objective-c - How to display the data image received by iOS through GCDAsyncSocket

Question

iOS receives data through GCDAsyncSocket. How to display the image?
A picture receives a lot of data. I spliced ​​the data but used the imageWithData method to not display the picture.
image is nil
UIImage *image = [ UIImage imageWithData:self.downloadImageData];

Answer 1

The method is correct, but there is something wrong with the splicing method