let imageview = UIImageView(frame: CGRectMake(10.0,10.0,100.0,100.0))
self.view.addSubview(imageview)
imageview.backgroundColor = UIColor.yellowColor()
        
imageview.image = UIImage(named: "normalImage")
imageview.contentMode = UIViewContentMode.Center
        
imageview.userInteractionEnabled = true
imageview.hidden = false

// 实例化方法2 highlightedImage、highlighted属性
let imageview02 = UIImageView(image: UIImage(named: "normalImage"),highlightedImage: UIImage(named: "hightImage"))
self.view.addSubview(imageview02)
imageview02.backgroundColor = UIColor.greenColor()
imageview02.frame = CGRectMake(10.0,120.0,100.0)
imageview02.highlighted = true

// 实例化方法3
let imageview03 = UIImageView(image: UIImage(named: "normalImage"))
self.view.addSubview(imageview03)
imageview03.backgroundColor = UIColor.redColor()
imageview03.frame = CGRectMake(0.0,0.0,100.0)
imageview03.center = CGPointMake(CGRectGetWidth(self.view.bounds) / 2,CGRectGetHeight(self.view.bounds) / 2)
// 动画图片属性
imageview03.animationDuration = 1
imageview03.animationRepeatCount = 0
imageview03.animationImages = [UIImage(named: "normalImage")!,UIImage(named: "hightImage")!]
imageview03.startAnimating()