iOS UIView Transition子视图放错了片刻

Question

我正在使用UIView过渡在ViewControllers之间过渡。 过渡完成后，会有一个明显的子视图放错位置，然后在短暂的延迟后得到纠正。

我录制了一个简短的视频片段来说明此问题：

https://drive.google.com/file/d/0B-iP0P7UfFj0dEE3OVN5Q3BTbUU/edit?usp=sharing

请注意滑块，以及按钮标题的潜在外观

这是进行过渡的辅助方法：

#define DURATION_TRANSITION 0.5

+ (void)toVCWithIdentifier:(NSString *)identifier transition:(Transition)transition {
    UIViewAnimationOptions option;
    if (transition == TransitionRootToSub) {
        option = UIViewAnimationOptionTransitionCurlUp;
    }
    else if (transition == TransitionSubToRoot) {
        option = UIViewAnimationOptionTransitionCurlDown;
    }
    else if (transition == TransitionPresent) {
        option = UIViewAnimationOptionTransitionFlipFromBottom;
    }
    else if (transition == TransitionDismiss) {
        option = UIViewAnimationOptionTransitionFlipFromTop;
    }
    else {
        option = UIViewAnimationOptionTransitionCrossDissolve;
    }
    [UIView transitionWithView:[Helper window] duration:DURATION_TRANSITION options:option animations:^{
        [Helper window].rootViewController = [Helper viewControllerWithStoryboardID:identifier];
    } completion:nil];

}



+ (UIViewController *)viewControllerWithStoryboardID:(NSString *)storyboardID {
    if (IS_IPHONE) {
        return [[UIStoryboard storyboardWithName:@"Main_iPhone" bundle:nil] instantiateViewControllerWithIdentifier:storyboardID];
    }
    else {
        return [[UIStoryboard storyboardWithName:@"Main_iPad" bundle:nil] instantiateViewControllerWithIdentifier:storyboardID];
    }

}

我只是打电话要求进行过渡

#define VC_MORE @"MoreViewController" //story board identifier

- (IBAction)setting:(id)sender {
    [Helper toVCWithIdentifier:VC_MORE transition:TransitionRootToSub];
}

在MoreViewController ，我称其为main

#define VC_MAIN @"MainViewController"

- (IBAction)back:(id)sender {
    [Helper toVCWithIdentifier:VC_MAIN transition:TransitionSubToRoot];
}

Answer 1

在-toVCWithIdentifier方法中尝试一下（只需将其放在转换之外）

[Helper window].rootViewController = [Helper viewControllerWithStoryboardID:identifier];
[UIView transitionWithView:[Helper window] duration:DURATION_TRANSITION options:option animations:^{

} completion:nil];