我对Angular还是很陌生,并尝试实现此Angular Buttons-复选框绑定:JSFIDDLE,但是却出现错误“无法读取未定义的属性'$ viewValue'” 在浏览器控制台上调试时, ctrl 显示为未定义。我在StackOverflow上尝试了许多答案,但是经过数小时的尝试仍然无法解决。
HTML
<div class="btn-group" data-toggle="buttons-checkbox">
<button type="button" ng-model="myModel.optionA"
ng-show="myModel.optionA" class="btn">A</button>
<button type="button" ng-model="myModel.optionB"
ng-show="myModel.optionB" class="btn">B</button>
</div>
JS
app.controller("productCatalogController", ["$scope", "$http", "$compile", "$timeout",
function($scope, $http, $compile, $timeout) { ... }
app.directive('button', function() {
return {
restrict: 'E',
scope: {
'ngModel': '='
},
link: function(scope, element, attr, ctrl) {
if (!element.parent('[data-toggle="buttons-checkbox"].btn-group').length) {
return;
}
scope.$watch('ngModel', function(newValue, oldValue) {
element.toggleClass('active', ctrl.$viewValue);
});
element.bind('click', function(e) {
scope.$apply(function(scope) {
ctrl.$setViewValue(!ctrl.$viewValue);
});
e.stopPropagation();
});
}
}
});
答案 0 :(得分:1)
不要简单地用ngModel
绑定到scope
。像这样使用require
:
'require': 'ngModel'