iOS11滚动偏移-过渡问题

Question

I am working on an app where after iOS 11 a custom flip-card transition is not working correctly. If you look at the GIF below (purposely slow animation) you can see that the card is not correctly placed on the return-flip, and afterwards "clicks" into place. With iOS 10 and below this doesn't happen. It returns to its original place without the click.

I have looked into the new contentInsetAdjustmentBehaviour and set this to .never to avoid the space between the cards and status bar on top. This however did not solve the problem.

if (@available(iOS 11.0, *)) {
    self.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
    self.navigationController.navigationBar.prefersLargeTitles = NO;
    self.navigationController.navigationItem.largeTitleDisplayMode = UINavigationItemLargeTitleDisplayModeNever;
}

Does anyone have any idea of where I should look to fix this problem?

UPDATE HACK

I looked at the transition and where the center of the transition is determined. Here I made a small hack for iOS 11 that moved the center 64 points for iPhone 8+ and below and 88 points for iPhone X. But only when I had not started scrolling yet. If I scrolled the center was moved 44 points on all iPhone models. See temporary solution below:

CGPoint targetCenterInContainer = CGPointMake(CGRectGetMidX(newCardFrame), CGRectGetMidY(newCardFrame));

if (@available(iOS 11.0, *)) {

    double offset = newCardFrame.origin.y - originalCardFrame.origin.y;

    if (offset == 64) {
        targetCenterInContainer.y -= 64; // For iPhone 8 Plus and below, with no scroll offset
    } else if (offset == 88) {
        targetCenterInContainer.y -= 88; // For iPhone X, with no scroll offset
    } else {
        targetCenterInContainer.y -= 44; // For when there are scroll offset, all iPhones
    }
}

This works okay, but not 100%.

Answer 1

我的应用程序中的所有动画都遇到了类似的问题，转换后某些组件的位置不正确，所以我的建议是禁用ios 11版本的动画，我的意思是将动画值设置为false，直到苹果解决所有这些问题。