ios 如何从右上角动画/旋转 UIView 90 度？
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How do I animate/rotate a UIView 90 degress from its upper right corner?
提问by dandax
I've been searching for hours trying to find a way to animate/rotate a UIView 90 degrees from the upper right corner.
我已经搜索了几个小时，试图找到一种从右上角动画/旋转 UIView 90 度的方法。
The effect should almost work like a swinging door from the top of the screen.
效果应该几乎像屏幕顶部的旋转门一样。
Hope someone can help!
希望有人能帮忙！
回答by dandax
So right after I pressed enter I suddenly put two and two together and figured the Metronome sample worked kind of like a swinging door and that led me to a few other possibilities.
所以在我按下 Enter 键后，我突然将两个和两个放在一起，发现节拍器样本的工作方式有点像一扇旋转门，这让我想到了其他一些可能性。
Here's my solution:
这是我的解决方案：
- (void)viewDidLoad {
[super viewDidLoad];
// Set the anchor point and center so the view swings from the upper right
swingView.layer.anchorPoint = CGPointMake(1.0, 0.0);
swingView.center = CGPointMake(CGRectGetWidth(self.view.bounds), 0.0);
// Rotate 90 degrees to hide it off screen
CGAffineTransform rotationTransform = CGAffineTransformIdentity;
rotationTransform = CGAffineTransformRotate(rotationTransform, DegreesToRadians(90));
swingView.transform = rotationTransform;
}
...
- (void)animateSwing {
CGAffineTransform swingTransform = CGAffineTransformIdentity;
swingTransform = CGAffineTransformRotate(swingTransform, DegreesToRadians(0));
[UIView beginAnimations:@"swing" context:swingView];
[UIView setAnimationDuration:0.25];
swingView.transform = swingTransform;
[UIView commitAnimations];
}
Hope this helps someone else too!
希望这对其他人也有帮助！
回答by tadejsv
You should try setting the anchor point of the layer to (0,1), and than animate the layer.
您应该尝试将图层的锚点设置为 (0,1)，然后为图层设置动画。
回答by nghiamas
You should try this code:
你应该试试这个代码：
-(void)doRotationView{
[UIView beginAnimations:@"flipping view" context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft
forView:self cache:YES];
if (flagFront == 1) {
flagFront =0;
[self.viewSecond setHidden:NO];
[self.viewFirst setHidden:YES];
}
else{
flagFront =1;
[self.viewSecond setHidden:YES];
[self.viewFirst setHidden:NO];
}
[UIView commitAnimations];
}
}
