angular的Directive传值问题?

Question

angular的Directive传值问题

Answer 1

单纯的从你代码来看的话，只要在组件加载的时候AddMusicCtrl.stores有值，directive是可以获取到的。所以你console出undefined的原因可能是因为在directive加载的时候，AddMusicCtrl.stores并没有值。你可以尝试着这么写一下：<stores&nbsp;list="AddMusicCtrl.stores"&nbsp;data-ng-if="AddMusicCtrl.stores"></stores>或者在你的controller里面给AddMusicCtrl.stores一个默认值。

Answer 2

这里并非是“传不进去值”,而是在传值的时候AddMusicCtrl.stores这个变量还没有值。在controller中为AddMusicCtrl.stores设置一个默认值就可以解决这个问题，也可以在指令中监听一下list。当list变化时（也就是从没值变到有值得时候 ），就可以打印出来了&nbsp;&nbsp;&nbsp;link:&nbsp;function&nbsp;(scope,elem,attr)&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;scope.$watch('list',function(newVlaue){ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log(scope.list) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;}在指令的编译过程中，controller指令声明了变量而未给它赋值，编译stores指令的时候，所绑定的变量还没有赋值，因而打印出 undefined。

Answer 3

angular.module('index_area').directive('stores', function () {&nbsp; &nbsp; return {&nbsp; &nbsp; &nbsp; &nbsp; restrict: 'E',&nbsp; &nbsp; &nbsp; &nbsp; replace: true,&nbsp; &nbsp; &nbsp; &nbsp; scope: true,&nbsp; &nbsp; &nbsp; &nbsp; templateUrl: 'Template/StoresSelect.html',&nbsp; &nbsp; &nbsp; &nbsp; link: function (scope,elem,attr) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //var value= scope.AddMusicCtrl.stores&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; console.log(scope.AddMusicCtrl.stores)&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }})<div class="form-lyout">&nbsp; &nbsp; <div class="form-title">参与区域</div>&nbsp; &nbsp; <div class="form-layout">&nbsp; &nbsp; &nbsp; &nbsp; <div class="radio">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <label>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<input type="radio" name="exclusives" value="true"&nbsp; ng-model='AddMusicCtrl.music.exclusive' checked>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 全部门店&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </label>&nbsp; &nbsp; &nbsp; &nbsp; </div>&nbsp; &nbsp; &nbsp; &nbsp; <div class="radio">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <label>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<input type="radio" name="exclusives" value="true"&nbsp; ng-model='AddMusicCtrl.music.exclusive' checked>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 部分门店&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </label>&nbsp; &nbsp; &nbsp; &nbsp; </div>&nbsp; &nbsp; </div></div><div class="form-lyout">&nbsp; &nbsp; <div class="form-title">门店筛选</div>&nbsp; &nbsp; <div class="form-layout">&nbsp; &nbsp; &nbsp; &nbsp; {{AddMusicCtrl.stores}}&nbsp; &nbsp; &nbsp; &nbsp; <store></stores>&nbsp; &nbsp; </div></div>