iphone - 重定向 UIAlertView 按钮推送通知

Question

我读过很多关于这个问题的帖子，但没有一个能真正帮助我。看起来很容易做到，但不知何故我无法弄清楚。

我在这里想做什么？ 好吧，我向我的应用程序发送推送通知。一切正常。 当它在后台、不活动甚至应用程序未运行时我都可以处理它。 但另一种状态——应用程序在前台——让我头疼。

我有我正在使用的代码片段。一切都很好。 当应用程序在前台运行时，用户会获取 UIAlertview。 但是如何向 View 按钮添加操作呢？ 我的意思是这个特定的操作:当有人点击查看按钮时，他/她会被重定向到通过推送通知传递的网址。

就像我之前在代码片段中使用的那样(准确地说是这部分):

NSString *notifUrl = [apsInfo objectForKey:@"url"];
NSLog(@"Received Push Url: %@", notifUrl);

我希望这是有道理的，有人可以帮助我。我迷失了这个……这是与该主题相关的整个代码片段。

-(void)Redirect:(NSString*)url{
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
    NSLog(@"%@",url);
}     

/**
     * Remote Notification Received while application was open.
     */
    - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {

    #if !TARGET_IPHONE_SIMULATOR

        NSLog(@"remote notification: %@",[userInfo description]);
        NSDictionary *apsInfo = [userInfo objectForKey:@"aps"];

        NSString *alert = [apsInfo objectForKey:@"alert"];
        NSLog(@"Received Push Alert: %@", alert);

        NSString *sound = [apsInfo objectForKey:@"sound"];
        NSLog(@"Received Push Sound: %@", sound);
        AudioServicesPlayAlertSound(kSystemSoundID_Vibrate);

        NSString *badge = [apsInfo objectForKey:@"badge"];
        NSLog(@"Received Push Badge: %@", badge);
        application.applicationIconBadgeNumber = [[apsInfo objectForKey:@"badge"] integerValue];

        NSString *notifUrl = [apsInfo objectForKey:@"url"];
        NSLog(@"Received Push Url: %@", notifUrl);

        // app was already in the foreground
        if ( application.applicationState == UIApplicationStateActive ) {

            UIAlertView *alertPush = [[UIAlertView alloc]initWithTitle: @"Message"
                                                           message: alert
                                                          delegate: self
                                                 cancelButtonTitle:@"View"
                                                 otherButtonTitles: @"Cancel", nil];

            [alertPush show];
            [alertPush release];
        }
        // app is inactive or in the background
        else {
            [self Redirect:notifUrl];
        }

    #endif
    }

    // what to do if user taps the viewbutton in push notification alert view
    - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
        if(buttonIndex == 0) {

            NSLog(@"View Button has been tapped");
            // We need the url that has been passed by the push notification


        }
        else {
            // Do something
        }
    }

Answer 1

只需在 .h 文件中定义变量 notifUrl ，以便您也可以在类的其他方法中访问它。然后将 url 存储在该变量中并在 Alertview 委托(delegate)方法中使用它。

//Add this in .h file
NSString *notifUrl;

//Add this in .m file

-(void)Redirect:(NSString*)url{
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
    NSLog(@"%@",url);
}     

/**
     * Remote Notification Received while application was open.
     */
    - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {

    #if !TARGET_IPHONE_SIMULATOR

        NSLog(@"remote notification: %@",[userInfo description]);
        NSDictionary *apsInfo = [userInfo objectForKey:@"aps"];

        NSString *alert = [apsInfo objectForKey:@"alert"];
        NSLog(@"Received Push Alert: %@", alert);

        NSString *sound = [apsInfo objectForKey:@"sound"];
        NSLog(@"Received Push Sound: %@", sound);
        AudioServicesPlayAlertSound(kSystemSoundID_Vibrate);

        NSString *badge = [apsInfo objectForKey:@"badge"];
        NSLog(@"Received Push Badge: %@", badge);
        application.applicationIconBadgeNumber = [[apsInfo objectForKey:@"badge"] integerValue];

        //Define this variable in .h file so that you can access this in other methods as well
        notifUrl = [apsInfo objectForKey:@"url"];
        NSLog(@"Received Push Url: %@", notifUrl);
        [notifUrl retain];    // this is retain value of notifUrl so that you can use it later
        // app was already in the foreground
        if ( application.applicationState == UIApplicationStateActive ) {

            UIAlertView *alertPush = [[UIAlertView alloc]initWithTitle: @"Message"
                                                           message: alert
                                                          delegate: self
                                                 cancelButtonTitle:@"View"
                                                 otherButtonTitles: @"Cancel", nil];

            [alertPush show];
            [alertPush release];
        }
        // app is inactive or in the background
        else {
            [self Redirect:notifUrl];
        }

    #endif
    }

    // what to do if user taps the viewbutton in push notification alert view
    - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
        if(buttonIndex == 0) {

            NSLog(@"View Button has been tapped");
            NSLog(@"Received Push Url: %@", notifUrl);
           [self Redirect:notifUrl];
        }
        else {
            // Do something
        }
    }