blocks|key|756632|text|在按钮的操作方法中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|756633|[self.tabBarController.tabBar+setHidden:YES];|code-block|syntax|javascript|756634|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In your action method for the button:

<pre><code>[self.tabBarController.tabBar setHidden:YES];
</code></pre>

blocks|key|756658|text|您可以推送模式视图控制器|type|unstyled|depth|inlineStyleRanges|entityRanges|data|756659|[self+presentModalViewController:myFullscreenViewController+animated:YES];|code-block|syntax|javascript|756660|这将在当前视图上创建一个全新的全屏视图。|756661|使用dismissModalViewController:animated:解除ist|offset|length|style|CODE|756662|entityMap^0|0|0|0|2|10|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@$K|U|L|V|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

you can push a modal view controller

<pre><code>[self presentModalViewController:myFullscreenViewController animated:YES];
</code></pre>

this will create a completely new view fullscreen above your current one.

dismiss ist with <code>dismissModalViewController:animated:</code>

blocks|key|756695|text|Saurabh上面的答案可以扩展到也适用于横向：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|756696|%2B+(void)+hideTabBar:(UITabBarController+*)+tabbarcontroller+{

++++[UIView+beginAnimations:nil+context:NULL];
++++[UIView+setAnimationDuration:0.5];

++++//Support+for+landscape+views
++++int+orientation+=+[[UIDevice+currentDevice]+orientation];
++++int+x_pos+=+480;
++++if+(orientation+==+UIInterfaceOrientationLandscapeLeft+%7C%7C+orientation+==+UIInterfaceOrientationLandscapeRight)+{
++++++++x_pos+=+320;
++++}

++++for(UIView+*view+in+tabbarcontroller.view.subviews)
++++{
++++++++if([view+isKindOfClass:[UITabBar+class]])
++++++++{
++++++++++++[view+setFrame:CGRectMake(view.frame.origin.x,+x_pos,+view.frame.size.width,+view.frame.size.height)];
++++++++}+
++++++++else+
++++++++{
++++++++++++[view+setFrame:CGRectMake(view.frame.origin.x,+view.frame.origin.y,+view.frame.size.width,+x_pos)];
++++++++}+++++++
++++}+++
++++[UIView+commitAnimations];+
}|code-block|syntax|javascript|756697|`|756698|showTabBar()对应的x_pos编号是431和271。|offset|length|style|CODE|756699|entityMap^0|0|0|0|N|3|R|3|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@$K|U|L|V|M|N]|$K|W|L|X|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

Saurabh's answer above can be extended to also work in landscape orientation:

<pre><code>+ (void) hideTabBar:(UITabBarController *) tabbarcontroller {

 [UIView beginAnimations:nil context:NULL];
 [UIView setAnimationDuration:0.5];

 //Support for landscape views
 int orientation = [[UIDevice currentDevice] orientation];
 int x_pos = 480;
 if (orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight) {
 x_pos = 320;
 }

 for(UIView *view in tabbarcontroller.view.subviews)
 {
 if([view isKindOfClass:[UITabBar class]])
 {
 [view setFrame:CGRectMake(view.frame.origin.x, x_pos, view.frame.size.width, view.frame.size.height)];
 } 
 else 
 {
 [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, x_pos)];
 } 
 } 
 [UIView commitAnimations]; 
}
</code></pre>

`

The corresponding x_pos numbers for showTabBar() are <code>431</code> and <code>271</code>.

blocks|key|972264|text|修改了Setomidor的答案，以便同时适用于横向、纵向和iPad+(+320和480值仅适用于iPhone)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972265|-+(void)+hideTabBar:(UITabBarController+*)+tabbarcontroller+
{
++++CGRect+screenRect+=+[[UIScreen+mainScreen]+bounds];

++++[UIView+beginAnimations:nil+context:NULL];
++++[UIView+setAnimationDuration:0.5];
++++float+fHeight+=+screenRect.size.height;
++++if(++UIDeviceOrientationIsLandscape([UIApplication+sharedApplication].statusBarOrientation)+)
++++{
++++++++fHeight+=+screenRect.size.width;
++++}

