IOS 使用 HTTP POST 上传图片和文本信息

[代码] [C/C++]代码

[request setValue:contentType forHTTPHeaderField: @"Content-Type"];// post bodyNSMutableData *body = [NSMutableData data];// add params (all params are strings)for (NSString *param in _params) {    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", BoundaryConstant] dataUsingEncoding:NSUTF8StringEncoding]];    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]];    [body appendData:[[NSString stringWithFormat:@"%@\r\n", [_params objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]];}// add image dataNSData *imageData = UIImageJPEGRepresentation(imageToPost, 1.0);if (imageData) {    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", FileParamConstant] dataUsingEncoding:NSUTF8StringEncoding]];    [body appendData:[[NSString stringWithString:@"Content-Type: image/jpeg\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];    [body appendData:imageData];    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];}[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];// setting the body of the post to the reqeust[request setHTTPBody:body];// set the content-lengthNSString *postLength = [NSString stringWithFormat:@"%d", [body length]];[request setValue:postLength forHTTPHeaderField:@"Content-Length"];// set URL[request setURL:requestURL];