动画旋转的UIImageView

Question

我想左/约10度旋转UIImageView正确的，但有一个平滑的动画，而不是一个急转弯，我看到使用：

player.transform = CGAffineTransformMakeRotation(angle) 

赞赏任何帮助，谢谢。

Answer 1

我使用一些这样的代码，以实现类似的效果（虽然我通过旋转360度的话）：

CABasicAnimation *rotate; 
rotate = [CABasicAnimation animationWithKeyPath:@"transform.rotation"]; 
rotate.fromValue = [NSNumber numberWithFloat:0]; 
rotate.toValue = [NSNumber numberWithFloat:deg2rad(10)]; 
rotate.duration = 0.25; 
rotate.repeatCount = 1; 
[self.view.layer addAnimation:rotate forKey:@"10"]; 

我使用代码非常相似，此旋转的图像视图。

Answer 2

[UIView beginAnimations:nil context:NULL]; 
[UIView setAnimationDuration:0.25]; // Set how long your animation goes for 
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; 

player.transform = CGAffineTransformMakeRotation(angle); // if angle is in radians 

// if you want to use degrees instead of radians add the following above your @implementation 
// #define degreesToRadians(x)(x * M_PI/180) 
// and change the above code to: player.transform = CGAffineTransformMakeRotation(degreesToRadians(angle)); 

[UIView commitAnimations]; 

// The rotation code above will rotate your object to the angle and not rotate beyond that. 
// If you want to rotate the object again but continue from the current angle, use this instead: 
// player.transform = CGAffineTransformRotate(player.transform, degreesToRadians(angle)); 

Answer 3

我有一些代码旋转360度：

- (void) runSpinAnimationOnView:(UIView*)view duration:(CGFloat)duration rotations:(CGFloat)rotations repeat:(float)repeat; 
{ 
    CABasicAnimation* rotationAnimation; 
    rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"]; 
    rotationAnimation.toValue = [NSNumber numberWithFloat: rotations * 2.0 /* full rotation*/ * rotations * duration ]; 
    rotationAnimation.duration = duration; 
    rotationAnimation.cumulative = YES; 
    rotationAnimation.repeatCount = repeat; 
    [view.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"]; 
} 

调用它：如果你想旋转

- (void)rotateImage:(UIImageView *)image duration:(NSTimeInterval)duration delay:(NSTimeInterval)delay 
       curve:(int)curve rotations:(CGFloat)rotations 
{ 
    [UIView animateWithDuration:duration 
          delay:delay 
         options:0 
        animations:^{ 
         [UIView setAnimationCurve:curve]; 
         image.transform = CGAffineTransformMakeRotation(rotations); 

        } 
        completion:^(BOOL finished){ 
         [self rotateImage2:image duration:duration delay:delay curve:curve rotations:rotations]; 
         ; 
        }]; 
    [UIView commitAnimations]; 

} 
- (void)rotateImage2:(UIImageView *)image duration:(NSTimeInterval)duration delay:(NSTimeInterval)delay 
       curve:(int)curve rotations:(CGFloat)rotations 
{ 
    [UIView animateWithDuration:duration 
          delay:delay 
         options:0 
        animations:^{ 
         [UIView setAnimationCurve:curve]; 
         image.transform = CGAffineTransformMakeRotation(-rotations); 
        } 
        completion:^(BOOL finished){ 
         [self rotateImage:image duration:duration delay:delay curve:curve rotations:rotations]; 
         ; 
        }]; 
    [UIView commitAnimations]; 

} 

：[self runSpinAnimationOnView:imgView duration:0.1 rotations:M_PI_4 repeat:10];

和动画旋转一定程度，再大约10度的左右视图 致电：[self rotateImage:imgView duration:0.7 delay:0.0 curve:UIViewAnimationCurveEaseIn rotations:(M_PI/18)]; 类似，一些辈分

Answer 4

现代Swift解决方案，使用NSTimer和CGAffineTransformMakeRotation：

class Rotation: UIViewController { 
    var timer = NSTimer() 
    var rotAngle: CGFloat = 0.0 

    @IBOutlet weak var rotationImage: UIImageView! 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     activateTimer() 
    } 

    func activateTimer() { 
     //(1) 
     timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target:self, selector:#selector(Rotation.updateCounter), userInfo: nil, repeats: true) 
    } 

    func updateCounter() { 
     //(2) 
     var rotateLeft: Bool = true 
     if rotateLeft { 
     rotAngle -= 30.0 
     } else { 
     rotAngle += 30.0 
     } 
     //(3) 
     UIView.animateWithDuration(2.0, animations: { 
     self.rotationImage.transform = CGAffineTransformMakeRotation((self.rotAngle * CGFloat(M_PI))/180.0) 
     }) 
    } 
} 

事情需要注意：

• 连接插座上的UIImageView

• 播放（1）定时器节奏，（2）动画节奏和（3）r选择角度以获得理想的结果。这组变量对我有用。

Answer 5

转换为斯威夫特3/4：

let animation = CABasicAnimation(keyPath: "transform.rotation") 
animation.fromValue = 0 
animation.toValue = Double.pi * 2.0 
animation.duration = 2 
animation.repeatCount = .infinity 
animation.isRemovedOnCompletion = false 

imageView.layer.add(animation, forKey: "spin")