++++for(UIView+*view+in+tabbarcontroller.view.subviews)
++++{
++++++++if([view+isKindOfClass:[UITabBar+class]])
++++++++{
++++++++++++[view+setFrame:CGRectMake(view.frame.origin.x,+fHeight,+view.frame.size.width,+view.frame.size.height)];
++++++++}+
++++++++else+
++++++++{
++++++++++++[view+setFrame:CGRectMake(view.frame.origin.x,+view.frame.origin.y,+view.frame.size.width,+fHeight)];
++++++++++++view.backgroundColor+=+[UIColor+blackColor];
++++++++}
++++}
++++[UIView+commitAnimations];
}



-+(void)+showTabBar:(UITabBarController+*)+tabbarcontroller+
{+++
++++CGRect+screenRect+=+[[UIScreen+mainScreen]+bounds];
++++float+fHeight+=+screenRect.size.height+-+tabbarcontroller.tabBar.frame.size.height;

++++if(++UIDeviceOrientationIsLandscape([UIApplication+sharedApplication].statusBarOrientation)+)
++++{
++++++++fHeight+=+screenRect.size.width+-+tabbarcontroller.tabBar.frame.size.height;
++++}

++++[UIView+beginAnimations:nil+context:NULL];
++++[UIView+setAnimationDuration:0.5];
++++for(UIView+*view+in+tabbarcontroller.view.subviews)
++++{+++
++++++++if([view+isKindOfClass:[UITabBar+class]])
++++++++{
++++++++++++[view+setFrame:CGRectMake(view.frame.origin.x,+fHeight,+view.frame.size.width,+view.frame.size.height)];++++++++++++
++++++++}+
++++++++else+
++++++++{
++++++++++++[view+setFrame:CGRectMake(view.frame.origin.x,+view.frame.origin.y,+view.frame.size.width,+fHeight)];
++++++++}+++++++
++++}
++++[UIView+commitAnimations];+
}|code-block|syntax|javascript|972266|我还修改了代码，以处理UIDevice方向更改在iOS+6中引入的更改，并确保即使在设备仰卧时也能正常工作。|972267|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Modified Setomidor's answer to work on both landscape, portrait, and iPad (the 320 and 480 values only work on iPhone).

<pre><code>- (void) hideTabBar:(UITabBarController *) tabbarcontroller 
{
 CGRect screenRect = [[UIScreen mainScreen] bounds];

 [UIView beginAnimations:nil context:NULL];
 [UIView setAnimationDuration:0.5];
 float fHeight = screenRect.size.height;
 if( UIDeviceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation) )
 {
 fHeight = screenRect.size.width;
 }

 for(UIView *view in tabbarcontroller.view.subviews)
 {
 if([view isKindOfClass:[UITabBar class]])
 {
 [view setFrame:CGRectMake(view.frame.origin.x, fHeight, view.frame.size.width, view.frame.size.height)];
 } 
 else 
 {
 [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, fHeight)];
 view.backgroundColor = [UIColor blackColor];
 }
 }
 [UIView commitAnimations];
}



- (void) showTabBar:(UITabBarController *) tabbarcontroller 
{ 
 CGRect screenRect = [[UIScreen mainScreen] bounds];
 float fHeight = screenRect.size.height - tabbarcontroller.tabBar.frame.size.height;

 if( UIDeviceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation) )
 {
 fHeight = screenRect.size.width - tabbarcontroller.tabBar.frame.size.height;
 }

 [UIView beginAnimations:nil context:NULL];
 [UIView setAnimationDuration:0.5];
 for(UIView *view in tabbarcontroller.view.subviews)
 { 
 if([view isKindOfClass:[UITabBar class]])
 {
 [view setFrame:CGRectMake(view.frame.origin.x, fHeight, view.frame.size.width, view.frame.size.height)]; 
 } 
 else 
 {
 [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, fHeight)];
 } 
 }
 [UIView commitAnimations]; 
}
</code></pre>

