我有一个竖起大拇指的形象。当用户点击它时,我将图像上下颠倒(如拇指向下)。然后,当他再次点击按钮时,我将其旋转回到竖起位置。但是当图像旋转回到竖起位置时,它会移动得非常快。我想让它在我顺时针180位置的持续时间内。
我如何做的虚拟代码
@IBOutlet var likeButton: UIButton!
@IBOutlet var likeCountLabel: UILabel!
var counter = 0
var count = 10
@IBAction func likeButton(sender: UIButton)
{
let anim = CABasicAnimation(keyPath: "transform.rotation")
if counter == 0
{
anim.fromValue = M_PI
anim.toValue = 0
anim.additive = true
anim.duration = 0.50
likeButton.layer.addAnimation(anim, forKey: "rotate")
likeButton.transform = CGAffineTransformMakeRotation(CGFloat(-M_PI))
count -= 1
likeCountLabel.text = "\(count)"
counter = 1
}
else if counter == 1
{
anim.fromValue = M_PI
anim.toValue = 0
anim.additive = true
anim.duration = 0.50
likeButton.transform = CGAffineTransformMakeRotation(CGFloat(M_PI*2))
count += 1
likeCountLabel.text = "\(count)"
counter = 0
}
答案 0 :(得分:1)
在第二部分中,您错过了将动画添加到按钮中。
likeButton.layer.addAnimation(anim, forKey: "rotate")