3D旋转动画

@implementation UIView (****)

- (void)3dBackgroundAnimation:(BOOL)show duration:(CGFloat)duration
{
    
    if (show) {
    
        CGFloat x = self.center.x;
        CGFloat y = self.frame.origin.y;
        self.layer.anchorPoint = CGPointMake(0.5, 0);
        self.layer.position = CGPointMake(x, y);
        
        //起始值
        CATransform3D fromValue = CATransform3DIdentity;
        fromValue.m34 = -1.f / 300;
        fromValue = CATransform3DRotate(fromValue, 0, 1, 0, 0);
        
        // 结束值
        CATransform3D toValue = CATransform3DIdentity;
        toValue.m34 = -1.f / 300;
        toValue = CATransform3DRotate(toValue, 25.f, 1, 0, 0);
        
        // 添加3D动画
        CABasicAnimation *transform3D = [CABasicAnimation animationWithKeyPath:@"transform"];
        transform3D.duration  = duration;
        transform3D.fromValue = [NSValue valueWithCATransform3D:fromValue];
        transform3D.toValue   = [NSValue valueWithCATransform3D:toValue];
        self.layer.transform  = toValue;
        [self.layer addAnimation:transform3D forKey:@"transform3D"];
    }
    else {
    
        CABasicAnimation *transform3D = [CABasicAnimation animationWithKeyPath:@"transform"];
        transform3D.duration  = duration;
        CATransform3D toValue = CATransform3DIdentity;
        toValue = CATransform3DRotate(toValue, 0, 1, 0, 0);
        self.layer.transform  = toValue;
        [self.layer addAnimation:transform3D forKey:@"transform3D"];
    }
}

@end