Question

我正在寻求从iPhone SDK调用HTTP_POST到我服务器上的php文件。如果我在下面打电话：

NSMutableDictionary *requestDictionary = [NSMutableDictionary dictionary];
[requestDictionary setObject:@"testvalue" forKey:@"test"];
[requestDictionary setObject:@"test2value" forKey:@"test2"];
[requestDictionary setObject:@"test3value" forKey:@"test3"];

NSString *jsonString = [requestDictionary JSONRepresentation];
NSString *urlString = @"http://www.example.org";

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString]
                                                               cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                           timeoutInterval:CONNECTION_TIMEOUT];

NSData *requestData = [NSData dataWithBytes:[jsonString UTF8String] length:[jsonString length]];
[request setHTTPMethod:@"POST"];
[request setValue:[NSString stringWithFormat:@"%d", [requestData length]] forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody: requestData];

NSURLConnection *urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

我是否应该像这样接收这样的帖子数据（在php中）：

echo "Hello";

if(isset($_POST['test']))
{
    echo $_POST['test'];
}

编辑：

要测试，在我的connectionDidFinishLoading我只是记录整个回复

- (void)connectionDidFinishLoading:(NSURLConnection *)conn
{
    NSString *responseString = [[NSString alloc] initWithData:dataRecieved encoding:NSASCIIStringEncoding];
    [dataRecieved release];
    NSLog(@"Response: %@", responseString);
}

我在寻找帖子之前得到了回应，但没有别的。有谁知道我哪里出错了？

Answer 1

您的请求正文是JSON值，但您的服务器需要application/x-www-form-urlencoded个编码字段。

您可以将字典转换为具有以下类别的编码字段。

@interface NSDictionary (FormData)

- (NSString*) formUrlEncodedData;

@end
@implementation NSDictionary (FormData)

- (NSString*) formUrlEncodedData
{
    NSString *result = nil;

    for( NSString *k in [self keyEnumerator]) {
        if (![result isEqual:@""]) {
            result = [result stringByAppendingString:@"&"];
        }

        result = [result stringByAppendingString:[k stringByUrlEncoding]];
        result = [result stringByAppendingString:@"="];
        NSString *v = [self objectForKey:k];
        result = [result stringByAppendingString:[v stringByUrlEncoding]];
    }
    return result;
}

@end

其中stringByUrlEncoding由NSString上的类别提供，我从Cocoanetics采购。

@interface NSString (Helpers)

- (NSString*) stringByUrlEncoding;

@end
@implementation NSString (UrlEncoding)

- (NSString*) stringByUrlEncoding
{
    return (NSString*)CFURLCreateStringByAddingPercentEscapes(NULL,
                            (CFStringRef)self,
                            NULL,
                            (CFStringRef)@"!*'();:@&amp;=+$,/?%#[]",
                            kCFStringEncodingUTF8);
}

@end

Answer 2

您将在NSURLConnection委托方法中获得回复。一旦得到响应，您可以使用NSXMLParser来解析它并获取所需的字段。如果您需要其他相关信息，请与我们联系。将尝试发布一些相关的代码。

Answer 3

如果我可以给你一个建议。检查Facebook IOS SDK的源代码。这是学习新技术的好方法。

来自iPhone SDK的HTTP_POST使用JSON

3 个答案: