iOS通过Http 上传图片详解手机开发

- (NSMutableURLRequest *)PostImageRequest:(NSString *)URLString 

 UIImage:(UIImage*)image 

 parameters:(NSDictionary *)parameters 

 success:(void (^)(id))success 

 failure:(void (^)(NSError *))failure 

 _success = [success copy]; 

 _failure = [failure copy]; 

 //分界线的标识符 

 NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x"; 

 //根据url初始化request 

 _request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:URLString] 

 cachePolicy:NSURLRequestReloadIgnoringLocalCacheData 

 timeoutInterval:10]; 

 //分界线 --AaB03x 

 NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY]; 

 //结束符 AaB03x-- 

 NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary]; 

 //得到图片的data 

 NSData* data = UIImageJPEGRepresentation(image, 1); 

 //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keys 

 for(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=/"ImageField/"; filename=/"x1234.png/"/r/n"]; 

 //声明上传文件的格式 

 [body appendFormat:@"Content-Type: image/jpeg/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 body 

 NSMutableData *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", [myRequestData length]] forHTTPHeaderField:@"Content-Length"]; 

 //设置http body 

 [_request setHTTPBody:myRequestData]; 

 //http method 

 [_request setHTTPMethod:@"POST"]; 

 return _request; 

}

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