Objective C， "Call from Main Thread" 的正确方法？

Question

我知道大多数人都这样做 dispatchqueue.main.async 或 dispatch_async(dispatch_get_main_queue(), ^{ 但是从主线程调用 Objective C 的正确方法是什么？

具体来说，我想在查询代码中从主线程调用 textfieldview。

例如：

    NSString *qry = [NSString stringWithFormat:                         
                        @"SELECT [ID]        AS Identify          "
                         "     , Number     AS Zeros       "
                         "     , Facils AS Buildings          "
                         "  FROM tableTod                    "
                         "    WHERE Facils ='%@'               "

                     , self.websiteTextField.text
      ];

Answer 1

答案：

我通过实施分派异步代码找到了解决方案。它不是 SQL 注入。谢谢。