如何将UIView从右上角开始旋转90度？

Question

我一直在寻找几小时试图找到一种方法来从右上角90度动画/旋转UIView。

效果应该几乎像从屏幕顶部的摆动门一样工作。

希望有人能帮助！

Answer 1

所以我按下后进入我突然把两个和两个在一起，并认为节拍器样品工作有点像一个摇摆门，这导致了我一些其他的可能性。

这里是我的解决方案：

- (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]; 
} 

希望这有助于别人呢！

Answer 2

您应该尝试将图层的锚点设置为（0,1），然后设置图层的动画效果。

Answer 3

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]; 

}