AngularJS实现星星等级评分功能

时间:2020-05-15 大禹不治水人气:0

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。

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