解析Hello World警告 - 正在主线程上执行长时间运行的操作

Question

我收到以下错误：

  

警告：正在执行长时间运行的操作   线。打破warnBlockingOperationOnMainThread（）进行调试。

代码如下：

- (IBAction)createButtonClicked:(id)sender {
    PFObject *demoObject = [PFObject objectWithClassName:
                            @"Demo"]; // 1
    [demoObject setObject:@"data value" forKey:@"dataColumn"]; // 2
    [demoObject save]; // 3
}

Answer 1

请尝试这种方式，

 PFObject * demoObject = [PFObject objectWithClassName:@"Demo"];
    demoObject[@"dataColumn"] = @"data value";

[demoObject saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
     {
         // take any action after saving.
}];