Question

发送推送通知后，我希望应用程序在我的收件箱页面上打开，以便用户可以在收件箱中看到新消息。我的AppDelegate中有以下代码

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo{

    [self.tabController setSelectedIndex:2]; 
}

当我发送推送消息并且电话处于活动状态时，它会直接在那里发出警告。我知道它应该用我的代码做什么但是有办法改变它就像这样

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo{

    if(app.isActive == FALSE)
          [self.tabController setSelectedIndex:2]; 
}

对此的任何见解都将有很大帮助。谢谢！

Answer 1

来自Stanislav Yaglo，Objective C: How to check if application is currently active (i.e. user is using it)?：

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {

    if (application.applicationState == UIApplicationStateActive) {
        // For example, update the tab bar
    }
    else {
        self.tabController.selectedIndex = 3;
    }
}

希望它有所帮助！

Answer 2

进入应用程序后，您可以将bool设置为YES，只需将bool设置为：

- (void)applicationWillEnterForeground:(UIApplication *)application

并将bool设置为

中的NO

- (void)applicationDidEnterBackground:(UIApplication *)application

Answer 3

您可以通过检查applicationState来判断应用程序是否在前台：

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    if ( application.applicationState == UIApplicationStateActive )
        // app is in the foreground
    else
        // app was just brought from background to foreground
    ...
}

如果应用在推送通知上处于活动状态

3 个答案: