【iOS8とiOS7対応】SwiftでPush

iOS8からPush通知の登録方法が変わりましたが、現場ではiOS7も対応しないといけないと思います。

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        
        var currentVersion = (UIDevice.currentDevice().systemVersion as NSString).floatValue
        if currentVersion >= 8.0{
            var types:UIUserNotificationType = UIUserNotificationType.Badge | UIUserNotificationType.Alert | UIUserNotificationType.Sound
            var settings: UIUserNotificationSettings = UIUserNotificationSettings( forTypes: types, categories: nil )
            application.registerUserNotificationSettings( settings )
            application.registerForRemoteNotifications()
        }else{
            var types:UIRemoteNotificationType = UIRemoteNotificationType.Badge | UIRemoteNotificationType.Alert | UIRemoteNotificationType.Sound
            application.registerForRemoteNotificationTypes(types)
        }

        return true
    }
    
    func application(application: UIApplication, didRegisterUserNotificationSettings notificationSettings: UIUserNotificationSettings) {
            application.registerForRemoteNotifications()
    }
    
    func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
        var characterSet: NSCharacterSet = NSCharacterSet( charactersInString: "<>" )
        
        var deviceTokenString: String = ( deviceToken.description as NSString )
            .stringByTrimmingCharactersInSet( characterSet )
            .stringByReplacingOccurrencesOfString( " ", withString: "" ) as String
        
        println( deviceTokenString )
    }
    
    func application( application: UIApplication!, didFailToRegisterForRemoteNotificationsWithError error: NSError! ) {
        
        println( error.localizedDescription )
    }

サンプルコードを載せておきます。