在我的上一篇文章中 swift10分钟实现炫酷的导航控制器跳转动画,有一个swift logo的形状

上一篇文章的动画

    //绘制swift logo
    var bezierPath = UIBezierPath()
    bezierPath.moveToPoint(CGPointMake(96.14, 86.59))
    bezierPath.addCurveToPoint(CGPointMake(56.82, 94.83), controlPoint1: CGPointMake(81.83, 85.02), controlPoint2: CGPointMake(87.1, 95.75))
    bezierPath.addCurveToPoint(CGPointMake(20.01, 79.31), controlPoint1: CGPointMake(42.17, 94.39), controlPoint2: CGPointMake(29.06, 87.05))
    bezierPath.addCurveToPoint(CGPointMake(5.25, 62.38), controlPoint1: CGPointMake(10.35, 71.06), controlPoint2: CGPointMake(5.25, 62.38))
    bezierPath.addCurveToPoint(CGPointMake(35.2, 74.85), controlPoint1: CGPointMake(5.25, 62.38), controlPoint2: CGPointMake(17.28, 72.33))
    bezierPath.addCurveToPoint(CGPointMake(64.02, 69.54), controlPoint1: CGPointMake(53.11, 77.37), controlPoint2: CGPointMake(64.02, 69.54))
    bezierPath.addCurveToPoint(CGPointMake(37.43, 44.73), controlPoint1: CGPointMake(64.02, 69.54), controlPoint2: CGPointMake(49.91, 58.13))
    bezierPath.addCurveToPoint(CGPointMake(14.97, 16.34), controlPoint1: CGPointMake(24.96, 31.34), controlPoint2: CGPointMake(14.97, 16.34))
    bezierPath.addCurveToPoint(CGPointMake(40.56, 37.05), controlPoint1: CGPointMake(14.97, 16.34), controlPoint2: CGPointMake(31.85, 30.51))
    bezierPath.addCurveToPoint(CGPointMake(56.82, 47.75), controlPoint1: CGPointMake(45.62, 40.86), controlPoint2: CGPointMake(56.82, 47.75))
    bezierPath.addCurveToPoint(CGPointMake(43.08, 32.22), controlPoint1: CGPointMake(56.82, 47.75), controlPoint2: CGPointMake(47.12, 37.33))
    bezierPath.addCurveToPoint(CGPointMake(27.99, 11.26), controlPoint1: CGPointMake(37.51, 25.17), controlPoint2: CGPointMake(27.99, 11.26))
    bezierPath.addCurveToPoint(CGPointMake(55.05, 35.46), controlPoint1: CGPointMake(27.99, 11.26), controlPoint2: CGPointMake(45.04, 27.34))
    bezierPath.addCurveToPoint(CGPointMake(78.26, 52.03), controlPoint1: CGPointMake(61.79, 40.93), controlPoint2: CGPointMake(78.26, 52.03))
    bezierPath.addCurveToPoint(CGPointMake(80.71, 31.34), controlPoint1: CGPointMake(78.26, 52.03), controlPoint2: CGPointMake(81.63, 45.61))
    bezierPath.addCurveToPoint(CGPointMake(69.08, 3), controlPoint1: CGPointMake(79.8, 17.06), controlPoint2: CGPointMake(69.08, 3))
    bezierPath.addCurveToPoint(CGPointMake(97.29, 34.58), controlPoint1: CGPointMake(69.08, 3), controlPoint2: CGPointMake(89.12, 14.76))
    bezierPath.addCurveToPoint(CGPointMake(100.25, 67.8), controlPoint1: CGPointMake(105.45, 54.4), controlPoint2: CGPointMake(100.25, 67.8))
    bezierPath.addCurveToPoint(CGPointMake(107.29, 81.07), controlPoint1: CGPointMake(100.25, 67.8), controlPoint2: CGPointMake(104.47, 72.3))
    bezierPath.addCurveToPoint(CGPointMake(107.96, 96.25), controlPoint1: CGPointMake(110.12, 89.84), controlPoint2: CGPointMake(107.96, 96.25))
    bezierPath.addCurveToPoint(CGPointMake(96.14, 86.59), controlPoint1: CGPointMake(107.96, 96.25), controlPoint2: CGPointMake(105.27, 87.59))
    bezierPath.closePath()

