iOS通過http post上傳圖片

//ASIFormDataRequest方式 POST上傳圖片
-(NSDictionary )addPicWithDictionary:(NSDictionary )sugestDic{


NSDictionary *tempDic=nil;

NSString *url=[NSString stringWithFormat:@"http://182.50.0.62:8095/xianServer/upload/uploadImage?clientType=mobile"];

form = [[[ASIFormDataRequest alloc]
         initWithURL:[NSURL URLWithString:url]] autorelease];
[form setTimeOutSeconds:60.0];
form.delegate = self;
//添加拍照圖


//分界線的標識符 
NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x"; 
//分界線 --AaB03x 
NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY]; 
//結束符 AaB03x-- 
NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];
//添加拍照圖片
imageView.image=[UIImage imageNamed:@"btn_done_down@2x.png"];
NSData* data = UIImagePNGRepresentation(imageView.image);
NSLog(@"%@",data);
//http body的字符串  
NSMutableString *body=[[NSMutableString alloc]init];  
//參數的集合的所有key的集合  
NSArray *keys= [sugestDic allKeys];  

//遍歷keys  
for(int i=0;i<[keys count];i++)  
{  
    //得到當前key  
    NSString *key=[keys objectAtIndex:i];  
    //如果key不是pic，說明value是字符類型，比如name：Boris  
    if(![key isEqualToString:@"files"])
    {  
        //添加分界線，換行  
        [body appendFormat:@"%@\r\n",MPboundary];  
        //添加字段名稱，換2行  
        [body appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key];  
        //添加字段的值  
        [body appendFormat:@"%@\r\n",[sugestDic objectForKey:key]];              
    }  
}  
if (imageView.image) {
    ////添加分界線，換行  
    [body appendFormat:@"%@\r\n",MPboundary];
    //聲明pic字段，文件名為boris.png  
    [body appendFormat:@"Content-Disposition: form-data; name=\"files\"; filename=\"boris.png\"\r\n"];  
    //聲明上傳文件的格式  
    [body appendFormat:@"Content-Type: image/png\r\n\r\n"];
}

//聲明結束符：--AaB03x-- 
NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary]; 
//聲明myRequestData，用來放入http body 
NSMutableData *myRequestData=[NSMutableData data]; 
//將body字符串轉化為UTF8格式的二進制 
[myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]]; 
//將image的data加入 
[myRequestData appendData:data]; 
//加入結束符--AaB03x-- 
[myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];
//設置HTTPHeader中Content-Type的值 
NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];

[form addRequestHeader:@"Content-Type" value:content];
[form addRequestHeader:@"Content-Length" value:[NSString stringWithFormat:@"%d", [myRequestData length]]];
[form setRequestMethod:@"POST"];
[form startAsynchronous];
[form setDidFailSelector:@selector(requestBeFailed:)];
[form setDidFinishSelector:@selector(requestBeFinished:)];
// 解析取得的結果
return tempDic; 

}
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