Question

我正在尝试从已发送的parse.com中检索数据。

我正在使用以下代码发送数据：

-(IBAction)msgSend:(id)sender {
    PFObject *appMsg = [PFObject objectWithClassName:@"appMsg"];
    appMsg[@"besked"] = msg.text;
    [appMsg saveInBackground];
    msg.text = @"";
}

要获取数据我正在尝试这个：

PFQuery *query = [PFQuery queryWithClassName:@"appMsg"];
    [query getObjectInBackgroundWithId:@"*******" block:^(PFObject *appMsg, NSError *error) {
        NSString *besked = appMsg[@"besked"];
        msgRecieved.text = besked;
    }];

最后我试图将数据显示到textView。

我真的没有加载任何数据吗？

Answer 1

 PFQuery *query = [PFQuery queryWithClassName:@"tempClass"];
    [query orderByDescending:@"createdAt"];
    query.limit =10;
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
      if (!error) {
        // Retrive values like below,object id is retrieved by objects.objectId
         NSLog(@"Object values %@",[objects valueForKey:@"columnName"]);
      } else {
        // Log details of the failure
        NSLog(@"Error: %@ %@", error, [error userInfo]);
      }
    }];

从parse.com检索数据并显示它们

1 个答案: