ios layer 动画－（transform.rotation篇）

x轴旋转：

CABasicAnimation *theAnimation;
theAnimation=[CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
theAnimation.duration=;
theAnimation.removedOnCompletion = YES;
theAnimation.fromValue = [NSNumber numberWithFloat:];
theAnimation.toValue = [NSNumber numberWithFloat:3.1415926];
 [yourView.layer addAnimation:theAnimation forKey:@"animateTransform"];

y轴旋转：

CABasicAnimation *theAnimation;
theAnimation=[CABasicAnimation animationWithKeyPath:@"transform.rotation.y"];
theAnimation.duration=;
theAnimation.removedOnCompletion = YES;
theAnimation.fromValue = [NSNumber numberWithFloat:];
theAnimation.toValue = [NSNumber numberWithFloat:3.1415926];
 [yourView.layer addAnimation:theAnimation forKey:@"animateTransform"];

z轴旋转：

CABasicAnimation *theAnimation;
theAnimation=[CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
theAnimation.duration=;
theAnimation.removedOnCompletion = YES;
theAnimation.fromValue = [NSNumber numberWithFloat:];
theAnimation.toValue = [NSNumber numberWithFloat:3.1415926];
 [yourView.layer addAnimation:theAnimation forKey:@"animateTransform"];

以上缩放是以view的中心点为中心缩放的，如果需要自定义缩放点，可以设置卯点：
//中心点

[yourView.layer setAnchorPoint:CGPointMake(0.5, 0.5)];

//左上角

[yourView.layer setAnchorPoint:CGPointMake(, )];

//右下角

[yourView.layer setAnchorPoint:CGPointMake(, )];

可设参数：

theAnimation.repeatCount = 0;
theAnimation.autoreverses = NO;

旋转的另一种实现：（以下代码绕z轴旋转180度）

    [self.topViewController.view.layer setAnchorPoint:CGPointMake(0.5, 0.5)];
    [self.topViewController.view.layer setTransform:CATransform3DMakeRotation(, , , )];
    [UIView animateWithDuration: delay:0.0f options:UIViewAnimationOptionAllowUserInteraction | UIViewAnimationCurveEaseIn animations:^{
        [self.topViewController.view.layer setTransform:CATransform3DMakeRotation(3.1415926, , , )];
    } completion:^(BOOL finished) {
    }];