如何在 iPhone 中取消 ASIFormDataRequest

Question

如何使用块取消 ASIFormDataRequest？。

__block ASIFormDataRequest *req = [ASIFormDataRequest requestWithURL:url];  

[req appendPostData:[str dataUsingEncoding:NSUTF8StringEncoding]];
[req setDelegate:self];
[req setCompletionBlock:^{
    [self parseResult:req];
}];
[req setFailedBlock:^{
    [self requestWentWrong:req];
}];
[req setTag:tag];
[req startAsynchronous];

有没有办法在按钮操作中取消这个请求？

Answer 1

将此代码添加到您的按钮操作事件中，因为 req 是类成员变量：

-(IBAction)YourbuttonactionEvent
{ 
  if(![req isCancelled]) 
  {
    // Cancels an asynchronous request
    [req cancel];
    // Cancels an asynchronous request, clearing all delegates and blocks first
    [req clearDelegatesAndCancel];
}