iOS用ASIHTTPRequest框架实现多张图片上传

iOS用ASIFormDataRequest实现图片上传

方法一：表单提交

     NSString *fileName = [[NSBundle mainBundle] pathForResource:@"color_blue" ofType:@"png"];
     ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL: [NSURL URLWithString: url]];
     //[request setPostValue:@"photo" forKey:@"type"];
     [request setFile:fileName forKey:@"image"];
 //    [request buildRequestHeaders];
 //    [request buildPostBody];
     [request setDelegate:delegate];
     [request setTimeOutSeconds:TIME_OUT_SECONDS];
     [request startAsynchronous];

方法二：POST:

[cpp]  view plain copy

 /*
  ios中获取图片的方法有两种，一种是UIImageJPEGRepresentation ，一种是UIImagePNGRepresentation
  前者获取到图片的数据量要比后者的小很多。。
 */
     UIImage *im = [UIImage imageNamed:@"color_blue"];//通过path图片路径获取图片
     NSData *data = UIImagePNGRepresentation(im);//获取图片数据

     NSMutableData *imageData = [NSMutableData dataWithData:data];//ASIFormDataRequest 的setPostBody 方法需求的为NSMutableData类型
     ASIFormDataRequest *aRequest = [[ASIFormDataRequest alloc] initWithURL:[NSURL URLWithString:url]];
     [aRequest setDelegate:delegate];//代理
     [aRequest setRequestMethod:@"POST"];

     [aRequest setPostBody:imageData];
     [aRequest addRequestHeader:@"Content-Type" value:@"image/png"];//这里的value值 需与服务器端 一致

     [aRequest startAsynchronous];//开始。异步

     [aRequest setDidFinishSelector:@selector(headPortraitSuccess)];//当成功后会自动触发 headPortraitSuccess 方法
     [aRequest setDidFailSelector:@selector(headPortraitFail)];//如果失败会 自动触发 headPortraitFail 方法