需求：上传一张照片和内容，内容包括：用户编辑的内容、经纬度、地点等等，就是类似发一个说说。这就是一个很平常的功能，实现的方式想必各位能想到很多。
接下来我想用系统的NSURLConnection来实现这个功能：
首先我们要定义一个全局变量:
/** * 请求返回数据 */@property (nonatomic, strong) NSMutableData *mResponseData;
实现代码：
//字典里面装的是你要上传的内容NSDictionary *parameters = @{@"content": @"这是刚刚在线的官方网站www.superqq.com"};//上传的接口NSString* urlstring = @"http://superqq.com/";//分界线的标识符NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";//根据url初始化requestNSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlstring] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10];//分界线 --AaB03xNSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];//结束符 AaB03x--NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];// //要上传的图片// UIImage *image=[params objectForKey:@"pic"];//得到图片的dataNSData *data = UIImagePNGRepresentation(self.image);//http body的字符串NSMutableString *body=[[NSMutableString alloc]init];//参数的集合的所有key的集合NSArray *keys= [parameters allKeys];//遍历keysfor(int i=0;i<[keys count];i++){ //得到当前key NSString *key=[keys objectAtIndex:i]; //如果key不是pic，说明value是字符类型，比如name：Boris if(![key isEqualToString:@"pic"]) { //添加分界线，换行 [body appendFormat:@"%@\r\n",MPboundary]; //添加字段名称，换2行 [body appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key]; //添加字段的值 [body appendFormat:@"%@\r\n",[parameters objectForKey:key]]; }}添加分界线，换行[body appendFormat:@"%@\r\n",MPboundary];//声明pic字段，文件名为boris.png[body appendFormat:@"Content-Disposition: form-data; name=\"pic\"; filename=\"boris.png\"\r\n"];//声明上传文件的格式[body appendFormat:@"Content-Type: image/png\r\n\r\n"];//声明结束符：--AaB03x--NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary];//声明myRequestData，用来放入http bodyNSMutableData *myRequestData=[NSMutableData data];//将body字符串转化为UTF8格式的二进制[myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];//将image的data加入[myRequestData appendData:data];//加入结束符--AaB03x--[myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];//设置HTTPHeader中Content-Type的值NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];//设置HTTPHeader[request setValue:content forHTTPHeaderField:@"Content-Type"];//设置Content-Length[request setValue:[NSString stringWithFormat:@"%d", (int)[myRequestData length]] forHTTPHeaderField:@"Content-Length"];//设置http body[request setHTTPBody:myRequestData];//http method[request setHTTPMethod:@"POST"];//建立连接，设置代理NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];//设置接受response的dataif (conn) { _mResponseData = [[NSMutableData alloc] init];} NSURLConnectionDelegate的代理方法：
#pragma mark - NSURLConnectionDelegate- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{ [_mResponseData setLength:0];}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{ [_mResponseData appendData:data];}- (void)connectionDidFinishLoading:(NSURLConnection *)connection{ NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:_mResponseData options:kNilOptions error:nil]; NSLog(@"%@", dic);}- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{ NSLog(@"Error: %@", error);}
在不同的系统中，\t\n ,\t,\n这三个有不同的含义，在这里，\t\n相当于用键盘的回车键进行换行
Posted by 李刚 Dec 11th, 2014 10:00 am