汤姆猫的小游戏，当我触发某个指令时，比如喝牛奶、吃东西等，会产生一个动画。今天我们来学习如何用帧动画来实现。
帧动画我们应该知道，这是播放动画的一般方法，通过在短时间内播放一组连续的图片来达到动画效果。
下面实例中只演示喝牛奶、吃东西这俩个动画，其他动画原理一样：
import UIKitclass ViewController: UIViewController {//用于播放的UIImageView@IBOutlet weak var catIv: UIImageView!;//喝牛奶@IBAction func drink() {//1.加载图片到数组中var imgArray = [UIImage]();for var i = 0; i<81; ++i{var imgName = i<10 ? "drink_0\(i)" : "drink_\(i)";var image:UIImage = UIImage(named: imgName)!;imgArray.insert(image, atIndex: i);}//2.将数组添加到UIImageView中self.catIv.animationImages = imgArray;//3.设置动画持续时间self.catIv.animationDuration = Double(imgArray.count) * 0.1;//4.设置动画持续次数self.catIv.animationRepeatCount = 1;//5.开启动画self.catIv.startAnimating();}//吃东西@IBAction func eat() {//1.加载图片到数组中var imgArray = [UIImage]();for var i = 0; i<40; ++i{var imgName = i<10 ? "eat_0\(i)" : "eat_\(i)";var image:UIImage = UIImage(named: imgName)!;imgArray.insert(image, atIndex: i);}//2.将数组添加到UIImageView中self.catIv.animationImages = imgArray;//3.设置动画持续时间self.catIv.animationDuration = Double(imgArray.count) * 0.1;//4.设置动画持续次数self.catIv.animationRepeatCount = 1;//5.开启动画self.catIv.startAnimating();}override func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view, typically from a nib.}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}}
原文：http://www.see-/blog/300000109/763.html
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