ios - 在Objective c iOS 11中静默通知显示标题中的错误

Question

我正在ios 11的Objective c代码中实现无提示通知。通过添加此方法使用FCM通知。
What is Silent Push Notification? When does the device receive it?

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))handler
{

   //Success
    handler(UIBackgroundFetchResultNewData);
}

薪水是:

    {
    "aps" = {
        "content-available" : 1,
        "sound" : ""
    };
    // You can add custom key-value pair here...
}

接收到通知时调用 didReceiveRemoteNotification方法，但是我的问题是，为什么在接收无提示通知时看到横幅。如何限制通知横幅。

Answer 1

从aps数组中删除多余的键，有效载荷应该是这样的。

"aps" = {
    "content-available" : 1
};