ios 如何以编程方式获取标签栏的高度？
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How to get the height of the tabbar programmatically?
提问by Niels R.
I've found out that the height of a UITabBar is 49px (or 50px, depending on the source).
我发现 UITabBar 的高度是 49px（或 50px，取决于来源）。
Because I don't like to use too much hard-coded values in my code I was wondering if it is possible to retrieve the height of the tabbar programmatically.
因为我不喜欢在我的代码中使用太多的硬编码值，所以我想知道是否可以以编程方式检索标签栏的高度。
Kind regards,
Niels R.
亲切的问候，
尼尔斯 R.
PS: The reason I'm asking is because I have a view controller (with a list view containing text fields) that is either simply pushed by the navigationcontroller (pushViewController) or presented as a modal (presentModalViewController). As soon as the keyboard show up, the size of the view is reduced, but I have to take into account that the tabbar is only visible when the view controller is pushed and not presented as a modal.
PS：我问的原因是因为我有一个视图控制器（带有包含文本字段的列表视图），它要么由导航控制器（pushViewController）简单推送，要么作为模态（presentModalViewController）呈现。键盘一出现，视图的大小就会减小，但我必须考虑到标签栏仅在视图控制器被按下时才可见，而不是作为模态呈现。
回答by Mason
I don't totally understand your P.S., but you can do:
我不完全理解你的 PS，但你可以这样做：
tabBarController?.tabBar.frame.size.height
回答by Federico Jordan
If you want to get the standard height for the UITabBar control then you can do:
如果要获得 UITabBar 控件的标准高度，则可以执行以下操作：
UITabBarController *tabBarController = [UITabBarController new];
CGFloat tabBarHeight = tabBarController.tabBar.frame.size.height;
回答by Nick Ginanto
prettier
更漂亮
CGRectGetHeight(self.tabBarController.tabBar.frame)
回答by Adam Smaka
check this in your vc
在你的 vc 中检查这个
bottomLayoutGuide.length
回答by Cyril
In Swift 3, you can retrieve the height of the UITabBarwith this code below.
在Swift 3，你可以检索的高度UITabBar与下面这段代码。
self.tabBarController!.tabBar.frame.size.height
self.tabBarController!.tabBar.frame.size.height
Which will return a CGFloatvalue of the height
这将返回CGFloat高度的值
回答by Hack Saw
If an object is based on UIView (which most visual elements in the library are), you can get the size from the ivar "frame".
如果对象基于 UIView（库中的大多数视觉元素都是如此），则可以从 ivar“框架”中获取大小。
回答by Jhaliya
UITabBaris inherited from UIViewas long as you mhave access to your UITabBar instance you can access and modify the frame of UITabBar,
UITabBar继承自UIView只要您可以访问您的 UITabBar 实例，您就可以访问和修改 UITabBar 的框架，
CGRect myRect = myTabBar.frame;
