我想无限期地将图像视图旋转360度。
UIView.animate(withDuration: 2, delay: 0, options: [.repeat], animations: {
self.view.transform = CGAffineTransform(rotationAngle: 6.28318530717959)
}, completion: nil)
我该怎么做？
答案 0 :(得分：36)
Swift 2.x无限期地旋转UIView的方式，从早期的答案中编译：
public override void OnActivityCreated(Bundle savedInstanceState)
{
base.OnActivityCreated(savedInstanceState);
/*
var items = new string[] { "Rock","Country", "Dance" };
lst = View.FindViewById<ListView> (Resource.Id.lstGenres);
lst.Adapter = new ArrayAdapter<string>(Activity, Resource.Layout.textViewItems,Resource.Id.textviewItems, items);
//lst = View.FindViewById<ListView> (Resource.Id.lst_genre);
//lst.SetAdapter(new ArrayAdapter<String>(this.Activity, Resource.Layout.GenerFragment, items));
lst.ItemClick+= delegate(object sender, AdapterView.ItemClickEventArgs e) {};*/
var data = new ListItemCollection<ListItemValue> () {
new ListItemValue ("Babbage"),
new ListItemValue ("Boole"),
new ListItemValue ("Berners-Lee"),
new ListItemValue ("Atanasoff"),
new ListItemValue ("Allen"),
new ListItemValue ("Cormack"),
new ListItemValue ("Cray"),
new ListItemValue ("Dijkstra"),
new ListItemValue ("Dix"),
new ListItemValue ("Dewey"),
new ListItemValue ("Erdos"),
};
var sortedContacts = data.GetSortedData ();
var adapter = CreateAdapter (sortedContacts);
ListAdapter = adapter;
}
SeparatedListAdapter CreateAdapter<T> (Dictionary<string, List<T>> sortedObjects)
where T : IHasLabel, IComparable<T>
{
var adapter = new SeparatedListAdapter (this);
foreach (var e in sortedObjects.OrderBy (de => de.Key)) {
var label = e.Key;
var section = e.Value;
adapter.AddSection (label, new ArrayAdapter<T> (this, Resource.Layout.lstGenres, section));
}
return adapter;
}更新Swift 3.x
// Rotate <targetView> indefinitely
private func rotateView(targetView: UIView, duration: Double = 1.0) {
UIView.animateWithDuration(duration, delay: 0.0, options: .CurveLinear, animations: {
targetView.transform = CGAffineTransformRotate(targetView.transform, CGFloat(M_PI))
}) { finished in
self.rotateView(targetView, duration: duration)
}
}
答案 1 :(得分：24)
Swift 3.0
let imgViewRing = UIImageView(image: UIImage(named: "apple"))
imgViewRing.frame = CGRect(x: 0, y: 0, width: UIImage(named: "apple")!.size.width, height: UIImage(named: "apple")!.size.height)
imgViewRing.center = CGPoint(x: self.view.frame.size.width/2.0, y: self.view.frame.size.height/2.0)
rotateAnimation(imageView: imgViewRing)
self.view.addSubview(imgViewRing)
这是动画逻辑
func rotateAnimation(imageView:UIImageView,duration: CFTimeInterval = 2.0) {
let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
rotateAnimation.fromValue = 0.0
rotateAnimation.toValue = CGFloat(.pi * 2.0)
rotateAnimation.duration = duration
rotateAnimation.repeatCount = .greatestFiniteMagnitude
imageView.layer.add(rotateAnimation, forKey: nil)
}
您可以查看此link
中的输出答案 2 :(得分：6)
使用此扩展程序将UIImageView旋转360度。
extension UIView {
func rotate360Degrees(duration: CFTimeInterval = 1.0, completionDelegate: AnyObject? = nil) {
let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
rotateAnimation.fromValue = 0.0
rotateAnimation.toValue = CGFloat(M_PI)
rotateAnimation.duration = duration
if let delegate: CAAnimationDelegate = completionDelegate as! CAAnimationDelegate? {
rotateAnimation.delegate = delegate
}
self.layer.addAnimation(rotateAnimation, forKey: nil)
}
}
比旋转UIImageView简单地使用这个方法
self.YOUR_SUBVIEW.rotate360Degrees()
答案 3 :(得分：5)
我会将其添加到rotateImage()这样的函数中，并在完成代码中再次调用rotateImage()。我认为你应该使用M_PI（或swift等效物）作为旋转量。
答案 4 :(得分：4)
这个在Swift 2.2中为我工作：
let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
rotationAnimation.fromValue = 0.0
rotationAnimation.toValue = 360 * CGFloat(M_PI/180)
let innerAnimationDuration : CGFloat = 1.0
rotationAnimation.duration = Double(innerAnimationDuration)
rotationAnimation.repeatCount = HUGE
self.imageView.addAnimation(rotationAnimation, forKey: "rotateInner")
答案 5 :(得分：3)
针对Swift 3进行了更新： 我对UIView进行了扩展，并在其中包含了以下函数：
func rotate(fromValue: CGFloat, toValue: CGFloat, duration: CFTimeInterval = 1.0, completionDelegate: Any? = nil) {
let rotateAnimation = CABasicAnimation(keyPath: >"transform.rotation")
rotateAnimation.fromValue = fromValue
rotateAnimation.toValue = toValue
rotateAnimation.duration = duration
if let delegate: Any = completionDelegate {
rotateAnimation.delegate = delegate as? CAAnimationDelegate
}
self.layer.add(rotateAnimation, forKey: nil)
}
然后您可以通过（例如我在按钮上制作的UIView）来调用该函数：
monitorButton.rotate(fromValue: 0.0, toValue: CGFloat(M_PI * 2), completionDelegate: self)
希望这有帮助！
答案 6 :(得分：1)
尝试这个适合我的，我旋转图像一次
UIView.animateWithDuration(0.5, delay: 0.0, options: .CurveLinear, animations: {
self.imgViewReload.transform = CGAffineTransformRotate(self.imgViewReload.transform, CGFloat(M_PI))
}, completion: {
(value: Bool) in
UIView.animateWithDuration(0.5, delay: 0.0, options: .CurveLinear, animations: {
self.imgViewReload.transform = CGAffineTransformIdentity
}, completion: nil)
})
答案 7 :(得分：1)
我认为您真正想要的是使用CADisplayLink。原因是，与使用完工模块相比，这将无限平滑，因为完工模块可能会引起轻微的打and并且不那么容易取消。请参阅以下解决方案：
var displayLink : CADisplayLink?