Also modified the code to handle changes introduced in iOS 6 with UIDevice orientation change and ensure that it works properly even when the device is lying on its back.

blocks|key|756777|text|这是Karlbecker.com的答案，移植到MonoTouch+(Xamarin.iOS)。唯一的区别是我在一个继承自UITabBarController的类上实现了这些方法，因此对"tabbarcontroller“的引用被"this”替换了。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|756778|public+void+HideTabBar()
{
++++var+screenRect+=+UIScreen.MainScreen.Bounds;
++++float+fHeight+=+screenRect.Height;
++++if(UIApplication.SharedApplication.StatusBarOrientation+==+UIInterfaceOrientation.LandscapeLeft
+++++++%7C%7C+UIApplication.SharedApplication.StatusBarOrientation+==+UIInterfaceOrientation.LandscapeRight)
++++{
++++++++fHeight+=+screenRect.Width;
++++}

++++UIView.BeginAnimations(null);
++++UIView.SetAnimationDuration(0.4);
++++foreach(UIView+view+in+this.View.Subviews)
++++{
++++++++if(view+is+UITabBar)
++++++++{
++++++++++++view.Frame+=+new+RectangleF(view.Frame.X,+fHeight,+view.Frame.Width,+view.Frame.Height);
++++++++}+
++++++++else+
++++++++{
++++++++++++view.Frame+=+new+RectangleF(view.Frame.X,+view.Frame.Y,+view.Frame.Width,+fHeight);
++++++++++++view.BackgroundColor+=+UIColor.Black;
++++++++}
++++}
++++UIView.CommitAnimations();
}

public+void+ShowTabBar()
{+++
++++var+screenRect+=+UIScreen.MainScreen.Bounds;
++++float+fHeight+=+screenRect.Height+-+49f;
++++if(UIApplication.SharedApplication.StatusBarOrientation+==+UIInterfaceOrientation.LandscapeLeft
+++++++%7C%7C+UIApplication.SharedApplication.StatusBarOrientation+==+UIInterfaceOrientation.LandscapeRight)
++++{
++++++++fHeight+=+screenRect.Width+-+49f;
++++}

++++UIView.BeginAnimations(null);
++++UIView.SetAnimationDuration(0.4);
++++foreach(UIView+view+in+this.View.Subviews)
++++{
++++++++if(view+is+UITabBar)
++++++++{
++++++++++++view.Frame+=+new+RectangleF(view.Frame.X,+fHeight,+view.Frame.Width,+view.Frame.Height);
++++++++}+
++++++++else+
++++++++{
++++++++++++view.Frame+=+new+RectangleF(view.Frame.X,+view.Frame.Y,+view.Frame.Width,+fHeight);
++++++++}
++++}
++++UIView.CommitAnimations();
}|code-block|syntax|javascript|756779|entityMap^0|2L|G|37|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

This is karlbecker_com's answer, ported to MonoTouch (Xamarin.iOS).
The only difference is that I implemented the methods on a class that inherits from UITabBarController, so references to "<code>tabbarcontroller</code>" were replaced by "<code>this</code>".

<pre><code>public void HideTabBar()
{
 var screenRect = UIScreen.MainScreen.Bounds;
 float fHeight = screenRect.Height;
 if(UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeLeft
 || UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeRight)
 {
 fHeight = screenRect.Width;
 }

 UIView.BeginAnimations(null);
 UIView.SetAnimationDuration(0.4);
 foreach(UIView view in this.View.Subviews)
 {
 if(view is UITabBar)
 {
 view.Frame = new RectangleF(view.Frame.X, fHeight, view.Frame.Width, view.Frame.Height);
 } 
 else 
 {
 view.Frame = new RectangleF(view.Frame.X, view.Frame.Y, view.Frame.Width, fHeight);
 view.BackgroundColor = UIColor.Black;
 }
 }
 UIView.CommitAnimations();
}

public void ShowTabBar()
{ 
 var screenRect = UIScreen.MainScreen.Bounds;
 float fHeight = screenRect.Height - 49f;
 if(UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeLeft
 || UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeRight)
 {
 fHeight = screenRect.Width - 49f;
 }

