iOS uploads images via http post

The example of this article is to share the code of iOS uploading pictures through http post for your reference. The specific content is as follows

//ASIFormDataRequest way  POST To upload pictures 
-(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;
// Add a photo 
// The identifier of the boundary 
NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";
// Dividing line  --AaB03x
NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];
// terminator  AaB03x--
NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];
// Add photo photo 
imageView.image=[UIImage imageNamed:@"btn_done_down@2x.png"];
NSData* data = UIImagePNGRepresentation(imageView.image);
NSLog(@"%@",data);
//http body The string 
NSMutableString *body=[[NSMutableString alloc]init];
// All of the set of parameters key A collection of 
NSArray *keys= [sugestDic allKeys];
// traverse keys
for(int i=0;i<[keys count];i++)
{
// Get the current key
NSString *key=[keys objectAtIndex:i];
// if key not pic , value Is the character type, for example name : Boris
if(![key isEqualToString:@"files"])
{
// Add a line break 
[body appendFormat:@"%@\r\n",MPboundary];
// Add field name, replace 2 line 
[body appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key];
// Add the value of the field 
[body appendFormat:@"%@\r\n",[sugestDic objectForKey:key]];
}
}
if (imageView.image) {
//// Add a line break 
[body appendFormat:@"%@\r\n",MPboundary];
// The statement pic Field, file name boris.png
[body appendFormat:@"Content-Disposition: form-data; name=\"files\"; filename=\"boris.png\"\r\n"];
// Declare the format of the uploaded file 
[body appendFormat:@"Content-Type: image/png\r\n\r\n"];
}
// End of declaration: --AaB03x--
NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary];
// The statement myRequestData Used to put http body
NSMutableData *myRequestData=[NSMutableData data];
// will body String to UTF8 The format of 2 Into the system 
[myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];
// will image the data join 
[myRequestData appendData:data];
// Add end character --AaB03x--
[myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];
// Set up the HTTPHeader In the Content-Type The value of the 
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:)];
//  Parse the results obtained 
return tempDic;
}

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