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AppDelegateでAlertDialogを出したい場合(rootViewControllerの取得)

Last updated at Posted at 2015-02-18

#rootViewControllerの取得

AppDelegateでAlertDialogを出すのには、rootViewControllerを取得しないとそもそも表示できないので

AppDelegate
import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

とやっといて

AppDelegate
self.window?.rootViewController?

で取得する。

#debugとかでalertdialogを出したい場合

debugモードを使う方法は、Swift での #ifdef DEBUG のやり方を参考にしてください。

AppDelegate
#if DEBUG
    var body:NSString = "えらーめっせーじ" + "\(error)"
    var alertController:UIAlertController = UIAlertController(title: "通知", message: body, preferredStyle: UIAlertControllerStyle.Alert)
    alertController.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
    self.window?.rootViewController?.presentViewController(alertController, animated: true, completion: nil)
#endif
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