 UIView.BeginAnimations(null);
 UIView.SetAnimationDuration(0.4);
 foreach(UIView view in this.View.Subviews)
 {
 if(view is UITabBar)
 {
 view.Frame = new RectangleF(view.Frame.X, fHeight, view.Frame.Width, view.Frame.Height);
 } 
 else 
 {
 view.Frame = new RectangleF(view.Frame.X, view.Frame.Y, view.Frame.Width, fHeight);
 }
 }
 UIView.CommitAnimations();
}
</code></pre>

blocks|key|756813|text|@karlbecker_com+Answer适用于iPhone+4和iPhone+5。如果有人对底部的iOS7黑条有问题，请将tabBarController设置为半透明|type|unstyled|depth|inlineStyleRanges|entityRanges|data|756814|#define+SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)++([[[UIDevice+currentDevice]+systemVersion]+compare:v+options:NSNumericSearch]+!=+NSOrderedAscending)

//+To+Hide+the+black+line+in+IOS7+only,+this+extra+bit+is+required
if+(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0"))+{
++++[self.tabBarController.tabBar+setTranslucent:YES];
}++|code-block|syntax|javascript|756815|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

@karlbecker_com Answer works perfect for both the iPhone 4 and iPhone 5. If anyone is having issues with iOS7 black bar at the bottom set the tabBarController to translucent

<pre><code>#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

// To Hide the black line in IOS7 only, this extra bit is required
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
 [self.tabBarController.tabBar setTranslucent:YES];
} 
</code></pre>

blocks|key|972387|text|我几乎尝试了所有这些答案，但没有一个对我有效。我的应用程序有一个UITabBarController作为根视图，每个选项卡都有一个UINavigationController。其中一个UINavigationControllers有一个UICollectionViewController作为顶层视图控制器。当用户在UICollectionView中选择一项时，我希望将细节视图控制器推送到导航堆栈上。然后，我的详细视图在底部有一个工具栏。我不希望工具栏出现在选项卡栏的顶部，因为它看起来很傻，而且在这个视图中不需要切换选项卡上下文。我本可以通过手动放置UIToolbars和UITabBars，而不使用UITabBarController和内置的UIToolbar来轻松解决这个问题，但这似乎需要太多的重构，而且有点不雅观。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972388|最后，我的解决方案相当简单:将UITabBarController的边界扩展到屏幕底部之外。我将这个添加到我的细节视图控制器中：|972389|-+(void)viewWillAppear:(BOOL)animated
{
++++[super+viewWillAppear:animated];

++++//+Extend+the+UITabBarController+to+shift+the+tab+bar+off+screen
++++CGRect+screenRect+=+[[UIScreen+mainScreen]+bounds];
++++CGRect+tabBarControllerFrame+=+self.tabBarController.view.frame;
++++if+(animated)+{
++++++++[UIView+beginAnimations:nil+context:NULL];
++++++++[UIView+setAnimationDuration:0.5];
++++++++tabBarControllerFrame.size.height+=+screenRect.size.height+%2B
++++++++++++self.tabBarController.tabBar.frame.size.height;
++++++++[self.tabBarController.view+setFrame:tabBarControllerFrame];
++++++++[UIView+commitAnimations];
++++}
++++else+{
++++++++tabBarControllerFrame.size.height+=+screenRect.size.height+%2B
++++++++++++self.tabBarController.tabBar.frame.size.height;
++++++++[self.tabBarController.view+setFrame:tabBarControllerFrame];
++++}

++++//+Now+show+the+toolbar
++++[self.navigationController+setToolbarHidden:NO+animated:animated];
}

-+(void)viewWillLayoutSubviews
{
++++[super+viewWillLayoutSubviews];

++++//+Ensure+the+UITabBarController+remains+extended+when+subviews+are+laid+out
++++CGRect+screenRect+=+[[UIScreen+mainScreen]+bounds];
++++CGRect+tabBarControllerFrame+=+self.tabBarController.view.frame;
++++tabBarControllerFrame.size.height+=+screenRect.size.height+%2B+
++++++++self.tabBarController.tabBar.frame.size.height;
++++[self.tabBarController.view+setFrame:tabBarControllerFrame];
}|code-block|syntax|javascript|972390|然后，为了在用户弹出到UINavigationController顶部时重新显示选项卡栏，我在顶部视图控制器中添加了以下内容：|972391|-+(void)viewWillAppear:(BOOL)animated
{
++++[super+viewWillAppear:animated];

++++//+Hide+toolbar
++++[self.navigationController+setToolbarHidden:YES+animated:animated];

++++//+Tab+bar+back+on+to+screen
++++CGRect+screenRect+=+[[UIScreen+mainScreen]+bounds];
++++CGRect+tabBarControllerFrame+=+self.tabBarController.view.frame;
++++if+(tabBarControllerFrame.size.height+!=+screenRect.size.height)+{
++++++++if+(animated)+{
++++++++++++[UIView+beginAnimations:nil+context:NULL];
++++++++++++[UIView+setAnimationDuration:0.5];
++++++++++++tabBarControllerFrame.size.height+=+screenRect.size.height;
++++++++++++[self.tabBarController.view+setFrame:tabBarControllerFrame];
++++++++++++[UIView+commitAnimations];
++++++++}
++++++++else+{
++++++++++++tabBarControllerFrame.size.height+=+screenRect.size.height;
++++++++++++[self.tabBarController.view+setFrame:tabBarControllerFrame];
++++++++}
++++}
}|972392|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I tried pretty much all these answers but none of them worked for me. My app has a UITabBarController as the root view, and each tab has a UINavigationController. One of the UINavigationControllers has a UICollectionViewController as the top view controller. When the user selects an item in the UICollectionView, I wanted the detail view controller to get pushed onto the navigation stack. My detail view then had a toolbar at the bottom. I didn't want the toolbar to appear on top of the tab bar as that looks goofy, and switching tab contexts won't be needed from this view. I could probably have easily solved this by manually placing UIToolbars and UITabBars and not using UITabBarController and the built-in UIToolbar, but that seemed like too much refactoring and a bit inelegant.

In the end my solution was fairly simple: extend the bounds of the UITabBarController off the bottom of the screen. I added this to my detail view controller:

<pre><code>- (void)viewWillAppear:(BOOL)animated
{
 [super viewWillAppear:animated];

 // Extend the UITabBarController to shift the tab bar off screen
 CGRect screenRect = [[UIScreen mainScreen] bounds];
 CGRect tabBarControllerFrame = self.tabBarController.view.frame;
 if (animated) {
 [UIView beginAnimations:nil context:NULL];
 [UIView setAnimationDuration:0.5];
 tabBarControllerFrame.size.height = screenRect.size.height +
 self.tabBarController.tabBar.frame.size.height;
 [self.tabBarController.view setFrame:tabBarControllerFrame];
 [UIView commitAnimations];
 }
 else {
 tabBarControllerFrame.size.height = screenRect.size.height +
 self.tabBarController.tabBar.frame.size.height;
 [self.tabBarController.view setFrame:tabBarControllerFrame];
 }

 // Now show the toolbar
 [self.navigationController setToolbarHidden:NO animated:animated];
}

- (void)viewWillLayoutSubviews
{
 [super viewWillLayoutSubviews];

 // Ensure the UITabBarController remains extended when subviews are laid out
 CGRect screenRect = [[UIScreen mainScreen] bounds];
 CGRect tabBarControllerFrame = self.tabBarController.view.frame;
 tabBarControllerFrame.size.height = screenRect.size.height + 
 self.tabBarController.tabBar.frame.size.height;
 [self.tabBarController.view setFrame:tabBarControllerFrame];
}
</code></pre>

