如何根据 ASIHTTPRequest 执行不同的操作？

Posted 2023-03-12

【中文标题】如何根据 ASIHTTPRequest 执行不同的操作？

【英文标题】：How to do different actions depending on ASIHTTPRequest?

【发布时间】：2011-05-21 12:11:08

【问题描述】：

我正在使用 ASIFormDataRequest 将图像上传到 TwitPic，我得到了响应，从这里一切正常。但是在- (void)requestFinished:(ASIHTTPRequest *)request 上，我已经对 TwitLonger 响应采取了行动（可以正常工作）。现在我将如何根据响应的类型执行不同的操作？我尝试设置一个字符串并与if 进行比较，得到最后的响应，但没有运气。这是我尝试过的方式：

- (void)requestFinished:(ASIHTTPRequest *)request

    NSString *responseString = [request responseString];

    NSString *first = [responseString substringFromIndex: [responseString length] - 7];
    NSLog(@"%@", first);
    if (first == @"</rsp>"+
        ) 
        NSString *responseString = [request responseString];
        NSLog(@"%@", responseString);
        NSString *result = nil;
        // Determine "<div>" location
        NSRange divRange = [responseString rangeOfString:@"<mediaurl>" options:NSCaseInsensitiveSearch];
        if (divRange.location != NSNotFound)
        
            // Determine "</div>" location according to "<div>" location
            NSRange endDivRange;

            endDivRange.location = divRange.length + divRange.location;
            endDivRange.length   = [responseString length] - endDivRange.location;
            endDivRange = [responseString rangeOfString:@"</mediaurl>" options:NSCaseInsensitiveSearch range:endDivRange];

            if (endDivRange.location != NSNotFound)
            
                // Tags found: retrieve string between them
                divRange.location += divRange.length;
                divRange.length = endDivRange.location - divRange.location;

                result = [responseString substringWithRange:divRange];
            
            tweet.text = result;
            NSLog(@"%@", result);
        
     else 

    // Use when fetching text data
    NSString *responseString = [request responseString];
    NSLog(@"%@", responseString);
    NSString *result = nil;
        // Determine "<div>" location
        NSRange divRange = [responseString rangeOfString:@"<content>" options:NSCaseInsensitiveSearch];
        if (divRange.location != NSNotFound)
        
            // Determine "</div>" location according to "<div>" location
            NSRange endDivRange;

            endDivRange.location = divRange.length + divRange.location;
            endDivRange.length   = [responseString length] - endDivRange.location;
            endDivRange = [responseString rangeOfString:@"</content>" options:NSCaseInsensitiveSearch range:endDivRange];

            if (endDivRange.location != NSNotFound)
            
                // Tags found: retrieve string between them
                divRange.location += divRange.length;
                divRange.length = endDivRange.location - divRange.location;

                result = [responseString substringWithRange:divRange];
            
            tweet.text = result;
            [_engine setAccessToken:token];
            [_engine sendUpdate:tweet.text];
            [self.parentViewController dismissModalViewControllerAnimated:true];
        
    

这是响应的一个示例：

<?xml version="1.0" encoding="UTF-8"?>
<rsp stat="ok">
 <mediaid>50ia96</mediaid>
 <mediaurl>URL GOES HERE</mediaurl>
</rsp>

所以最后，我想要的是获取标签之间的 URL。

提前致谢！

【参考方案1】：

Go to their documentation，然后向下滚动到“在委托方法中处理多个请求的成功和失败”部分。它们为您提供了三种选择 - 大多数情况下，在您发出请求时设置 userInfo 字典就足够了，然后在您的回调中读取它并采取适当的措施。一些快速代码：

在创建和启动请求时设置：

request.userInfo = [NSDictionary dictionaryWithObjectsAndKeys: @"firstRequestId", @"id", nil];

然后在你的回调中：

if([[request.userInfo objectForKey:@"id"] isEqualToString:@"firstRequestId"]) 
  // Handle the request with id 'firstRequestId'

【讨论】：

感谢您的链接！我认为第一个选项（userInfo 选项）似乎是正确的，但我该怎么做呢？谢谢:)