swift语言IOS8开发战记15 Animation Delay

标签：ios8   swift   动画   animation   delay   

       前几话我们实现了Review按钮的功能，今天来实现Share按钮的功能，由于两个功能的相似性，所以新建一个控制器，ShareViewController类，把ReviewViewController类的代码复制过去进行修改，share中不需要transforView和label，删掉，然后把按钮改成四个放到基view中，代码如下：

let buttonWidth:CGFloat = 60
        let buttonY:CGFloat = 200 //三个按钮相同的规格
        let faceBtn = UIButton(frame: CGRectMake(100, buttonY, buttonWidth, buttonWidth))
        faceBtn.setBackgroundImage(UIImage(named: "facebook"), forState: .Normal)
        self.view.addSubview(faceBtn)
        
        let twitterBtn = UIButton(frame: CGRectMake(160, buttonY, buttonWidth, buttonWidth))
        twitterBtn.setBackgroundImage(UIImage(named: "twitter"), forState: .Normal)
        self.view.addSubview(twitterBtn)
        
        let messageBtn = UIButton(frame: CGRectMake(100, 260, buttonWidth, buttonWidth))
        messageBtn.setBackgroundImage(UIImage(named: "message"), forState: .Normal)
        self.view.addSubview(messageBtn)
        
        let emailBtn = UIButton(frame: CGRectMake(160, 260, buttonWidth, buttonWidth))
        emailBtn.setBackgroundImage(UIImage(named: "email"), forState: .Normal)
        self.view.addSubview(emailBtn)

    func clickShare(sender: UIButton){
        let share = ShareViewController()
        self.presentViewController(share, animated: true, completion: nil )//临时展示一个控制器
    }

然后给图片设置一个背景色，颜色的话用mac自带的取色器就可以获得：

现在我们来实现这几个按钮的动画效果，让他们从不同的敌方飞进屏幕然后组合成上图的样子，首先让facebook的图标从下面飞入，让email的图标从上面飞入。

在按钮的代码后面继续增加如下代码：

let upTranslate = CGAffineTransformMakeTranslation(0, -500)
        let downTranslate = CGAffineTransformMakeTranslation(0, 500)
        faceBtn.transform = downTranslate
        emailBtn.transform = upTranslate

    var faceBtn: UIButton!
    var twitterBtn: UIButton!
    var emailBtn: UIButton!
    var messageBtn: UIButton!

override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        UIView.animateWithDuration(1.0, delay: 0.0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0.7, options: nil, animations: { let translate = CGAffineTransformMakeTranslation(0, 0)
            self.faceBtn.transform = translate
            self.emailBtn.transform = translate
            }, completion: nil)
        
    }

然后如法炮制实现另外两个按钮，延迟设为0.1秒，最后的效果如图，按钮飞入：

swift语言IOS8开发战记15 Animation Delay

标签：ios8   swift   动画   animation   delay   

原文地址：http://blog.csdn.net/cg1991130/article/details/42673271