Swift 调用 setNavigationBarHidden 但视图不会移动到顶部 [英] Swift calling setNavigationBarHidden but view wont move to top

问题描述

我在滚动时隐藏了导航栏:self.navigationController?.setNavigationBarHidden(true, animation: true)

I am hiding my navigation bar when I scroll by calling: self.navigationController?.setNavigationBarHidden(true, animated: true)

唯一的问题是导航栏不会一直隐藏.

The only problem is that the navbar doesnt get hidden all the way.

更奇怪的是，如果我推到一个新的 VC 并返回，现在尝试滚动导航栏一直隐藏，这正是我想要的.

Whats even stranger is if I push to a new VC and go back and now try to scroll the navigation bar gets hidden all the way which is what I want.

如果重要的话，我会在 VC2 上隐藏导航栏，然后在退出回到 VC 1 时显示它.

If it matters I am hiding the navigation bar on VC2 then showing it when I exit back to VC 1.

这是我第一次尝试隐藏导航栏时的样子，它不会一直向上/底层视图显示太多.

This is what it looks when I try to hide the navbar first time, it doesnt go up all the way/underlying view showing too much.

如果我将其推到下一个 VC 并返回并尝试隐藏导航栏，它会起作用

If I push the to next VC and go back and now try to hide the navigationbar it works

我的视图对顶部布局有 0 约束，因此它紧贴顶部

The my view has a constraint of 0 to top layout so its hugging the top

那么如何在隐藏导航栏时让我的视图始终像第二张图片中的一样?

So how can I make my view always be like in the second image when hiding my navigation bar?

推荐答案

试试这个代码...

注意:这是解决您问题的简单方法.如果您想要更多自定义外观导航栏和状态栏外观.您应该阅读我之前的评论...

Note: This is a simple approach for your problem. If you want more custom look navBar and status bar look .You should read my previous comment...

设置导航控制器属性 hidesBarsOnSwipe 为 true

Set navigation controller property hidesBarsOnSwipe to true

     override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)

navigationController?.hidesBarsOnSwipe = true

}

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