angularJs实现星星等级评分

　　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

 1 angular.module(‘XXX‘).directive(‘stars‘, stars);
 2
 3     function stars() {
 4         var directive = {
 5             restrict: ‘AE‘,
 6             template: ‘<ul class="rating" ng-mouseleave="leave()">‘ +
 7                 ‘<li ng-repeat="star in stars" ng-class="star" ng-click="click($index + 1)" ng-mouseover="over($index + 1)">‘ +
 8                 ‘<i class="glyphicon glyphicon-star stars"></i>‘ +
 9                 ‘</li>‘ +
10                 ‘</ul>‘,
11             scope: {
12                 ratingValue: ‘=‘,
13                 hoverValue: ‘=‘,
14                 max: ‘=‘,
15                 onHover: ‘=‘,
16                 onLeave: ‘=‘
17             },
18             controller: startsController,
19
20             link: function(scope, elem, attrs) {
21                 elem.css("display", "block");
22                 elem.css("text-align", "center");
23                 var updateStars = function() {
24                     scope.stars = [];
25                     for (var i = 0; i < scope.max; i++) {
26                         scope.stars.push({
27                             filled: i < scope.ratingValue
28                         });
29                     }
30                 };
31                 updateStars();
32
33                 var updateStarsHover = function() {
34                     scope.stars = [];
35                     for (var i = 0; i < scope.max; i++) {
36                         scope.stars.push({
37                             filled: i < scope.hoverValue
38                         });
39                     }
40                 };
41                 updateStarsHover();
42
43                 scope.$watch(‘ratingValue‘, function(oldVal, newVal) {
44                     if (newVal) {
45                         updateStars();
46                     }
47                 });
48                 scope.$watch(‘hoverValue‘, function(oldVal, newVal) {
49                     if (newVal) {
50                         updateStarsHover();
51                     }
52                 });
53             }
54
55
56         };
57
58         return directive;
59
60         /** @ngInject */
61         function startsController($scope) {
62             // var vm = this;
63             $scope.click = function(val) {
64                 $scope.ratingValue = val;
65             };
66             $scope.over = function(val) {
67                 $scope.hoverValue = val;
68             };
69             $scope.leave = function() {
70                 $scope.onLeave();
71             }
72
73         }
74     }

　　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。

 1 directive：
 2     scope: {
 3         readonly: ‘@‘
 4     }
 5      function startsController($scope) {
 6             // var vm = this;
 7             $scope.click = function(val) {
 8               if ($scope.readonly) {
 9                   return;
10                 }
11                 $scope.ratingValue = val;
12             };
13             $scope.over = function(val) {
14               if ($scope.readonly) {
15                   return;
16                 }
17                 $scope.hoverValue = val;
18             };
19
20       }
21
22 controller:
23     $scope.readonly = false;
24
25 html:
26     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。

　　还是多学习！