Then to reshow the tab bar when the user pops back to the top of my UINavigationController, I added this to my top view controller:

<pre><code>- (void)viewWillAppear:(BOOL)animated
{
 [super viewWillAppear:animated];

 // Hide toolbar
 [self.navigationController setToolbarHidden:YES animated:animated];

 // Tab bar back on to screen
 CGRect screenRect = [[UIScreen mainScreen] bounds];
 CGRect tabBarControllerFrame = self.tabBarController.view.frame;
 if (tabBarControllerFrame.size.height != screenRect.size.height) {
 if (animated) {
 [UIView beginAnimations:nil context:NULL];
 [UIView setAnimationDuration:0.5];
 tabBarControllerFrame.size.height = screenRect.size.height;
 [self.tabBarController.view setFrame:tabBarControllerFrame];
 [UIView commitAnimations];
 }
 else {
 tabBarControllerFrame.size.height = screenRect.size.height;
 [self.tabBarController.view setFrame:tabBarControllerFrame];
 }
 }
}
</code></pre>

blocks|key|756897|text|在iOS8中，只需设置tabBar的hidden属性就足够了|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|756898|就像在Swift中，你可以|756899|rootTabVC+=+UITabBarController()
rootTabVC?.tabBar.hidden+=+true|code-block|syntax|javascript|756900|我在appdelegate中的didFinishLaunchingWithOptions中这样做了，它工作得很好，我想如果我没记错的话，在旧的iOS版本中，你还需要将tabBar的frame设置为屏幕外的某个东西，否则tabbar不会显示，但它仍然会占用空间。|756901|entityMap^0|B|6|I|6|0|0|0|2|B|F|T|2B|6|2I|5|31|6|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|C]|$9|16|A|17|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|P|$]]

in iOS8 it is enough to just set the <code>hidden</code> property of the <code>tabBar</code> 
Like in Swift you can 

<pre><code>rootTabVC = UITabBarController()
rootTabVC?.tabBar.hidden = true
</code></pre>

I do this in my <code>didFinishLaunchingWithOptions</code> in the <code>appdelegate</code> and it works fine, I think if I remember correctly in the older iOS versions you also needed to set the <code>frame</code> of the <code>tabBar</code> to something outside the screen, otherwise the <code>tabbar</code> would not show but it will still occupy the space.

blocks|key|756927|text|已更新并适用于swift+5和ios+14.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|756928|/*
++++Shows+or+hides+the+tabbar

++++:param:+hidden++++++++++++whether+to+show+or+hide+the+tabbar
++++:param:+animationDuration+the+animation's+duration
*/
extension+UITabBarController+{
++++func+setHidden(hidden:Bool,+animationDuration:TimeInterval+=+0.25)+{
++++++++
++++++++let+screenRect+=+UIScreen.main.bounds
++++++++var+fHeight+=+screenRect.size.height
++++++++
++++++++if+!hidden+{
++++++++++++fHeight+-=+self.tabBar.frame.size.height
++++++++}
++++++++
++++++++UIView.animate(withDuration:+animationDuration,+animations:+{
++++++++++++for+view+in+self.view.subviews+{
++++++++++++++++if+view+is+UITabBar+{
++++++++++++++++++++view.frame+=+CGRect(
++++++++++++++++++++++++x:+view.frame.origin.x,
++++++++++++++++++++++++y:+fHeight,
++++++++++++++++++++++++width:+view.frame.size.width,
++++++++++++++++++++++++height:+view.frame.size.height)
++++++++++++++++}
++++++++++++}
++++++++})
++++}
}|code-block|syntax|javascript|756929|这是一个更直接的端口(未测试)：|756930|/*
++++Shows+or+hides+the+tabbar

