iOS development status bar and setting functions are comprehensively explained in detail

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In iOS applications, the Status Bar is used to display some information about the current device, such as battery level, network connection status, time, etc. During the development process, we can enhance the user experience by modifying the status bar, such as displaying the status of network requests, displaying the playback progress of the audio player, etc.

Here are several ways to modify the status bar and its code implementation in Swift:

1. Set the status bar style (there are more detailed answers below):

existUIViewControllerWe can set itpreferredStatusBarStyleProperties to set the status bar style. In this property, we can specify different styles, such as black and white characters, white and black characters, etc.

Code example:

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent      // Set black style on white background}

2. Hide the status bar:

existUIViewContollerWe can set itprefersStatusBarHiddenProperties to hide the status bar.

Code example:

override var prefersStatusBarHidden: Bool {
    return true     // Hide the status bar}

3. Set the background color of the status bar:

existiOS7After that, we can implement a custom status bar background color to remove the default translucent effect.

Code example:

// Set the background color of the status barif let statusBar = (forKeyPath: "") as? UIView {
     = .red   // Set to red}

In Swift, we can set the status bar color in the following ways:

1. Set it in the file

We can set it in the fileUIViewControllerBasedStatusBarAppearanceforfalse, and thenAppDelegateUsed inSet the status bar style globally.

Code example:

// 
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [: Any]?) -> Bool {
    // Set the status bar style     = .lightContent
    return true
}
// 
<key>UIViewControllerBasedStatusBarAppearance</key>
<false/>

2. Set it in UIViewController

We can do it in eachUIViewControllerRewrite inpreferredStatusBarStyleProperties to style the status bar of the page.

Code example:

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

3. Set it in UIApplication

In older iOS versions, setting the status bar style in UIApplication can globally modify the status bar style of the entire application.

Code example:

// Set global status bar style = .lightContent

4. There is a navigation bar

If we use the navigation controllerUINavigationController, and itsnavigationBarNot hidden, you will find that even if you rewrite itpreferredStatusBarStyleMethod, this method will not be called. Because at this time the style of the status bar is automatically changed according to the style of the navigation bar.

Code example:

class QQBaseNavVC: UINavigationController {
    override func viewDidLoad() {
        ()
        = .black
        // Do any additional setup after loading the view.
    }
}

import UIKit
   class ViewController: UIViewController {
   // The style used by statusBar   var style: UIStatusBarStyle = .default
   //Reproduce statusBar related methods   override var preferredStatusBarStyle: UIStatusBarStyle {
   return 
   }
   override func viewDidLoad() {
   ()
   }
   // Switch styles every time you click the button   @IBAction func changeBtnStyle(_ sender: Any) {
   if let isHidden = ?.isNavigationBarHidden {
   // Toggle the navigation bar to display or hide   ?.isNavigationBarHidden = !isHidden
   // Update the status bar color    = !isHidden ? .lightContent : .default
}
}
}

The above is a detailed explanation of the iOS development status bar and setting functions. For more information about iOS development status bar settings, please pay attention to my other related articles!