iOS通过http post上传图片

本文实例为大家分享了ios通过http post上传图片的相关代码，供大家参考，具体内容如下

//asiformdatarequest方式 post上传图片
-(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;
//添加拍照图
//分界线的标识符
nsstring *twitterfon_form_boundary = @"aab03x";
//分界线 --aab03x
nsstring *mpboundary=[[nsstring alloc]initwithformat:@"--%@",twitterfon_form_boundary];
//结束符 aab03x--
nsstring *endmpboundary=[[nsstring alloc]initwithformat:@"%@--",mpboundary];
//添加拍照图片
imageview.image=[uiimage imagenamed:@"[e-mail]"];
nsdata* data = uiimagepngrepresentation(imageview.image);
nslog(@"%@",data);
//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= [sugestdic 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:@"files"])
{
//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",[sugestdic objectforkey:key]];
}
}
if (imageview.image) {
////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=\"files\"; filename=\"boris.png\"\r\n"];
//声明上传文件的格式
[body appendformat:@"content-type: image/png\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];
[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:)];
// 解析取得的结果
return tempdic;
}

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