快速动画

Question

所以我的任务是快速学习swift来制作一个非常基本的应用程序。 我需要添加一些＆＃34; eye candy＆＃34;所以事情需要一些动画，任何人都可以帮助学习时间限制，并指出我的方向。

我想在插入图片时添加动画制作下面的代码，我只需要看看IOS是如何期望我在swift中添加它的。

import UIKit
class TESTView: UIView {

    override func drawRect(rect: CGRect) {
        /*
         * Set the background image for the App
         */

        //Get the graphics context
        let context = UIGraphicsGetCurrentContext()
        //Get the size of the screen
        let entireScreen = UIScreen.mainScreen().bounds
        //Set the background image
        let backgroundImage = UIImage(named: "brush-strokes.jpg")
        //Fill screen with image
        backgroundImage?.drawInRect(entireScreen)

        /*
         * Set the icons for the menu
         */

        //Amount of menu items
        let menuIcons = 6
        //Get the icons in use
        let iconOne = UIImage(named: "UnRarX.png")
        //smaller size
        let newSize = CGSize(width: 50, height: 50)

        //Start image editing context to reduce size
        UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
        //Scale icon
        iconOne?.drawInRect(CGRectMake(0, 0, newSize.width, newSize.height))
        //Get scaled icon
        let imageResized = UIGraphicsGetImageFromCurrentImageContext()
        //End image editing context
        UIGraphicsEndImageContext()

       /*
        * Lets try place the menu items in a circle
        */

        //TODO:Use 10% off all the edges of the screen size
        let radius = 100.0
        // add .0 to set as double for later
        let step = (2 * M_PI) / Double(menuIcons)
        // Divide by the number of icons
        var angle = 0.0 // Starting angle
        //Set 0 point for later
        var iconOnePos = CGPoint.zeroPoint
        //Loop icons No.
        for var i = 1; i <= menuIcons; ++i{
            //Calc the current X & Y vals using some maths
            var x = (entireScreen.width - 25) / 2 + CGFloat(radius * cos(angle)) // take off 25 for half the icon size
            var y = entireScreen.height / 2 + CGFloat(radius * sin(angle))
            //Create new point for the icon
            iconOnePos = CGPointMake(x, y)
            //Draw the image we resized
            imageResized?.drawAtPoint(iconOnePos)
            //Move the angle for the next calculation
            angle += step;
        }
    }


}