iphone - 背景中有 CATransition 白色闪光？

Question

我正在尝试使 pushViewController 从左侧而不是右侧滑入，如下所示:

Page14Controller * controller = [[Page14Controller alloc] initWithNibName:@"Page14Controller" bundle:nil];

CATransition* transition = [CATransition animation];
transition.duration = 0.3;
transition.type = kCATransitionPush;
//                transition.type = kCATransitionMoveIn; 
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
//kCATransitionMoveIn; //, kCATransitionPush, kCATransitionReveal, kCATransitionFade
transition.subtype = kCATransitionFromLeft; 
//kCATransitionFromLeft, kCATransitionFromRight, kCATransitionFromTop, kCATransitionFromBottom
[self.navigationController.view.layer addAnimation:transition forKey:nil];

[self.navigationController pushViewController:controller animated:NO];

当我执行此操作时，当前 Controller 逐渐变为白色，这看起来很糟糕。为什么会这样？我试过将当前 View 的 alpha 背景设置为 0。

Answer 1

我弄清楚了导致白色闪光的明显原因:它是主窗口的背景。将其设置为 alpha=0 有助于白色效果。它appears that kCATransitionPush actually fades the view being pushed off screen ，很明显，如果它下面是绿色的，那么它就会褪色为绿色。如果它不褪色就好了，但这是另一个问题。