看起来很可怕是不是，但是其实你并不需要写任何一行代码，这些代码都是自动生成的！听起来很酷对不对？那么接下来我就教你怎么去做，然后怎么将它在ios程序中显示出来

准备工作

首先你需要下载两个软件

• Sketch
  一个轻量级的UI矢量设计软件，可以说是当今最热门的UI设计软件，界面简洁，工具不多但是可以完成大部分的UI设计工作，可以说是苹果开发者必备的工具。
  推荐一个Sketch的学习网站:
  Sketch中文网
  还有学习UI设计的网站:
  UI中国
  下载地址:
  官方试用版下载
• Paincode2
  一个可以将矢量图形转换为OC/swift绘制代码的软件,当然它还有许多神奇的用法比如变量、动态颜色之类的，但是这个软件目前国内教程非常少，今后我可能会写关于它的文章。
  官方试用版下载
  由于只有2小时的试用时长，比较坑，所以我还是提供一下破解版的下载地址:
  破解版下载地址

然后你还需要一张swift的图标来作为临摹对象:

swift

绘制swift矢量图形

首先打开刚才下载的Sketch

欢迎界面

点击ok创建一个新的文件。

步骤1

将事先准备好的logo拖进文件,选择vector工具(其实这个工具类似于ps里的钢笔工具)

步骤2

用鼠标逐个点击各个顶点，最后连成成一个完整的形状

步骤3

点击顶点之间的部分，增加锚点，通过点击+拖拽形成曲线，然后调整锚点的两个把手，使得曲线尽量贴合图形。

步骤4

步骤4

现在Sketch的工作就已经完成了

导出图形的绘制代码

轮到我们的Paintcode干活了~

新建文件，选择导出swift代码，将刚才导出的svg文件拖进窗口中，然后代码就自动生成出来~

步骤5

我们需要的代码就是最后选中的那些代码

在ios程序中显示出swiftlogo

打开Xcode，File/New/Project...，就选择最简单的Single View Application就可以了，名字随便起。
新建之后新建一个空的swift文件（File/New/File/Swift File）,写下如下代码，创建一个类：

import UIKit
import QuartzCore

class swiftLogoLayer {

    class func logoLayer()->CAShapeLayer{
    
        let layer = CAShapeLayer()
        //添加刚才生成的代码
    

       return layer
    

     }

}

添加刚才生成的代码，替换注释内容:

