问题描述
如何用ng-switchh实现根据数组长度不同，显示不同的内容，假如用arr.length作为判断条件的话需要写很多情况，所以考虑用true作为判断条件，但是不知道ng-switch-when该怎么写，当然用ng-if也可以实现，只是对ng-switch的写法有疑问，谢谢。代码如下：
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <title>title</title> <script src='https://www.6hehe.com/wenda/angular.js'></script> <style> </style></head><body ng-app='App'><p ng-controller='Ctrl'> <p ng-switch='arr.length'><span ng-switch-when='1'>1</span><span ng-switch-when='2'>2</span><span ng-switch-when='3'>3</span> </p> <p><span ng-if='arr.length<2'>1---</span><span ng-if='arr.length>=2'>2---</span> </p> <p ng-switch=true><span ng-switch-when='(arr.length==0)'> 1---true </span><span ng-switch-when='(arr.length==0)'> 2---true </span> </p></p><script> var App = angular.module('App', []); App.controller('Ctrl', ['$scope', function ($scope) {$scope.arr = [1, 2,3]; }]);</script></body></html>
问题解答
回答1：<ul ng-switch='arr'> <li ng-switch-when='1'>1111111</li> <li ng-switch-when='2'>222222222</li> <li ng-switch-when='3'>333333333</li> <li ng-switch-default=' arr>3'>4444444444444444444444444444</li></ul>$scope.arr= arr.length;
