iPhone 中的其余 Web 服务

Question

我现在有问题。我需要将 transactionID 和用户密码传递给休息服务，并且它应该返回 true/false 值（以 XML 格式）。然而，它一直在返回我（空）..我完全迷失了，请帮忙。

    NSString *urlString = [NSString stringWithFormat:@"https://10.124.128.93:8443/axis2/services/C3WebService/completeWithdrawal  Transaction?transactionId=%@&password=%@", _transactionID.text, _userPassword.text];

    NSURL *url = [[NSURL alloc] initWithString:urlString];
    NSString *result = [[NSString alloc] initWithContentsOfURL:url];


    NSLog(@"%@",result );

我的结果不断地返回空值。我如何从这里继续？

Answer 1

.h:
    NSMutableData *responseData;

.m:
    - (void)load {
        NSURL *myURL = [NSURL URLWithString:@"https://10.124.128.93:8443/axis2/services/C3WebService/completeWithdrawal  Transaction?transactionId=%@&password=%@", _transactionID.text, _userPassword.text];
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:myURL
                                                 cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                                             timeoutInterval:60];

    [[NSURLConnection alloc] initWithRequest:request delegate:self];
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    responseData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [responseData appendData:data];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
    [responseData release];
    [connection release];
    [textView setString:@"Unable to fetch data"];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{
    NSLog(@"Succeeded! Received %d bytes of data",[responseData
                      `enter code here`                             length]);
    NSString *txt = [[[NSString alloc] initWithData:responseData encoding: NSASCIIStringEncoding] autorelease];

}

Answer 2

考虑使用 NSURLConnection，它具有结果回调和获取详细错误详细信息的回调。它也不会在 UI 线程上执行（在请求期间不会挂起 UI）。

 NSURL *url = [NSURL URLWithString:@"http://www.mysite.com"];

 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];

 [request setHTTPMethod:@"GET"];
 [[NSURLConnection alloc] initWithRequest:request delegate:self];

然后你可以实现委托方法来获取错误、数据和其他详细信息：

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [responseData appendData:data];
}

- (void) connectionDidFinishLoading:(NSURLConnection *)connection {
    [connection release];

    NSString* responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
    NSLog(@"result: %@", responseString);

    [responseString release];
}

- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
      NSLog(@"error - read error object for details");
}

Answer 3

您可以尝试使用“initWithContentsOfURL:encoding:error:”代替并检查“error”。另外，使用 Charles 或其他 http 嗅探器并将结果与​​直接浏览器请求进行比较（您是否在浏览器中检查结果？）