矢量图.gpu直接使用.占用内存小 What Shape Layers Are Shape layers are layers capable of defining shapes as vectors. Because they’re defined as vectors, they are resolution-independent layers. At render time, Core Animation will create a bitmap that is the appropr…
源地址:https://developer.mozilla.org/zh-CN/docs/JavaScript/Reference/Global_Objects/Object/create#.E4.BD.BF.E7.94.A8Object.create.E5.AE.9E.E7.8E.B0.E5.8E.9F.E5.9E.8B.E7.BB.A7.E6.89.BF 概述 创建一个拥有指定原型和若干个指定属性的对象. Method of Object Implemented in JavaScript…