How to display images of type .jpeg or .gif or .tiff in iphone sdk using objective-c

Question

I am facing a problem while displaying the image in iphone. I used the below code but it work only for .png files.

  UIImageView* imageView=[[UIImageView alloc] initWithFrame:CGRectMake(6,10, 80, 80)];
  imageView.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:customerListObject.customerImage]]];
  [myView addSubview:imageView];
  [imageView release];

I could not display the other types of image file, Please suggest me the solution.