var targetView = UIView()
func beginRotation () {
// Setup display link
self.displayLink = CADisplayLink(target: self, selector: #selector(onFrameInterval(displayLink:)))
self.displayLink?.preferredFramesPerSecond = 60
self.displayLink?.add(to: .current, forMode: RunLoop.Mode.default)
}
func stopRotation () {
// Invalidate display link
self.displayLink?.invalidate()
self.displayLink = nil
}
// Called everytime the display is refreshed
@objc func onFrameInterval (displayLink: CADisplayLink) {
// Get frames per second
let framesPerSecond = Double(displayLink.preferredFramesPerSecond)
// Based on fps, calculate how much target view should spin each interval
let rotationsPerSecond = Double(3)
let anglePerSecond = rotationsPerSecond * (2 * Double.pi)
let anglePerInterval = CGFloat(anglePerSecond / framesPerSecond)
// Rotate target view to match the current angle of the interval
self.targetView.layer.transform = CATransform3DRotate(self.targetView.layer.transform, anglePerInterval, 0, 0, 1)
}
答案 8 :(得分：1)
通过递归调用避免完成闭包！
晚了一点，但是使用UIView keyFrame动画和每个keyFrame的不同旋转阶段，以及设置动画曲线效果很好。这是一个UIView类函数-
do/while看起来很粗糙，旋转角度很奇怪，但是正如op＆others发现的，您不能仅仅告诉它旋转360度
答案 9 :(得分：1)
您可以使用此功能...只需为其提供视图和持续时间
它有两个动画，第一个将视图旋转180°，另一个将其旋转到360°，然后函数调用自身，使其可以无限地继续旋转动画
func infinite360Animation(targetView: UIView, duration: Double) {
UIView.animate(withDuration: duration/2, delay: 0, options: .curveLinear) {
targetView.transform = CGAffineTransform.identity.rotated(by: .pi )
} completion: { (_) in
UIView.animate(withDuration: duration/2, delay: 0, options: .curveLinear) {
targetView.transform = CGAffineTransform.identity.rotated(by: .pi * 2)
} completion: { (_) in
self.infinite360Animation(targetView: targetView, duration: duration)
}
}
}
然后您可以像这样调用函数
infinite360Animatio(targetView: yourView, duration: 3)
答案 10 :(得分：0)
在tabBarController上，请务必设置您的代理并执行以下 didSelect 方法：
func tabBarController(_ tabBarController: UITabBarController,
didSelect viewController: UIViewController) {
if let selectedItem:UITabBarItem = tabBarController.tabBar.selectedItem {
animated(tabBar: tabBarController.tabBar, selectedItem: selectedItem)
}
}
fileprivate func animated(tabBar: UITabBar, selectedItem:UITabBarItem){
if let view:UIView = selectedItem.value(forKey: "view") as? UIView {
if let currentImageView = view.subviews.first as? UIImageView {
rotate(imageView: currentImageView, completion: { (completed) in
self.restore(imageView: currentImageView, completion: nil)
})
}
}
}
fileprivate func rotate(imageView:UIImageView, completion:((Bool) ->Void)?){
UIView.animate(withDuration: animationSpeed, delay: 0.0, options: .curveLinear, animations: {
imageView.transform = CGAffineTransform.init(rotationAngle: CGFloat.pi)
}, completion: {
(value: Bool) in
completion?(value)
})
}
fileprivate func restore(imageView:UIImageView, completion:((Bool) ->Void)?){
UIView.animate(withDuration: animationSpeed, delay: 0.0, options: .curveLinear, animations: {
imageView.transform = CGAffineTransform.identity
}, completion: {
(value: Bool) in
completion?(value)
})
}