Question

我现在明白了，感谢@dbarthelemy。但是这里现在是我的代码，我收到错误/终止no＆＃34;结果与查询匹配＆＃34;：

- (IBAction)createGroup:(id)sender {
    PFObject *message = [PFObject objectWithClassName:@"Messages"];
    [message setObject:self.recipients forKey:@"recipientIds"];
    [message saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
        if (error) {
            NSLog(@"Error %@ %@", error, [error userInfo]);
        }
        else [self performSegueWithIdentifier:@"showDate" sender:self];
    }];
}

然后在第二个控制器上：

PFQuery *message = [PFQuery queryWithClassName:@"Message"];
            [message getObjectInBackgroundWithId:@"recipientIds" block:^(PFObject     *message, NSError *error) {
                [message setObject:file forKey:@"file"];
                [message setObject:fileType forKey:@"fileType"];
                [message setObject:[[PFUser currentUser] objectId] forKey:@"senderId"];
                [message setObject:[[PFUser currentUser] username] forKey:@"senderName"];
                [message saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {

Answer 1

在createGroup：方法中，请确保使用其中一种保存方法将PFObject保存到Parse（例如saveInBackgroundWithBlock :)。

- (IBAction)createGroup:(id)sender {
PFObject *message = [PFObject objectWithClassName:@"Message"];
[message setObject:self.recipients forKey:@"recipientIds"];
[message saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {

然后使用单独的viewController类（使用属性）共享PFObject，然后使用此指针设置其他PFObject属性（而不是使用objectWithClassName创建新的PFObject :)。设置了其他属性后，不要忘记保存更新的PFObject。

[self.message setObject:file forKey:@"file"];
[self.message setObject:fileType forKey:@"fileType"];
[self.message setObject:[[PFUser currentUser] objectId] forKey:@"senderId"];
[self.message setObject:[[PFUser currentUser] username] forKey:@"senderName"];
[self.message saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {

注意：如果您无法在各种视图控制器之间可靠地共享PFObject指针，则可以在Parse服务器上执行PFQuery以检索您的对象（假设您可以构建正确的查询）。

如何在不创建全新PFObject的情况下向PFObject添加信息？

1 个答案: