iphone - 重定向 UIAlertView 按钮推送通知

Question

我看了很多关于这个问题的帖子，但没有一个能真正帮助我。这似乎很容易做到，但不知何故我想不通。

我想在这里做什么？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。但是另一种状态——应用程序在前台——让我很头疼。

我有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，用户将获得 UIAlertview。但是如何向 View 按钮添加一个 Action 呢？我的意思是这个特定的 Action :当有人点击查看按钮时，他/她将被重定向到已通过推送通知传递的 url。

就像我之前在代码片段中使用的一样(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，并且有人可以帮助我。我迷路了……这是与该主题相关的完整代码片段。

-(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，这样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
        }
    }