    var bezierPath = UIBezierPath()
    bezierPath.moveToPoint(CGPointMake(96.14, 86.59))
    bezierPath.addCurveToPoint(CGPointMake(56.82, 94.83), controlPoint1: CGPointMake(81.83, 85.02), controlPoint2: CGPointMake(87.1, 95.75))
    bezierPath.addCurveToPoint(CGPointMake(20.01, 79.31), controlPoint1: CGPointMake(42.17, 94.39), controlPoint2: CGPointMake(29.06, 87.05))
    bezierPath.addCurveToPoint(CGPointMake(5.25, 62.38), controlPoint1: CGPointMake(10.35, 71.06), controlPoint2: CGPointMake(5.25, 62.38))
    bezierPath.addCurveToPoint(CGPointMake(35.2, 74.85), controlPoint1: CGPointMake(5.25, 62.38), controlPoint2: CGPointMake(17.28, 72.33))
    bezierPath.addCurveToPoint(CGPointMake(64.02, 69.54), controlPoint1: CGPointMake(53.11, 77.37), controlPoint2: CGPointMake(64.02, 69.54))
    bezierPath.addCurveToPoint(CGPointMake(37.43, 44.73), controlPoint1: CGPointMake(64.02, 69.54), controlPoint2: CGPointMake(49.91, 58.13))
    bezierPath.addCurveToPoint(CGPointMake(14.97, 16.34), controlPoint1: CGPointMake(24.96, 31.34), controlPoint2: CGPointMake(14.97, 16.34))
    bezierPath.addCurveToPoint(CGPointMake(40.56, 37.05), controlPoint1: CGPointMake(14.97, 16.34), controlPoint2: CGPointMake(31.85, 30.51))
    bezierPath.addCurveToPoint(CGPointMake(56.82, 47.75), controlPoint1: CGPointMake(45.62, 40.86), controlPoint2: CGPointMake(56.82, 47.75))
    bezierPath.addCurveToPoint(CGPointMake(43.08, 32.22), controlPoint1: CGPointMake(56.82, 47.75), controlPoint2: CGPointMake(47.12, 37.33))
    bezierPath.addCurveToPoint(CGPointMake(27.99, 11.26), controlPoint1: CGPointMake(37.51, 25.17), controlPoint2: CGPointMake(27.99, 11.26))
    bezierPath.addCurveToPoint(CGPointMake(55.05, 35.46), controlPoint1: CGPointMake(27.99, 11.26), controlPoint2: CGPointMake(45.04, 27.34))
    bezierPath.addCurveToPoint(CGPointMake(78.26, 52.03), controlPoint1: CGPointMake(61.79, 40.93), controlPoint2: CGPointMake(78.26, 52.03))
    bezierPath.addCurveToPoint(CGPointMake(80.71, 31.34), controlPoint1: CGPointMake(78.26, 52.03), controlPoint2: CGPointMake(81.63, 45.61))
    bezierPath.addCurveToPoint(CGPointMake(69.08, 3), controlPoint1: CGPointMake(79.8, 17.06), controlPoint2: CGPointMake(69.08, 3))
    bezierPath.addCurveToPoint(CGPointMake(97.29, 34.58), controlPoint1: CGPointMake(69.08, 3), controlPoint2: CGPointMake(89.12, 14.76))
    bezierPath.addCurveToPoint(CGPointMake(100.25, 67.8), controlPoint1: CGPointMake(105.45, 54.4), controlPoint2: CGPointMake(100.25, 67.8))
    bezierPath.addCurveToPoint(CGPointMake(107.29, 81.07), controlPoint1: CGPointMake(100.25, 67.8), controlPoint2: CGPointMake(104.47, 72.3))
    bezierPath.addCurveToPoint(CGPointMake(107.96, 96.25), controlPoint1: CGPointMake(110.12, 89.84), controlPoint2: CGPointMake(107.96, 96.25))
    bezierPath.addCurveToPoint(CGPointMake(96.14, 86.59), controlPoint1: CGPointMake(107.96, 96.25), controlPoint2: CGPointMake(105.27, 87.59))
    bezierPath.closePath()

将图层的形状变成代码所绘制的形状

    layer.path = bezierPath.CGPath

确定图层的大小,下面这个函数会把我们的形状用一个矩形起来，这个矩形就是图层的大小

    layer.bounds = CGPathGetBoundingBox(layer.path)

打开ViewController.swift
添加一个图层常量，调用刚才创建的类中的方法

let logo = swiftLogoLayer.logoLayer()

在viewDidLoad()方法中添加以下代码:

将背景设置为灰色

    self.view.backgroundColor = UIColor.grayColor()

将logo图层居中

    logo.position = CGPoint(x: view.layer.bounds.size.width/2, y: view.layer.bounds.size.height/2)

修改logo填充色为白色

    logo.fillColor = UIColor.whiteColor().CGColor

将logo图层添加到主视图的图层中

    self.view.layer.addSublayer(logo)

如果没有任何错误，点击运行
应该会出现如下图所示效果:

运行结果

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