019_swift_CGSize 相关api

import UIKit//核心绘图和动画import QuartzCorelet zeroSize=CGSize.zerolet size=CGSize(width: 20, height: 20)size.widthsize.heightsize.debugDescription//平移是不会发生大小变化的 所以这个地方没有变化let transfrom:CGAffineTransform=CGAffineTransform.identitylet moveTransform=transfrom.translatedBy(x: 10, y: 10)let secondSize=size.applying(moveTransform)let rotateTransfrom=moveTransform.scaledBy(x: 2.0, y: 1.0)let thirdSize=size.applying(rotateTransfrom)thirdSize.equalTo(size)thirdSize.equalTo(CGSize(width: 40, height: 20))//字符串转换为 尺寸对象let fifthSize=NSCoder.cgSize(for: "{200,100}")