从UIKit > UIApplication.h:

// Setting statusBarHidden does nothing if your application is using the default UIViewController-based status bar system.
@property(nonatomic,getter=isStatusBarHidden) BOOL statusBarHidden;
- (void)setStatusBarHidden:(BOOL)hidden withAnimation:(UIStatusBarAnimation)animation NS_AVAILABLE_IOS(3_2);

所以应该将基于视图控制器的状态栏外观设置为NO

从UIKit > UIApplication.h:

// Setting statusBarHidden does nothing if your application is using the default UIViewController-based status bar system.
@property(nonatomic,getter=isStatusBarHidden) BOOL statusBarHidden;
- (void)setStatusBarHidden:(BOOL)hidden withAnimation:(UIStatusBarAnimation)animation NS_AVAILABLE_IOS(3_2);

所以应该将基于视图控制器的状态栏外观设置为NO

在Info.plist中添加以下内容:

<key>UIStatusBarHidden</key>
<true/>
<key>UIViewControllerBasedStatusBarAppearance</key>
<false/>

Swift 3更新:

更新信息。请输入以下信息:

基于视图控制器的状态栏外观:NO

然后，在ViewController或其他地方:

isstatusbarhidden = true

要回答Susitha的问题:使用setNeedsStatusBarAppearanceUpdate。这将调用prefersStatusBarHidden来刷新你想要的状态栏状态。试试这个:

    @property (nonatomic, getter=isHideStatusBar) BOOL hideStatusBar; // Give this a default value early

    - (BOOL)prefersStatusBarHidden {
        return self.isHideStatusBar;
    }

    - (void)someMethod {
    // triggered by an event or user action
    [self setHideStatusBar:YES];
    [self setNeedsStatusBarAppearanceUpdate];
    }

如果您想再次看到状态栏，请将属性hideStatusBar(或任何您所调用的属性)设置为NO。通过另一个调用来间接调用preferStatusBarHidden

[self setNeedsStatusBarAppearanceUpdate]

以下是Swift版本(iOS9之前):

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)
    UIApplication.sharedApplication().setStatusBarHidden(true, withAnimation: UIStatusBarAnimation.None)
}

override func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)
    UIApplication.sharedApplication().setStatusBarHidden(false, withAnimation: UIStatusBarAnimation.None)
}

这也适用于(iOS7+):

override func prefersStatusBarHidden() -> Bool {
    return true
}

你还需要调用:

setNeedsStatusBarAppearanceUpdate()

在viewDidLoad()中。

注意，如果你使用SplitView控制器，或者其他容器视图控制器，你还需要让它在发送childViewControllerForStatusBarHidden时返回你的类。一种方法是为statusController设置一个公共弱变量，并在这个被重写的方法中返回它。