ios - 应用 anchor 后 CATransform3DRotate 效果消失

Question

通过正确的观察进行编辑。

我使用以下两个片段来旋转 UIImageView。在 stage1 之后，我得到了想要的 3D 效果: View 旋转(3D 效果)和拉伸(stretch)(更大尺寸)。在 stage2 上，我试图通过右侧的铰链摆动 rightView。

如果我应用更改 anchor 的线， View 会正确摆动(铰链在右侧)，但有一个主要问题: View 的大小恢复到原始大小(较小)，而(旋转)3D 效果仍然完好无损然后摆动发生。

有什么建议吗？

rightView.layer.anchorPoint = CGPointMake(1.0, 0.5); 


-(void)stage1
{
    [UIView animateWithDuration:1.5  animations:^{
        rightView.transform = CGAffineTransformMakeTranslation(0,0);   //rightView i UIImageView
        CATransform3D _3Dt = CATransform3DIdentity;
        _3Dt =CATransform3DMakeRotation(3.141f/42.0f,0.0f,-1.0f,0.0f);  
        _3Dt.m34 = -0.001f;
        _3Dt.m14 = -0.0015f;
        rightView.layer.transform = _3Dt;
    } completion:^(BOOL finished){
        if (finished) {
            NSLog(@"finished..");
        }
    }];
}

-(void)Stage2
{
    rightView.layer.anchorPoint = CGPointMake(1.0, 0.5);   //issue?
    rightView.center = CGPointMake(1012, 384);
    [UIView animateWithDuration:1.75 animations:^{
        CATransform3D rightTransform = rightView.layer.transform;
        rightTransform.m34 = 1.0f/500; 
        rightTransform = CATransform3DRotate(rightTransform, M_PI_2, 0, 1, 0);
        rightView.layer.transform = rightTransform;
    } completion:^(BOOL finished) {
    }];
}

Answer 1

您需要将“选项”添加到带有持续时间的动画并添加 options:UIViewAnimationOptionBeginFromCurrentState

否则从头开始。

所以你的第 2 阶段看起来像这样:

-(void)Stage2
{
    rightView.layer.anchorPoint = CGPointMake(1.0, 0.5);   //issue?
    rightView.center = CGPointMake(1012, 384);
    [UIView animateWithDuration:1.75
                          delay:0.00 
                        options:UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
        CATransform3D rightTransform = rightView.layer.transform;
        rightTransform.m34 = 1.0f/500; 
        rightTransform = CATransform3DRotate(rightTransform, M_PI_2, 0, 1, 0);
        rightView.layer.transform = rightTransform;
    } completion:^(BOOL finished) {
    }];
}