ios - UILongPressGestureRecognizer 在状态改变时继续动画

Question

我在 UIImageView 上添加了一个 UILongPressGestureRecognizer。它的目的是如果用户按下图像动画应该开始。这是完美的。但是一旦用户稍微移动他的手指，动画就会停止。我知道发生这种情况是因为状态发生了变化。但是我想继续动画，只有当用户从图像上移开他的手指时才停止。

到目前为止，我添加手势识别器的代码是

let tapGestureRecognizer = UILongPressGestureRecognizer(target:self, action:Selector("imageTapped:"))
    tapGestureRecognizer.minimumPressDuration = 0
    barcodeImage.userInteractionEnabled = true
    barcodeImage.addGestureRecognizer(tapGestureRecognizer)

动画的代码是

func imageTapped(gesture: UILongPressGestureRecognizer)
{
    let animation : CATransition  = CATransition()
    animation.delegate = self
    animation.duration = 2.5
    animation.repeatCount = Float.infinity
    animation.type = "rippleEffect"
    if(gesture.state == UIGestureRecognizerState.Ended){
        logger.log("press ended");
        // and stop animation
        barcodeImage.layer.removeAllAnimations()
    }else{
        logger.log("show animation")
        barcodeImage.layer.addAnimation(animation, forKey: nil)
    }
}

当状态改变时如何继续动画？

Answer 1

barcodeImage.userInteractionEnabled = true

---

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

    if (touches.first?.view == barcodeImage) {
        print("show animation")
    }
}

override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
    print("removeAllAnimations")
}

override func touchesCancelled(touches: Set<UITouch>?, withEvent event: UIEvent?) {
    print("removeAllAnimations")
}