How to upload multiple files in iOS development

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NSURL * url = [NSURL URLWithString: @ "xxx"];
ASIFormDataRequest * request = [ASIFormDataRequest requestWithURL: url];
Request. uploadProgressDelegate = viewPost. progressView;
Request. showAccurateProgress = YES;
Request. shouldContinueWhenAppEntersBackground = YES;

If ([imageArray count]> 0)
{
[Request setPostFormat: ASIMultipartFormDataPostFormat];
For (NSData * data in imageArray ){
NSInteger idx = [imageArray indexOfObject: data];
[Request addData: data withFileName: [NSString stringWithFormat: @ "image%d.png", idx] andContentType: @ "image/png" forKey: @ "photos []"];
}
}

NSURL * url = [NSURL URLWithString: @ "xxx"];
ASIFormDataRequest * request = [ASIFormDataRequest requestWithURL: url];
Request. uploadProgressDelegate = viewPost. progressView;
Request. showAccurateProgress = YES;
Request. shouldContinueWhenAppEntersBackground = YES;

If ([imageArray count]> 0)
{
[Request setPostFormat: ASIMultipartFormDataPostFormat];
For (NSData * data in imageArray ){
NSInteger idx = [imageArray indexOfObject: data];
[Request addData: data withFileName: [NSString stringWithFormat: @ "image%d.png", idx] andContentType: @ "image/png" forKey: @ "photos []"];
}
}