[英]iOS how can I make undo action for rotating, scaling and adding UIView to UIIMageView
[英]How to animate UIView transform sequence like scaling then rotating in iOS?
我想知道如何制作UIView動畫,首先縮放尺寸並旋轉該尺寸而不是原始尺寸旋轉?
我已經嘗試了很多方法,比如在完成UIView動畫時包裝UIView動畫,使用UIView animateKeyframes等等。
但是,我無法完美地構建動畫,請給我提示或關鍵詞來搜索,謝謝!
這應該根據您的要求工作(如何制作首先縮放尺寸並旋轉該尺寸而不是在原始尺寸上旋轉的UIView動畫?)
@IBOutlet var scaleRotateImage: UIImageView!
func scaleNTransform() -> Void {
scaleRotateImage.layer.cornerRadius = scaleRotateImage.frame.size.height/2.0
scaleRotateImage.clipsToBounds = true
let scaleTransform = CGAffineTransform(scaleX: 3.0, y: 3.0) // Scale
let rotateTransform = CGAffineTransform(rotationAngle: CGFloat.pi) // Rotation
let hybridTransform = scaleTransform.concatenating(rotateTransform) // Both Scale + Rotation
// Outer block of animation
UIView.animate(withDuration: 5.0, animations: {
self.scaleRotateImage.transform = scaleTransform
self.view.layoutIfNeeded()
}) { (isCompleted) in
// Nested block of animation
UIView.animate(withDuration: 5.0, animations: {
self.scaleRotateImage.transform = hybridTransform
self.view.layoutIfNeeded()
})
}
}
結果
你可以做點什么,
定義弧度以將度數轉換為弧度
#define RADIANS(degrees) (((degrees) * M_PI) / 180.0)
然后在你的viewDidAppear
,
-(void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
CGAffineTransform leftTransform = CGAffineTransformRotate(CGAffineTransformIdentity, RADIANS(-10.0));
CGAffineTransform rightTransform = CGAffineTransformRotate(CGAffineTransformIdentity, RADIANS(10.0));
_myView.transform = leftTransform; //Here `_myView` is the your view on which you want animations!
[UIView beginAnimations:@"youCanSetAnimationIdHere" context:(__bridge void * _Nullable)(_myView)];
[UIView setAnimationRepeatAutoreverses:YES];
[UIView setAnimationRepeatCount:5];
[UIView setAnimationDuration:0.25];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationCompletedWithAnimationId:isCompleted:view:)];
_myView.transform = rightTransform;
[UIView commitAnimations];
}
你的animationCompletedWithAnimationId
方法應該是這樣的,
- (void) animationCompletedWithAnimationId:(NSString *)animationID isCompleted:(NSNumber *)isCompleted view:(UIView *)view
{
if ([isCompleted boolValue]) {
UIView *myView = view;
myView.transform = CGAffineTransformIdentity;
}
}
結果是
您可以根據您的要求更改重復次數和弧度!
希望您已經實現縮放或搖動您的UIButton
,此代碼將指導您使UIView
動畫序列重復和自動反轉。
btn.frame = frame1;
[UIView animateKeyframesWithDuration:2.0 delay:0.0 options:UIViewKeyframeAnimationOptionAutoreverse | UIViewKeyframeAnimationOptionRepeat animations:^{
[UIView addKeyframeWithRelativeStartTime:0.0 relativeDuration:0.5 animations:^{
// Your changes to the UI, eg. scale UIButton up 300 points
btn.frame = frame2;
}];
[UIView addKeyframeWithRelativeStartTime:0.5 relativeDuration:0.5 animations:^{
// Your changes to the UI, eg. rotate or shake UIButton
}];
} completion:nil];
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