ios - 解析 : Sending push notication to a user

Question

我正在尝试向用户或所有用户列表发送推送通知。我可以使用以下代码段在 iOS 设备上成功发送(和接收):

// Create our Installation query
PFQuery *pushQuery = [PFInstallation query];
[pushQuery whereKey:@"deviceType" equalTo:@"ios"];

// Send push notification to query
[PFPush sendPushMessageToQueryInBackground:pushQuery
                               withMessage:@"Hello World!"];

但是这段代码不起作用:

PFQuery *userQuery = [PFUser query];
NSLog(@"findObjects: %@",[userQuery findObjects]);

[userQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
    NSLog(@"findObjectsInBackgroundWithBlock error: %@", error);
    NSLog(@"findObjectsInBackgroundWithBlock objects: %@", objects);   //this log indicated I do have one user named "user name"
}];

    PFQuery *pushQuery = [PFInstallation query];
//    [pushQuery whereKey:@"user" matchesQuery:userQuery];
    [pushQuery whereKey:@"username" containsString:@"user name"];   //neither one of these works


// Send push notification to query
[PFPush sendPushMessageToQueryInBackground:pushQuery
                               withMessage:@"for you only"];

在 parse.com 网站的推送通知仪表板上，它的状态为“完成”，但订阅者为 0。

有什么建议吗？

编辑:来自 Parse 仪表板的更多详细信息:

Answer 1

您必须像现在一样使用 PFUser 查询来查询您的用户。一旦找到您要向其发送推送的用户，您就必须使用该“PFUser 对象”来执行安装查询。 (您应该使用整个 PFUser 对象作为安装查询的键)

如果您想向一组用户发送推送，您必须设置 Parse 的“分割”并将用户分配到该分割。阅读 Parse iOS 推送文档 https://parse.com/docs/push_guide#top/iOS

这是向单个用户发送推送的示例:

PFQuery *qry = [PFUser query];
                [qry getObjectWithId: THE USERS OBJECT ID HERE ];

                PFQuery *pushQuery = [PFInstallation query];
                [pushQuery whereKey:@"user" matchesQuery:qry];

                // Send push notification to query
                PFPush *push = [[PFPush alloc] init];
                [push setQuery:pushQuery]; // Set our Installation query
                NSDictionary *data = [NSDictionary dictionaryWithObjectsAndKeys:
                                      @"A New Push Message was Put HERE!", @"alert",
                                      @"ursound.caf", @"sound",
                                      @"Increment", @"badge",
                                      @"Optionally a type was set", @"type",
                                      nil];
                [push setData:data];


                [push sendPushInBackground];

编辑 - 哦，假设我示例中的那些初始查询已经在后台任务中 -> 使用 getObjectInBackgroundWithId:^(bla bla.. ) 如果不在后台任务中运行它。