++++:param:+hidden++++++++++++whether+to+show+or+hide+the+tabbar
++++:param:+animationDuration+the+animation's+duration
*/
extension+UITabBarController+{
++++func+setHidden(hidden:Bool,+animationDuration:TimeInterval+=+0.25)+{
++++++++
++++++++let+screenRect+=+UIScreen.main.bounds
++++++++var+fHeight+=+screenRect.size.height
++++++++
++++++++if+UIApplication.shared.statusBarOrientation.isLandscape+{
++++++++++++fHeight+=+screenRect.size.width
++++++++}
++++++++
++++++++if+!hidden+{
++++++++++++fHeight+-=+self.tabBar.frame.size.height
++++++++}
++++++++
++++++++UIView.animate(withDuration:+animationDuration,+animations:+{
++++++++++++for+view+in+self.view.subviews+{
++++++++++++++++if+view+is+UITabBar+{
++++++++++++++++++++view.frame+=+CGRect(
++++++++++++++++++++++++x:+view.frame.origin.x,
++++++++++++++++++++++++y:+fHeight,
++++++++++++++++++++++++width:+view.frame.size.width,
++++++++++++++++++++++++height:+view.frame.size.height)
++++++++++++++++}
++++++++++++++++else+if+hidden+{
++++++++++++++++++++view.frame+=+CGRect(
++++++++++++++++++++++++x:+view.frame.origin.x,
++++++++++++++++++++++++y:+view.frame.origin.y,
++++++++++++++++++++++++width:+view.frame.size.width,
++++++++++++++++++++++++height:+fHeight)
++++++++++++++++}
++++++++++++}
++++++++},+completion:+{+finished+in
++++++++++++if+!hidden+{
++++++++++++++++UIView.animate(withDuration:+animationDuration,+animations:+{
++++++++++++++++++++for+view+in+self.view.subviews+{
++++++++++++++++++++++++if+!(view+is+UITabBar)+{
++++++++++++++++++++++++++++view.frame+=+CGRect(
++++++++++++++++++++++++++++++++x:+view.frame.origin.x,
++++++++++++++++++++++++++++++++y:+view.frame.origin.y,
++++++++++++++++++++++++++++++++width:+view.frame.size.width,
++++++++++++++++++++++++++++++++height:+fHeight)
++++++++++++++++++++++++}
++++++++++++++++++++}
++++++++++++++++})
++++++++++++}
++++++++})
++++}
}|756931|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Updated and Working for swift 5 and ios 14.0
<pre><code>/*
 Shows or hides the tabbar

 :param: hidden whether to show or hide the tabbar
 :param: animationDuration the animation's duration
*/
extension UITabBarController {
 func setHidden(hidden:Bool, animationDuration:TimeInterval = 0.25) {
 
 let screenRect = UIScreen.main.bounds
 var fHeight = screenRect.size.height
 
 if !hidden {
 fHeight -= self.tabBar.frame.size.height
 }
 
 UIView.animate(withDuration: animationDuration, animations: {
 for view in self.view.subviews {
 if view is UITabBar {
 view.frame = CGRect(
 x: view.frame.origin.x,
 y: fHeight,
 width: view.frame.size.width,
 height: view.frame.size.height)
 }
 }
 })
 }
}
</code></pre>
This is a more direct port (not tested):
<pre><code>/*
 Shows or hides the tabbar

 :param: hidden whether to show or hide the tabbar
 :param: animationDuration the animation's duration
*/
extension UITabBarController {
 func setHidden(hidden:Bool, animationDuration:TimeInterval = 0.25) {
 
 let screenRect = UIScreen.main.bounds
 var fHeight = screenRect.size.height
 
 if UIApplication.shared.statusBarOrientation.isLandscape {
 fHeight = screenRect.size.width
 }
 
