ios在 View 中添加panGesture，更改 View 框架，但不流畅
<p><p> <img src="/image/Jffjb.gif" alt="enter image description here"/> </p>
<p>我给<code>self.view</code>加了一个view，给view加了一个<code>UIPangestureRecognizer</code>， move view，但是不流畅，感觉不流畅，
这是我的代码，谢谢你帮助我</p>
<pre><code>var redView:UIView = UIView();
var redFrame:CGRect = CGRect();
override func viewDidLoad() {
super.viewDidLoad()
redView = UIView.init(frame: CGRect.init(x: 0, y: 100, width: KWidth, height: 40))
redView.backgroundColor = UIColor.red
self.redFrame = redView.frame;
self.view.addSubview(redView);
let pan:UIPanGestureRecognizer = UIPanGestureRecognizer.init(target: self, action: #selector(moveFunction(pan:)))
self.redView.addGestureRecognizer(pan)
}
func moveFunction(pan:UIPanGestureRecognizer) {
let point:CGPoint = pan.translation(in: self.view)
pan.setTranslation(CGPoint.zero, in: self.view)
ifpan.state == .changed{
print(point)
let redY:CGFloat = redView.frame.origin.y + point.y
redView.frame = CGRect.init(x: 0, y: Int(redY), width: KWidth, height: 40)
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>可能此代码对您有所帮助。我正在使用平移手势更改 View(panView) 高度约束。</p>
<pre><code>@IBOutlet weak var h: NSLayoutConstraint!
@IBOutlet weak var panView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
let gesture = UIPanGestureRecognizer(target: self, action: #selector(self.pan(_:)))
panView.addGestureRecognizer(gesture)
}
@objc func pan(_ pan: UIPanGestureRecognizer) {
let translation = pan.translation(in: panView)
if pan.state == .began {
} else if pan.state == .changed {
h.constant = h.constant - translation.y
pan.setTranslation(CGPoint.zero, in: panView)
} else if pan.state == .ended {
// You can handle this how you want.
}
}
</code></pre></p>
<p style="font-size: 20px;">关于ios在 View 中添加panGesture，更改 View 框架，但不流畅，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/41479393/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/41479393/
</a>
</p>
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