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angular.js - angular 自定义指令 repeat bind 怎么不能同时作用在同一元素上

如题，自己写了两个指令，想作用在同意元素下，先进行repeat，后进行bind，但目前，仅第一个执行bind

<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <title>angular</title>
    <script src="http://cdn.bootcss.com/angular.js/1.2.10/angular.min.js"></script>
</head>
<body ng-app="app">
    <p ng-controller="test">
            <input type="text" ng-model="msg">
            <p lxc-bind="msg" lxc-reapeat="3">123123</p>
            <!-- <p lxc-reapeat="3">lxc</p> -->
    </p>
    <script>
        angular.module('app',[])
        .controller('test',function($scope){
                $scope.msg = 'test';
        })
        .directive('lxcBind',function(){
            // Runs during compile
            return {
                restrict: 'A', // E = Element, A = Attribute, C = Class, M = Comment
                link: function($scope, iElm, iAttrs, controller) {
                        $scope.$watch(iAttrs.lxcBind,function(newValue){
                                iElm.text(newValue);
                        })
                }
            };
        })
        .directive('lxcReapeat',function(){
            return {
                restrict:'A',
                priority: 1000,
                link:function($scope,$elm,$attr){
                    var repeatNum = $attr.lxcReapeat;
                    for (var i=repeatNum-2;i>= 0;i--){
                         var dom = $elm.clone();
                         $elm.after(dom);
                    }
                }
            }
        })
    </script>
</body>
</html>
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  • 迷茫

    迷茫2017-05-15 17:10:02

    Pertama, kaedah clone hanya mengklon nod, dan peristiwa terikat tidak akan diklon.
    Perkara kedua, apabila menambahkan nod pada dokumen secara dinamik, arahan sudut tidak akan berkuat kuasa dan memerlukan kompilasi dinamik. 

    angular.module('app',[])
// 注入 $compile 服务，用来动态编译
.directive('lxcReapeat',function($compile){
    return {
        restrict:'A',
        priority: 1000,
        link:function($scope,$elm,$attr){
            var repeatNum = $attr.lxcReapeat;
            for (var i=repeatNum-2;i>= 0;i--){
                 var dom = $elm.clone();
                 // 删除 lxc-reapeat 属性，否则动态编译会造成死循环。理解这点很重要
                 dom.removeAttr('lxc-reapeat');
                 // 动态编译并连接到scope
                 var ele = $compile(dom)($scope);
                 $elm.after(ele);
            }
        }
    }
})

    Rendering:

    dan ng-repeat

    Pelaksanaan di atas tidak mempunyai masalah fungsi, tetapi pembentukannya tidak begitu seragam. Jadi, saya buat sedikit pengubahsuaian

    <!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <title>angular</title>
    <script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script> 
</head>
<body ng-app="app">
    <p ng-controller="test">
        <p ng-repeat="i in [1,2,3]">{{i}}</p>
        <input type="text" ng-model="msg">
        <p lxc-bind="msg" lxc-reapeat="3">123123</p>
    </p>
    <script>
        angular.module('app',[])
        .controller('test',function($scope){
            $scope.msg = 'test';
        })
        .directive('lxcBind',function(){
            return {
                restrict: 'A',
                link: function($scope, iElm, iAttrs, controller) {
                    console.log(2)
                    $scope.$watch(iAttrs.lxcBind,function(newValue){
                        iElm.text(newValue);
                    })
                }
            };
        })
        .directive('lxcReapeat',function($compile){
            return {
                restrict:'A',
                priority: 1000,
                link: function(scope, iElement, iAttrs, controller){
                    
                    var repeatNum = iAttrs.lxcReapeat,
                        $parent = iElement.parent(),
                        html = '';

                    iElement.remove();

                    for (var i = 0; i < repeatNum; i++){
                        if( i == 0 ){
                            html = '<!-- lxcReapeat: '+repeatNum+' -->';
                        }else{
                            html = '<!-- end lxcReapeat: '+repeatNum+' -->';
                        }
                        var dom = iElement.clone()[0];
                        dom.removeAttribute('lxc-reapeat');
                        dom = $compile(html+dom.outerHTML)(scope);
                        $parent.append(dom);
                        dom.attr('lxc-reapeat', repeatNum).addClass('lxc-bind');
                    }

                    $parent.append(html);
                    
                }
            }
        })
    </script>
</body>
</html>

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