 if !hidden {
 fHeight -= self.tabBar.frame.size.height
 }
 
 UIView.animate(withDuration: animationDuration, animations: {
 for view in self.view.subviews {
 if view is UITabBar {
 view.frame = CGRect(
 x: view.frame.origin.x,
 y: fHeight,
 width: view.frame.size.width,
 height: view.frame.size.height)
 }
 else if hidden {
 view.frame = CGRect(
 x: view.frame.origin.x,
 y: view.frame.origin.y,
 width: view.frame.size.width,
 height: fHeight)
 }
 }
 }, completion: { finished in
 if !hidden {
 UIView.animate(withDuration: animationDuration, animations: {
 for view in self.view.subviews {
 if !(view is UITabBar) {
 view.frame = CGRect(
 x: view.frame.origin.x,
 y: view.frame.origin.y,
 width: view.frame.size.width,
 height: fHeight)
 }
 }
 })
 }
 })
 }
}
</code></pre>

blocks|key|972497|text|隐藏标签栏不是一个足够的解决方案，它不会调整当前视图控制器的视图高度。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972498|相反，您可以简单地转换选项卡栏本身，通过其高度(隐藏)或身份转换来重置为可见。|972499|extension+UITabBarController+{
++++func+setBarHiddenAnimated(_+hidden:Bool)+{
++++++++UIView.animate(withDuration:+0.3,+animations:+{
++++++++++++if+hidden+{
++++++++++++++++self.tabBar.transform+=+CGAffineTransform(translationX:+0,+y:+self.tabBar.frame.size.height)
++++++++++++}+else+{
++++++++++++++++self.tabBar.transform+=+CGAffineTransform.identity
++++++++++++}
++++++++})
++++}
}|code-block|syntax|javascript|972500|请注意，您可能需要将视图控制器设置为“延伸至底部条下方”和“延伸至不透明条下方”，以便在动画过程中移除黑色背景。|972501|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Hiding the tab bar is not an adequate solution, it won't adjust the current view controllers view height.

Instead you may simply transform the tab bar itself, either by it's height (to hide) or an identity transform to reset to visible.

<pre><code>extension UITabBarController {
 func setBarHiddenAnimated(_ hidden:Bool) {
 UIView.animate(withDuration: 0.3, animations: {
 if hidden {
 self.tabBar.transform = CGAffineTransform(translationX: 0, y: self.tabBar.frame.size.height)
 } else {
 self.tabBar.transform = CGAffineTransform.identity
 }
 })
 }
}
</code></pre>

Note that you may need to set your view controller to 'extends below bottom bars' and 'extends under opaque bars' to remove the black background during animation.

blocks|key|972541|text|一个带有动画的快速版本，你需要自己设置一个属性isHideTabBar。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|972542|self.isHideTabBar+=+!self.isHideTabBar
UIView.animate(withDuration:+0.5,+animations:+{
++++self.tabBarController?.tabBar.frame+=+(self.tabBarController?.tabBar.frame.offsetBy(dx:+0,+dy:+self.isHideTabBar+?+100+:+-100))!
+})|code-block|syntax|javascript|972543|entityMap^0|N|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

A swift version with animation, you need set a property <code>isHideTabBar</code> by yourself. 

<pre><code>self.isHideTabBar = !self.isHideTabBar
UIView.animate(withDuration: 0.5, animations: {
 self.tabBarController?.tabBar.frame = (self.tabBarController?.tabBar.frame.offsetBy(dx: 0, dy: self.isHideTabBar ? 100 : -100))!
 })
</code></pre>

I have a problem with <code>UITabBarController</code>. In my application, I want to hide it but without using <code>hidesBottomBarWhenPushed</code> because I want to hide it not when I pushed it. For Example, I want to hide it when I press a Hide button in my application. 

I read many articles in google but I cant find out how I can do this.

How to hide uitabbarcontroller

Xamarin

Swift

我对UITabBarController有个问题。在我的应用程序中，我想隐藏它，但不使用hidesBottomBarWhenPushed，因为我想隐藏它，而不是在推送它时隐藏它。例如，当我在应用程序中按下隐藏按钮时，我想隐藏它。我在谷歌上读了很多文章，但我找不到我该怎么做。

问如何隐藏uitabbarcontroller
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