使用Swift，UIAlertController提示用户可以打开位置设置吗？

Question

在我的Swift应用程序中，我检查 locationServiceEnabled（）。如果它返回false，我应该使用UIAlertController提示用户进行位置设置。 可以这样做吗？ 我使用此函数提示应用程序的位置设置：

 func displayAlertToEnableLocationServicesApp()
{
    let alertController = UIAlertController(
        title: "Location Access is Turned Off",
        message: "In order to locate your position, please open settings and set location access to 'While Using the App'",
        preferredStyle: .Alert)

    let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
    alertController.addAction(cancelAction)

    let openAction = UIAlertAction(title: "Settings", style: .Default) { (action) in
        if let url = NSURL(string: UIApplicationOpenSettingsURLString) {
            UIApplication.sharedApplication().openURL(url)
        }
    }
    alertController.addAction(openAction)
    self.presentViewController(alertController, animated: true, completion: nil)
}

但是这个功能打开设置应用程序，而不是位置设置。 我需要打开（设置 - ＆gt;隐私 - >位置）

由于

Answer 1

从iOS8

，您可以从自定义应用程序打开设置系统位置。

Swift 3

let alertVC = UIAlertController(title: "Geolocation is not enabled", message: "For using geolocation you need to enable it in Settings", preferredStyle: .actionSheet)
alertVC.addAction(UIAlertAction(title: "Open Settings", style: .default) { value in 
    let path = UIApplicationOpenSettingsURLString
    if let settingsURL = URL(string: path), UIApplication.shared.canOpenURL(settingsURL) {
        UIApplication.shared.openURL(settingsURL)
    }
})
alertVC.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

viewController.present(alertVC, animated: true, completion: nil)

Swift 2.3

let alertVC = UIAlertController(title: "Geolocation is not enabled", message: "For using geolocation you need to enable it in Settings", preferredStyle: .ActionSheet)
alertVC.addAction(UIAlertAction(title: "Open Settings", style: .Default) { value in
    UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!)
})
alertVC.addAction(UIAlertAction(title: "Cancel", style: .Cancel, handler: nil))

viewController.presentViewController(alertVC, animated: true, completion: nil)

Answer 2

首先在项目中配置URL Schemes。你会在Target中找到它 - ＆gt;信息 - ＆gt;网址方案。单击+按钮并在URL方案中键入prefs

现在替换if let url = NSURL(string: UIApplicationOpenSettingsURLString)
与if let url = NSURL(string: "prefs:root=LOCATION_SERVICES"))

以下是所有可用的网址

• prefs：root = General＆amp; path = About
• 首选项：根=通用及安培;路径= ACCESSIBILITY
• prefs：root = AIRPLANE_MODE
• 首选项：根=通用及安培;路径= AUTOLOCK
• prefs：root = General＆amp; path = USAGE / CELLULAR_USAGE
• 首选项：根=亮度
• 首选项：根=通用及安培;路径=蓝牙
• prefs：root = General＆amp; path = DATE_AND_TIME
• 首选项：根= FACETIME
• prefs：root = General
• prefs：root = General＆amp; path = Keyboard
• 首选项：根= CASTLE
• 首选项：根=城堡＆安培;路径= STORAGE_AND_BACKUP
• prefs：root = General＆amp; path = INTERNATIONAL
• 首选项：根= LOCATION_SERVICES
• prefs：root = ACCOUNT_SETTINGS
• prefs：root = MUSIC
• 首选项：根=音乐与安培;路径= EQ
• prefs：root = MUSIC＆amp; path = VolumeLimit
• 首选项：根=通用及安培;路径=网络
• prefs：root = NIKE_PLUS_IPOD
• 首选项：根= NOTES
• prefs：root = NOTIFICATIONS_ID
• prefs：root = Phone
• 首选项：根=照片
• 首选项：根=通用及安培;路径= ManagedConfigurationList
• prefs：root = General＆amp; path = Reset
• 首选项：根=声音和安培;路径=铃声
• prefs：root = Safari
• prefs：root = General＆amp; path = Assistant
• 首选项：根=声音
• prefs：root = General＆amp; path = SOFTWARE_UPDATE_LINK
• 首选项：根= STORE
• 首选项：根= TWITTER
• prefs：root = FACEBOOK
• prefs：root = General＆amp; path = USAGE prefs：root = VIDEO
• prefs：root = General＆amp; path = Network / VPN
• 首选项：根=壁纸
• prefs：root = WIFI
• 首选项：根= INTERNET_TETHERING

Answer 3

打开应用程序设置。 Xcode 8.2.1 - iOS 10

if let appSettings = URL(string: UIApplicationOpenSettingsURLString) {
    UIApplication.shared.open(appSettings, options: [:], completionHandler: nil)
}