ios - UITabBarController 图标在触摸时改变高度

Question

我的 UITabBarController 有问题，如果我将手指放在图标上并向上或向下拖动，图标会改变大小，它们会因我的拖动操作而失去高度，我该如何阻止？

这是我的代码:

override func viewWillAppear(_ animated: Bool) {
   .................

    vc_friends.tabBarItem.imageInsets   = UIEdgeInsets(top: 6, left: 0, bottom: -5, right: 0)
    vc_topCharts.tabBarItem.imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: -5, right: 0)
    vc_newsfeed.tabBarItem.imageInsets  = UIEdgeInsets(top: 6, left: 0, bottom: -5, right: 0)
    vc_myProfile.tabBarItem.imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: -5, right: 0)
    vc_pools.tabBarItem.imageInsets     = UIEdgeInsets(top: 6, left: 0, bottom: -5, right: 0)

    self.viewControllers = [vc_friends,vc_topCharts,vc_newsfeed,vc_pools,vc_myProfile]

    self.selectedIndex = 2
}

它是这样的:

...如果我点击它并将手指放在它上面并向上或向下移动我的手指:

Answer 1

当您的负值与另一个方向的正值不相反时，这是一个已知问题。将您的插图更改为:

UIEdgeInsets(top: 6, left: 0, bottom: -6, right: 0)