a..<b 从a到b不包含b的区间
a...b a到b的闭区间
图片数组
let imageName = ["1", "2", "3", "4", "5"]
let images = imageName.map{(UIImage(named:$0))}
images
let image = images[0];
let imageView = UIImageView(frame: CGRectMake(0, 0, 750, 1334))
imageView.image = image
