如何以編程方式在iPhone中按360度旋轉按鈕？

Question

按鈕如何在360秒的時間內旋轉30秒，之後按鈕停止旋轉。根據需要

Answer 1

360度旋轉動畫只是Core Animation的幾行代碼。

CABasicAnimation *rotate = 
    [CABasicAnimation animationWithKeyPath:@"transform.rotation"]; 
rotate.byValue = @(M_PI*2); // Change to - angle for counter clockwise rotation 
rotate.duration = 30.0; 

[yourButton.layer addAnimation:rotate 
         forKey:@"myRotationAnimation"]; 

通過使用byValue財產你正在做360度旋轉什麼是有一個相對旋轉之前（相對於顯式指定從和值）。這意味着即使已經旋轉了，上面的代碼也會將按鈕旋轉360度。所有明確指定結束轉換的答案都假定該按鈕尚未旋轉。

上面的例子儘可能小地做你剛纔所要求的（「360度旋轉，持續時間30秒」）。如果你想有更多的控制，你可以選擇做動畫的開始和/或通過指定計時功能慢慢停止

rotate.timingFunction = 
    [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; 

---

如果您尚未添加QuarzCore.framework到你的項目，你需要做的所以。另外#import <QuartzCore/QuartzCore.h>在您的源文件的頂部。

Answer 2

[UIView animateWithDuration:.30f animations:^{ 
    btnGallery.transform = CGAffineTransformRotate(CGAffineTransformIdentity, -M_PI); 
}]; 

Answer 3

CATransform3D myRotationTransform = CATransform3DRotate(Yourbutton.layer.transform, -1, 0.0, 0.0, 1.0); 
Yourbutton.layer.transform = myRotationTransform; 

CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"]; 
animation.fromValue = [NSNumber numberWithFloat:0.0f]; 
animation.toValue = [NSNumber numberWithFloat: -1]; 
animation.duration = 30; 
animation.repeatCount = 1; 
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; 
[Yourbutton.layer addAnimation:animation forKey:@"MyAnimation"]; 

應該努力！不要忘記包含quartz.framework！

Answer 4

好吧，我只是用

被self.buttonImageView你需要旋轉ImageView的。

[UIView animateKeyframesWithDuration:0.5 delay:0 options:UIViewKeyframeAnimationOptionCalculationModeLinear animations:^{ 

    [UIView addKeyframeWithRelativeStartTime:0.0 relativeDuration:0.25 animations:^{ 
     self.buttonImageView.transform= CGAffineTransformMakeRotation(M_PI); 
    }]; 

    [UIView addKeyframeWithRelativeStartTime:0.5 relativeDuration:0.25 animations:^{ 
     self.buttonImageView.transform= CGAffineTransformMakeRotation(-2* M_PI); 
    }]; 


} completion:^(BOOL finished) { 

    [self.map setCenterCoordinate:self.map.userLocation.location.coordinate animated:YES]; 
    self.buttonImageView.transform= CGAffineTransformMakeRotation(2* M_PI); 
}];