didReceiveRemoteNotification 将用户带到正确的视图

我有一个聊天应用程序，当发送新消息时，我的服务器会发送推送通知。我遇到的问题是如何将用户带到正确的视图？我正在发送一个channelID在推送通知中，但我如何检索它并将用户带入实际对话？

我使用此代码来检测何时单击推送通知

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    if ( application.applicationState == UIApplicationStateInactive || application.applicationState == UIApplicationStateBackground  )
    {
         //opened from a push notification when the app was on background
    }
}

如果您要发送channelID在推送通知中您可以检索channelID来自 userInfo 字典。 正如midhere所说——

1) 当应用程序在后台运行时 and 当应用程序在前台运行时 application:didReceiveRemoteNotification:方法将如下调用。

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
if ( application.applicationState == UIApplicationStateInactive)
     {
     //opened from a push notification when the app was on background

       NSString channelID = [[userInfo objectForKey:@"aps"] objectForKey:@"channelID"];
       NSLog(@"channelID->%@",channelID);
     }
  else if(application.applicationState == UIApplicationStateActive)
     {
     // a push notification when the app is running. So that you can display an alert and push in any view

       NSString channelID = [[userInfo objectForKey:@"aps"] objectForKey:@"channelID"];
       NSLog(@"channelID->%@",channelID);
     }
}

2) 当应用程序未启动时（关闭） than application:didFinishedLaunchWithOptions方法将被调用。

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  if (launchOptions != nil)
    {
         //opened from a push notification when the app is closed
        NSDictionary* userInfo = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
        if (userInfo != nil)
        {
            NSString channelID = [[userInfo objectForKey:@"aps"] objectForKey:@"channelID"];
            NSLog(@"channelID->%@",channelID);
        }

    }
     else{
             //opened app without a push notification.
         }
}