</pre>四 Swift学习之集合类型 (Collection Types)---------------借鉴老码团队Swift 语言提供经典的数组和字典两种集合类型来存储集合数据。数组用来按顺序存储相同类型的数据。字典虽然无序存储相同类型数据值但是需要由独有的标识符引用和寻址(就是键值对)。Swift 语言里的数组和字典中存储的数据值类型必须明确。 这意味着我们不能把不正确的数据类型插入其中。
//*********************************************************************************************** //1.Nested Types(类型嵌套) //_____________________________________________________________________
常量和变量 Varibales var myInt = 1 //inexplicit type
var myExplicitInt : Int = 1 // explicit type
var x = 1, y = 2, z = 3 //declare multiple integers
myExplicitInt = 3 // set to another integer value Const
文档地址: https://developer.apple.com/library/prerelease/content/documentation/Swift/Conceptual/Swift_Programming_Language/CollectionTypes.html#//apple_ref/doc/uid/TP40014097-CH8-ID105 1、Arrays are ordere
// You might create a component designed to apply context and render its children.
class SomeContextProvider extends React.Component {
getChildContext() {
return {some: "context"}
}
render
/** * Create by bamboo on 2018-04-13 * */ import React,{ Component} from 'react'; import { View, Text, Button,} from 'react-native'; import PropTypes from 'prop-types'; //类型检验组件 //主页 export default cl