Question

我想做以下事情：我正在创建一个ASIFormDataRequest，我想在完成后调用一个新的：

所以我的代码看起来像这样：

 ASIFormDataRequest *request=[ASIFormDataRequest requestWithURL:url];
    [request setDelegate:self];
    [request setPostValue:mail forKey:@"email"];
    [request setPostValue:cod forKey:@"code"];
    [request setPostValue:tab forKey:@"table"];
    [request setPostValue:name forKey:@"name"];
    [request startAsynchronous];

- (void)requestFinished:(ASIHTTPRequest *)request
{
   //request 1 is done, invoke request 2
 ASIFormDataRequest *request_2=[ASIFormDataRequest requestWithURL:url];
    [request_2 setDelegate:self];
    [request_2 setPostValue:other_data forKey:@"info"];
    [request_2 setPostValue:phone forKey:@"phone"];
    [request startAsynchronous];
}

我不知道我必须在requestFinished中放置什么才能确定哪两个请求已经完成？或者如果还有其他方法可以这样做？

Answer 1

ASIFormDataRequest扩展了ASIHTTPRequest类，它的“tag”属性为NSInteger类型。

您可以为您的请求设置不同的代码，当您收到回复时，您可以检查该请求的代码是什么。

这使你能够确定它是哪一个。

Answer 2

您可以在完成不同的请求时调用不同的方法。

ASIFormDataRequest *request=[ASIFormDataRequest requestWithURL:url];
[request setDelegate:self];
[request setDidFinishSelector:@selector(firstRequestFinished:)];

- (void)firstRequestFinished:(ASIHTTPRequest *)request
{
   //request 1 is done, invoke request 2
    ASIFormDataRequest *request_2=[ASIFormDataRequest requestWithURL:url];
    [request_2 setDelegate:self];
    // Work with your request, and then
    [request setDidFinishSelector:@selector(secondRequestFinished:)];
    [request startAsynchronous];
}

- (void)secondRequestFinished:(ASIHTTPRequest *)request
{
   //request 2 is done, invoke request 3
    ASIFormDataRequest *request_3=[ASIFormDataRequest requestWithURL:url];
    [request_3 setDelegate:self];
    // Work with your request, and then
    [request setDidFinishSelector:@selector(thirdRequestFinished:)];
    [request startAsynchronous];
}

- (void)thirdRequestFinished:(ASIHTTPRequest *)request
{
   // Do whatever should be done now.
}

Answer 3

由于您的请求是按顺序执行的，因此维护一个整数实例变量/属性就足够了，该变量/属性在您启动第一个请求时设置为零，并在requestFinished中递增。

已添加：您的代码中也存在错误：在requestFinished中，您应该使用[request_2 startAsynchronous];启动新请求，而不是重新启动上一个请求。< / p>

Answer 4

如果seconde请求不使用第一个请求的结果，您可以将所有请求放在队列中：

[self setNetworkQueue:[ASINetworkQueue queue]];
[[self networkQueue] setDelegate:self];
[[self networkQueue] setRequestDidFinishSelector:@selector(requestInQeuFinished:)];
[[self networkQueue] setRequestDidFailSelector:@selector(requestFailed:)];
[[self networkQueue] setQueueDidFinishSelector:@selector(queueFinished:)];

for (NSString *tmpDic in array) 
{
    ASIHTTPRequest *link= [ASIHTTPRequest requestWithURL:[NSURL URLWithString:@"link"]];
    [[self networkQueue] addOperation:request];
}

[[self networkQueue] go];

除了Martin R responece之外，您还可以使用[[self networkQueue] requestsCount]获取requestInQeuFinished:中 REST 的请求数。

在第一个完成iOS时发出另一个http请求

4 个答案: