如何通过 NSURLConnection sendAsynchronousRequest 取消异步调用?

本文介绍了如何通过 NSURLConnection sendAsynchronousRequest 取消异步调用?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个 Web 服务调用实时对用户输入执行一些验证.我想在验证中使用 [NSURLConnection sendAsynchronousRequest] (在 iOS 5 中引入)，但如果用户同时更改输入字段内容，请取消它.取消当前请求的最佳方法是什么?

I've got a web service call performing some validation on user input in real time. I'd like to use [NSURLConnection sendAsynchronousRequest] on the validation (which was introduced in iOS 5), but cancel it if the user changes the input field content in the mean time. What is the best way to cancel a current request?

推荐答案

似乎没有什么好的方法可以做到这一点.解决方案似乎是在需要取消请求的情况下不使用新的 [NSURLConnection sendAsynchronousRequest] .

It doesn't appear that there is a good way to do this. The solution seems to be to not use the new [NSURLConnection sendAsynchronousRequest] in situations in which you need to cancel the request.