[cpp]
?UIImage *im = [UIImage imageWithContentsOfFile:path];//通過path圖片路徑獲取圖片  
NSData *data = UIImagePNGRepresentation(im);//獲取圖片數據  
/*
 ios中獲取圖片的方法有兩種，一種是UIImageJPEGRepresentation ，一種是UIImagePNGRepresentation
 前者獲取到圖片的數據量要比後者的小很多。。
 */ 
NSMutableData *imageData = [NSMutableData dataWithData:data];//ASIFormDataRequest 的setPostBody 方法需求的為NSMutableData類型  
NSURL *url = [NSURL URLWithString:@"服務器地址"]; 
ASIFormDataRequest *aRequest = [[ASIFormDataRequest alloc] initWithURL:url]; 
[aRequest setDelegate:self];//代理  
 
[aRequest setRequestMethod:@"POST"]; 
[aRequest setPostBody:imageData]; 
[aRequest addRequestHeader:@"Content-Type" value:@"binary/octet-stream"];//這裡的value值 需與服務器端 一致  
 
[aRequest startAsynchronous];//開始。異步  
[aRequest setDidFinishSelector:@selector(headPortraitSuccess)];//當成功後會自動觸發 headPortraitSuccess 方法  
[aRequest setDidFailSelector:@selector(headPortraitFail)];//如果失敗會 自動觸發 headPortraitFail 方法  
[aRequest release];