayer instance.

Upvotes: 0

PGDev
PGDev

Reputation: 24341

Instead of animating the opacity of avPlayerLayer, try animating the alpha of the customView where you're adding avPlayerLayer, i.e.

@IBAction func boutonTapped(_ sender: UIButton) {
    UIView.animate(withDuration: 5.0) {
        self.customView.alpha = paused ? 1.0 : 0.0 //here...
        paused ? self.avPlayer.play() : self.avPlayer.pause()
    }
    paused = !paused
}

There is no need to call self.view.layoutIfNeeded().

Upvotes: 1

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