Question

我必须在App中获得许可才能发送和获取一些数据。当我尝试获取数据时，如果未启用权限，则会出现一些错误，因此我尝试在AppDelegate中获取权限。 这是正确的方法吗？。

此外，当请求权限选择时，如果我突然从App退出并再次返回，则权限始终显示弹出窗口“您没有权限”，并且由于从AppDelegate检查控件，我重定向到“设置/权限”。但是“权限”未显示在“设置”中，因为我尚未安装权限。我该如何处理此权限问题。 哪种方法是最好的？

// AppDelegate

func applicationDidBecomeActive(_ application: UIApplication) {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.

    let libStatus = GlobalVariables.defaults.object(forKey: "isCreatedAlbum") as? Bool

    if libStatus != true {
        PermissionsControl().library()
    }

}

// PermissionControl库

func library(){

    let libraryAuth = PHPhotoLibrary.authorizationStatus()
    var topWindow: UIWindow? = UIWindow(frame: UIScreen.main.bounds)

    print("Library Authorization Status \(PHPhotoLibrary.authorizationStatus().hashValue)")

    if libraryAuth == PHAuthorizationStatus.authorized {

        topWindow?.isHidden = false // if you want to hide the topwindow then use this
        topWindow = nil // if you want to remove the topwindow then use this

        let permissionStatus = GlobalVariables.defaults.object(forKey: "isCreatedAlbum") as? Bool

        if permissionStatus != true {
            CustomPhotoAlbum().createAlbum()
            GlobalVariables.defaults.set(true, forKey: "isCreatedAlbum")
        }

    } else if libraryAuth == PHAuthorizationStatus.notDetermined || libraryAuth == PHAuthorizationStatus.denied {


        topWindow?.rootViewController = UIViewController()
        topWindow?.windowLevel = UIWindowLevelAlert + 1
        let alert: UIAlertController =  UIAlertController(title: "Permission Error", message: "\nPlease give permission for Library!\n", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "Settings", style: .default , handler: {(action: UIAlertAction) -> Void in

            // continue your work

            guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
                return
            }

            if UIApplication.shared.canOpenURL(settingsUrl) {
                UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                    print("Settings opened: \(success)") // Prints true
                })
            }

        }))

        topWindow?.makeKeyAndVisible()
        topWindow?.rootViewController?.present(alert, animated: true, completion: nil)
    }

}

Swift-我如何获得许可？定位服务，图片库等

0 个答案: