iOS：推送通知仅在应用程序在前台运行时才起作用
我有 2 部 iPhone，正在测试 Apple 推送通知。
当我的应用程序在两个设备上的前台运行时，它们完美地工作。但如果我通过单击“主页”按钮将其关闭，我将不再收到通知。
系统不显示通知弹出窗口。我认为这并不取决于我的应用程序代码...
到目前为止，我已经实现了
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
，并且当应用程序位于前台时效果很好。 我也实现了：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
但 launchOptions 从未包含通知。但是，我想这是正确的，因为当我选择我从未见过的通知警报按钮时，会调用最后一个方法...
谢谢
I have 2 iPhones and I'm testing Apple push notifications.
They perfectly work when my app is running in foreground on both devices. But if I close it, by clicking on the Home button, I don't receive the notifications anymore.
The system doesn't show the notification popup. And I think this doesn't depend on my app code...
So far I've implemented
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
and it works great when the app is in foreground.
I've also implemented:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
but the launchOptions never contain the notification. However, this is correct, I guess, because the last method is invoked when I select a button of a notification alert that I never see...
thanks
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当您调用方法
- (void)registerForRemoteNotificationTypes:(UIRemoteNotificationType)types时，您应该指示适当的参数类型。如果您想在系统收到设备的推送通知时显示警报，那么您应该传递UIRemoteNotificationTypeAlert。您还可以组合类型并将其传递到该参数中：UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeSound UIRemoteNotificationTypeBadge。
When you call method
- (void)registerForRemoteNotificationTypes:(UIRemoteNotificationType)typesyou should indicate appropriate type of argument. If you want to display alert when system receive push-notification for your device then you should passUIRemoteNotificationTypeAlert.Also you can combine types and pass it in that argument:
UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeBadge.