1.新建一个single view工程，导入ASIHttpRequest库，导入MobileCoreServices,SystemConfiguration和libz1.2.5.dylib
2.随便导入一张图片
3.在VC中
NSURL* url = [NSURL URLWithString:@"..."];//请求的url
UIImage* img = [UIImage imageNamed:@"XXX.png"];
NSData* data = UIImagePNGRepresentation(img);
//请求是post请求
ASIFormDataRequest* request = [ASIFormDataRequest requestWithURL:url];
//请求的代理 签代理
request.delegate = self;
[request setPostValue:self.m_auth forKey:@"m_auth"];
// [request setFile:@"OOO.png" forKey:@"XXX"];
[request setData:data withFileName:@"tmp.png"andContentType:@"image/png"forKey:@"headimage"];
[request startAsynchronous];
