iphone網路互動json實現

/** * url:請求地址 * verb:請求方式 * parameters:請求參數 */+(NSString *)sendRequestTo:(NSURL *)url usingVerb:(NSString *)verb withParameters:(NSDictionary *)parameters{    NSString *jsonStr = nil;    NSData *body = nil;    NSMutableString *params = nil;    NSString *contentType = @"text/html; charset=utf-8";    NSURL *finalURL = url;    if(nil != parameters){        params = [[NSMutableString alloc] init];        for(id key in parameters){            NSString *encodedkey = [key stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];            CFStringRef value = (CFStringRef)[[parameters objectForKey:key] copy];            CFStringRef encodedValue = CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, value,NULL,(CFStringRef)@";/?:@&=+$", kCFStringEncodingUTF8);            [params appendFormat:@"%@=%@&", encodedkey, encodedValue];            CFRelease(value);            CFRelease(encodedValue);        }        [params deleteCharactersInRange:NSMakeRange([params length] - 1, 1)];    }    //    if([verb isEqualToString:@"POST"]){        contentType = @"application/x-www-form-urlencoded; charset=utf-8";        body = [params dataUsingEncoding:NSUTF8StringEncoding];    }else{        if(nil != parameters){            NSString *urlWithParams = [[url absoluteString] stringByAppendingFormat:@"?%@", params];            finalURL = [NSURL URLWithString:urlWithParams];        }    }    NSMutableDictionary *headers = [[[NSMutableDictionary alloc] init] autorelease];    [headers setValue:contentType forKey:@"Content-Type"];    [headers setValue:@"text/html" forKey:@"Accept"];    [headers setValue:@"no-cache" forKey:@"Cache-Control"];    [headers setValue:@"no-cache" forKey:@"Pragma"];    [headers setValue:@"close" forKey:@"Connection"];    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:finalURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];    [request setHTTPMethod:verb];    [request setAllHTTPHeaderFields:headers];    if(nil != parameters){        [request setHTTPBody:body];    }    [params release];    //    NSURLResponse *response;    NSError *error = nil;    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];    if(error){        NSLog(@"something is wrong: %@", [error description]);    }else{        if(responseData){            jsonStr = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];        }    }    return  jsonStr;}+(void)testRequest{    NSLog(@"test request...");    NSString *getUrl = @"http://192.168.222.1:8080/vgirl/isVgirl.php";    NSString *postUrl = @"http://192.168.222.1:8080/vgirl/isVgirlByPost.php";    NSMutableDictionary *dlist = [[NSMutableDictionary alloc] init];    [dlist setObject:@"pig" forKey:@"uid"];    [dlist setObject:@"access token" forKey:@"AccessToken"];    [dlist setObject:@"access token secret" forKey:@"AccessTokenSecret"];    NSString *jsonStrGet = [NetAPI sendRequestTo:[NSURL URLWithString:getUrl] usingVerb:@"GET" withParameters:dlist];    NSLog(@"do get: jsonStrGet = %@", jsonStrGet);    NSString *jsonStrPost = [NetAPI sendRequestTo:[NSURL URLWithString:postUrl] usingVerb:@"POST" withParameters:dlist];    NSLog(@"do post: jsonStrPost = %@", jsonStrPost);    [dlist release];}