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AngularJS实现星星等级评分功能

2019-11-20 08:53:41
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星期六加班,教育后台也要有星级评分等级的需求,醉了……基本知道些怎么做,网上也随便找了找,没什么合意的,毕竟需求不同,也不能完全一样不是。学习之,改之()

Directive 

angular.module('XXX').directive('stars', stars);  function stars() {    var directive = {      restrict: 'AE',      template: '<ul class="rating" ng-mouseleave="leave()">' +        '<li ng-repeat="star in stars" ng-class="star" ng-click="click($index + 1)" ng-mouseover="over($index + 1)">' +        '<i class="glyphicon glyphicon-star stars"></i>' +        '</li>' +        '</ul>',      scope: {        ratingValue: '=',        hoverValue: '=',        max: '=',        onHover: '=',        onLeave: '='      },      controller: startsController,      link: function(scope, elem, attrs) {        elem.css("display", "block");        elem.css("text-align", "center");        var updateStars = function() {          scope.stars = [];          for (var i = 0; i < scope.max; i++) {            scope.stars.push({              filled: i < scope.ratingValue            });          }        };        updateStars();        var updateStarsHover = function() {          scope.stars = [];          for (var i = 0; i < scope.max; i++) {            scope.stars.push({              filled: i < scope.hoverValue            });          }        };        updateStarsHover();        scope.$watch('ratingValue', function(oldVal, newVal) {          if (newVal) {            updateStars();          }        });        scope.$watch('hoverValue', function(oldVal, newVal) {          if (newVal) {            updateStarsHover();          }        });      }    };    return directive;    /** @ngInject */    function startsController($scope) {      // var vm = this;      $scope.click = function(val) {        $scope.ratingValue = val;      };      $scope.over = function(val) {        $scope.hoverValue = val;      };      $scope.leave = function() {        $scope.onLeave();      }    }  }

CSS 

.rating {  color: #a9a9a9;  margin: 0;  padding: 0;   text-align: center;}ul.rating {  display: inline-block;}.rating li {  list-style-type: none;  display: inline-block;  padding: 1px;  text-align: center;  font-weight: bold;  cursor: pointer;} .rating .filled {  color: #f00;}.rating .stars{  font-size: 20px;  margin-right: 5px;}

Controller 

    //星星等级评分    $scope.max = 6;    $scope.ratingVal = 6;    $scope.hoverVal = 6;//我这需求是默认六个星全满(淡腾,反正也招不出神龙.因为还差一个.)一般的话,ratingVal和hoverVal都写0就可以了。    $scope.onHover = function(val) {      $scope.hoverVal = val;    };    $scope.onLeave = function() {      $scope.hoverVal = $scope.ratingVal;    }    $scope.onChange = function(val) {      $scope.ratingVal = val;    }

HTML

<stars rating-value="ratingVal" hover-value="hoverVal" max="max" on-hover="onHover" on-leave="onLeave"></stars>ratingVal:{{ratingVal}};<br/>hoverVal:{{hoverVal}}

说几句, 星星那东西,可以直接输入法敲出来,也可以用unicode搞出来,字体文件什么的都行,你要硬用图片的话……把ngClass换成ngSrc也可以试试,代码改改也行,精灵图改改background-position也凑合过,() 想了一下,比较累,祝你成功。

如果是那种商城网站只是要看评价等级的话,复用代码也可以,加个readonly属性。 

directive:  scope: {    readonly: '@'  }   function startsController($scope) {      // var vm = this;      $scope.click = function(val) {       if ($scope.readonly) {         return;        }        $scope.ratingValue = val;      };      $scope.over = function(val) {       if ($scope.readonly) {         return;        }        $scope.hoverValue = val;      };   }controller:  $scope.readonly = false;html:  readonly={{readonly}}.

写到这,突然意识到今后一定会改需求,加功能(已然习惯)。我还是默默地加上readonly吧……

指令这玩意,深了很绕,我也弄不熟,每次写还得翻翻以前写的代码,毕竟渣渣。每次不要复用的代码,我都懒得用指令,毕竟菜鸟。

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持武林网。

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