如何在 iOS 中禁用导航栏按钮项
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how to disable a navigation bar button item in iOS
提问by Sravan
I have created a navigation controller. In the second view (which is pushed), I have some webservice call and placing a overlay view and setting
我创建了一个导航控制器。在第二个视图（被推送）中，我有一些网络服务调用并放置了一个覆盖视图和设置
self.view.userInteractionEnabled = NO ;
self.view.userInteractionEnabled = NO ;
Once web service call is complete, then I am reverting to
Web 服务调用完成后，我将恢复到
self.view.userInteractionEnabled = YES ;
self.view.userInteractionEnabled = YES ;
When I do this, every other buttons except the buttons on the navigation bar are disabled. How to disable those two navigation bar button items ? (a button similar to back button, which pops to first view controller and another button which gives info about help).
当我这样做时，除导航栏上的按钮外，所有其他按钮都被禁用。如何禁用这两个导航栏按钮项？（一个类似于后退按钮的按钮，它弹出到第一个视图控制器和另一个提供有关帮助信息的按钮）。
I have tried using self.navigationItem.backBarButtonItem.enabled = NO. But still I am able to tap on the button and can navigate to first screen. How can I disable these two buttons ?
我试过使用self.navigationItem.backBarButtonItem.enabled = NO. 但我仍然可以点击按钮并导航到第一个屏幕。如何禁用这两个按钮？
回答by Vijay-Apple-Dev.blogspot.com
Try this
尝试这个
Recommended
受到推崇的
self.navigationItem.leftBarButtonItem.enabled = NO;
self.navigationItem.rightBarButtonItem.enabled = NO;
Or Simply Disable by
或简单地禁用
on Edge case
在边缘情况下
self.view.window.userInteractionEnabled = NO;
Update:Recently Apple doesn't allow the back button to enable / disable. Instead of that we can hide it.
更新：最近苹果不允许后退按钮启用/禁用。相反，我们可以隐藏它。
self.navigationItem.hidesBackButton = YES;
回答by Jay Mayu
You can do the following if you are running on Swift
如果您正在运行，您可以执行以下操作 Swift
self.navigationItem.rightBarButtonItem?.enabled = true
This snippet will disable the button.
此代码段将禁用该按钮。
回答by jbouaziz
Just disable your UINavigationControllerview and navigation bar interaction:
只需禁用您的UINavigationController视图和导航栏交互：
self.navigationController.navigationBar.userInteractionEnabled = NO;
self.navigationController.view.userInteractionEnabled = NO;
And enable it when you need it back:
并在需要时启用它：
self.navigationController.navigationBar.userInteractionEnabled = YES;
self.navigationController.view.userInteractionEnabled = YES;
回答by ObjectiveTC
Latest Swift: To hide the back button, you MUST use:
最新 Swift：要隐藏后退按钮，您必须使用：
self.navigationItem.setHidesBackButton(true, animated: false)
Note: This can trigger a bug in the navigation bar that can cause an artifact to appear in place of a hidden back button when transitioning to a view that doesn't have a back button (or has a leftButton in its place). The artifact that appears is either ellipses "..." or the title of the previous viewController on the stack. I believe this bug to be related to the bug documented in apple's own sample code project "CustomizingUINavigationBar", CustomBackButtonViewController.m
注意：这可能会触发导航栏中的错误，当转换到没有后退按钮（或在其位置有左按钮）的视图时，可能会导致出现一个工件来代替隐藏的后退按钮。出现的工件要么是省略号“...”，要么是堆栈上前一个 viewController 的标题。我相信这个错误与苹果自己的示例代码项目“CustomizingUINavigationBar”中记录的错误有关，CustomBackButtonViewController.m
回答by Kavin Varnan
This code should work on Swift 4.2
此代码应该适用于 Swift 4.2
self.navigationItem.rightBarButtonItem?.isEnabled = false
The above code will disable the button. To enable it switch the boolean to true
上面的代码将禁用按钮。要启用它，将布尔值切换为 true
回答by andrewlundy
The simplest way to truly disable a UIBarButtonItem would be as followed:
真正禁用 UIBarButtonItem 的最简单方法如下：
barButtonVar.isEnabled = false
回答by andrewlundy
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.leftBarButtonItem=nil;
self.navigationItem.hidesBackButton=YES;
}
回答by Muhammad Fasi
Try this code:
试试这个代码：
UIApplication.sharedApplication().beginIgnoringInteractionEvents()
This will stop user to interaction with app and after service call, write this code again:
这将阻止用户与应用程序交互，并在服务调用后再次编写此代码：
UIApplication.sharedApplication().endIgnoringInteractionEvents()
Sure this will help.
当然这会有所帮助。
回答by Sjakelien
I solved this by just adding a property to my viewcontroller:
我通过向我的视图控制器添加一个属性来解决这个问题：
@property (nonatomic, strong) IBOutlet UIBarButtonItem * RightButton;
I then connected it to the button on the storyboard. You can then at will set its properties like:
然后我将它连接到故事板上的按钮。然后，您可以随意设置其属性，例如：
self.RightButton.enabled=true;
回答by Sagar D
For version iOS 10.3, swift 3:
对于 iOS 10.3 版本，swift 3：
self.navigationItem.rightBarButtonItem?.isEnabled = false.
