提取“警报"来自推送通知的文本 [英] Extract "alert" text from push notification

问题描述

我在我的应用程序委托文件中放置了以下代码.从理论上讲，它应该从推送通知中提取消息并将其显示在 UIAlertview 中 - 但它只显示标题和蜡烛按钮，仅此而已.有人能看出我哪里出错了吗?

I have the following code placed in my app delegate file. In theory, it should be extracting the message from the push notification and displaying it in a UIAlertview - yet it displays the title and the candle button, and nothing else. Can anybody see where I am going wrong?

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
    [PFPush handlePush:userInfo];
    pushText = [userInfo objectForKey:@"alert"];
    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:NSLocalizedString(@"News", "")
                          message:pushText
                          delegate:nil
                          cancelButtonTitle:@"Ok"
                          otherButtonTitles: nil];
    [alert show];
}

推荐答案

push payload 的结构如下:

The push payload has the following structure:

{
    "aps" : {
             "alert" : "Push notification text"
             }
}

所以你需要先拉出aps"字典，然后你才能检索到alert"键的值:

So you need to pull out the "aps" dictionary first and then you can retrieve the value for the "alert" key:

 pushText = [[userInfo objectForKey:@"aps"] objectForKey:@"alert"];

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