swift - 使用 Swift，是否可以使用 UIAlertController 提示用户打开位置设置？

Question

在我的 Swift 应用程序中，我检查是否 locationServiceEnabled()。如果它返回 false，我应该使用 UIAlertController 提示用户进行位置设置。有可能这样做吗？我使用此功能来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 -> 隐私 -> 位置)

谢谢

Answer 1

从 iOS8 开始，您可以从自定义应用打开设置系统位置。

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)