ios - 使用 CATransform3DMakeRotation 平滑水平翻转

Question

我设置了以下动画以在不同大小的 View 之间旋转。随着新的、更高的 View 进入视野，动画的中点似乎有一个闪烁。我可以做些什么来顺利过渡。

newView.layer.transform = CATransform3DMakeRotation(M_PI_2, 0.0, 1.0, 0.0);

[UIView animateWithDuration:0.5
                          delay:0
                        options:UIViewAnimationOptionCurveLinear
                     animations:^{oldView.layer.transform = CATransform3DMakeRotation(M_PI_2, 0.0, -1.0, 0.0);}
                     completion:^(BOOL finished) {

                         [oldView removeFromSuperview];
                         [UIView animateWithDuration:0.5
                                               delay:0
                                             options:UIViewAnimationOptionCurveLinear
                                          animations:^{newView.layer.transform = CATransform3DMakeRotation(M_PI_2, 0.0, 0.0, 0.0);}
                                          completion:nil];

    }];

Answer 1

多亏了这个帖子，我才开始工作，所以我想我应该分享我使用 m34 矩阵进行的 3D 转换。

    UIView *toView = // show this
    UIView *fromView = // hide this one

    // set up from
    CATransform3D fromViewRotationPerspectiveTrans = CATransform3DIdentity;
    fromViewRotationPerspectiveTrans.m34 = -0.003; // 3D ish effect
    fromViewRotationPerspectiveTrans = CATransform3DRotate(fromViewRotationPerspectiveTrans, M_PI_2, 0.0f, -1.0f, 0.0f);

    // set up to
    CATransform3D toViewRotationPerspectiveTrans = CATransform3DIdentity;
    toViewRotationPerspectiveTrans.m34 = -0.003;
    toViewRotationPerspectiveTrans = CATransform3DRotate(toViewRotationPerspectiveTrans, M_PI_2, 0.0f, 1.0f, 0.0f);

    toView.layer.transform = toViewRotationPerspectiveTrans;

    [UIView animateWithDuration:1.0
                          delay:0
                        options:UIViewAnimationOptionCurveLinear
                     animations:^{fromView.layer.transform = fromViewRotationPerspectiveTrans; }
                     completion:^(BOOL finished) {

                         [fromView removeFromSuperview];
                         [UIView animateWithDuration:1.0
                                               delay:0
                                             options:UIViewAnimationOptionCurveLinear
                                          animations:^{toView.layer.transform = CATransform3DMakeRotation(M_PI_2, 0.0, 0.0, 0.0);}
                                          completion:nil];

                     }];