UIApplication.open(_:options:completionHandler:)只能在主线程中使用

解决方案:

if let appSettings = URL(string: UIApplication.openSettingsURLString + Bundle.main.bundleIdentifier!) {
  if UIApplication.shared.canOpenURL(appSettings) {
    DispatchQueue.main.async {
        UIApplication.shared.open(appSettings)
    }
  }
}

警告:prefs:root或App-Prefs:root URL方案被认为是私有API。如果你使用这些，苹果可能会拒绝你的应用，以下是你提交应用时可能会遇到的情况:

Your app uses the "prefs:root=" non-public URL scheme, which is a private entity. The use of non-public APIs is not permitted on the App Store because it can lead to a poor user experience should these APIs change. Continuing to use or conceal non-public APIs in future submissions of this app may result in the termination of your Apple Developer account, as well as removal of all associated apps from the App Store. Next Steps To resolve this issue, please revise your app to provide the associated functionality using public APIs or remove the functionality using the "prefs:root" or "App-Prefs:root" URL scheme. If there are no alternatives for providing the functionality your app requires, you can file an enhancement request.

剪力/ 12 +

open(url:options:completionHandler:)方法已经被更新为包含一个非空的选项字典，在这篇文章中只包含一个可能的UIApplication类型的选项。OpenExternalURLOptionsKey(在本例中)。

@objc func openAppSpecificSettings() {
    guard let url = URL(string: UIApplication.openSettingsURLString),
        UIApplication.shared.canOpenURL(url) else {
            return
    }
    let optionsKeyDictionary = [UIApplication.OpenExternalURLOptionsKey(rawValue: "universalLinksOnly"): NSNumber(value: true)]
    
    UIApplication.shared.open(url, options: optionsKeyDictionary, completionHandler: nil)
}

显式地构造一个URL，比如“App-Prefs”，会导致一些应用被商店拒绝。

我看过这行代码

UIApplication.sharedApplication() .openURL(NSURL(string:"prefs:root=General")!)

是不工作，它没有为我在ios10/ Xcode 8，只是一个小的代码差异，请替换这个

UIApplication.sharedApplication().openURL(NSURL(string:"App-Prefs:root=General")!)

Swift3

UIApplication.shared.openURL(URL(string:"prefs:root=General")!)

替换为

UIApplication.shared.openURL(URL(string:"App-Prefs:root=General")!)

希望能有所帮助。 欢呼。

⚠️小心! 这个答案是基于未记录的api，最近(从iOS12开始)苹果拒绝使用这种方法的应用程序。

以下是原始答案

斯威夫特5

UIApplication.shared.open(URL(string: UIApplication.openSettingsURLString)!, options: [:], completionHandler: nil)

斯威夫特4

UIApplication.shared.open(URL(string: UIApplicationOpenSettingsURLString)!, options: [:], completionHandler: nil)

注意:以下方法适用于iOS 11以下的所有版本，对于更高版本的应用程序可能会被拒绝，因为它是一个私有API

有时我们想让用户进入应用程序设置以外的设置。 下面的方法将帮助你实现这个目标:

首先，在项目中配置URL方案。你会发现它在目标->信息-> URL方案。点击+按钮，在URL方案中输入prefs

斯威夫特5

UIApplication.shared.open(URL(string: "App-prefs:Bluetooth")!)

斯威夫特3

UIApplication.shared.open(URL(string:"App-Prefs:root=General")!, options: [:], completionHandler: nil)

斯威夫特

UIApplication.sharedApplication().openURL(NSURL(string:"prefs:root=General")!)

objective - c

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=General"]];

和下面是所有可用的url

**在IOS上< 12 **

prefs:root=General&path=About prefs:root=General&path=ACCESSIBILITY prefs:root=AIRPLANE_MODE prefs:root=General&path=AUTOLOCK prefs:root=General&path=USAGE/CELLULAR_USAGE prefs:root=Brightness prefs:root=Bluetooth prefs:root=General&path=DATE_AND_TIME prefs:root=FACETIME prefs:root=General prefs:root=General&path=Keyboard prefs:root=CASTLE prefs:root=CASTLE&path=STORAGE_AND_BACKUP prefs:root=General&path=INTERNATIONAL prefs:root=LOCATION_SERVICES prefs:root=ACCOUNT_SETTINGS prefs:root=MUSIC prefs:root=MUSIC&path=EQ prefs:root=MUSIC&path=VolumeLimit prefs:root=General&path=Network prefs:root=NIKE_PLUS_IPOD prefs:root=NOTES prefs:root=NOTIFICATIONS_ID prefs:root=Phone prefs:root=Photos prefs:root=General&path=ManagedConfigurationList prefs:root=General&path=Reset prefs:root=Sounds&path=Ringtone prefs:root=Safari prefs:root=General&path=Assistant prefs:root=Sounds prefs:root=General&path=SOFTWARE_UPDATE_LINK prefs:root=STORE prefs:root=TWITTER prefs:root=FACEBOOK prefs:root=General&path=USAGE prefs:root=VIDEO prefs:root=General&path=Network/VPN prefs:root=Wallpaper prefs:root=WIFI prefs:root=INTERNET_TETHERING prefs:root=Phone&path=Blocked prefs:root=DO_NOT_DISTURB

在IOS 13上

App-prefs:General&path=About App-prefs:AIRPLANE_MODE App-prefs:General&path=AUTOLOCK App-prefs:Bluetooth App-prefs:General&path=DATE_AND_TIME App-prefs:FACETIME App-prefs:General App-prefs:General&path=Keyboard App-prefs:CASTLE App-prefs:CASTLE&path=STORAGE_AND_BACKUP App-prefs:General&path=INTERNATIONAL App-prefs:MUSIC App-prefs:NOTES App-prefs:NOTIFICATIONS_ID App-prefs:Phone App-prefs:Photos App-prefs:General&path=ManagedConfigurationList App-prefs:General&path=Reset App-prefs:Sounds&path=Ringtone App-prefs:Sounds App-prefs:General&path=SOFTWARE_UPDATE_LINK App-prefs:STORE App-prefs:Wallpaper App-prefs:WIFI App-prefs:INTERNET_TETHERING App-prefs:DO_NOT_DISTURB Not tested App-prefs:TWITTER (??) App-prefs:FACEBOOK (??) App-prefs:NIKE_PLUS_IPOD (??)

注意:网络设置将不会在模拟器中打开，但该链接将在真实设备上工作。

如上所述@niravdesai说App-prefs。 我发现App-Prefs:适用于iOS 9、10和11。设备测试。 where as prefs:仅适用于iOS 9。