angular.js - 关于指令link 中的创建变量问题

Question

angular.module("myDirective",[])
    .directive("tabOne",function (){
        return{
            restrict:"E",
            replace:true,
            scope:{
                data:"=myData",
            },
            transclude:true,
            template:' <p ng-hide="show">'+
            '<p ng-repeat="x in data">'+
                '{{x}}'+
    '</p>'+
    '</p>',
            link:function(scope,elem,attr){
                scope.show=true;
               elem.find("p").on("click",function(){
                    scope.show=!scope.show;
                    console.log(scope.show);
                });
            }
        }
    })

如问题所示我现在，在link创建一个变量show，这个show用在模板表示是否hide可是 scope.show一直显示true？
不知道问题出现在哪里求赐教给位！谢谢
但是console.log(scope.show）是同步改变的啊

Answer 1

Changed:

elem.find("p").on("click",function(){
    scope.show=!scope.show;
    scope.$apply();
});

Added:

See the documentation

The document says that if it is controller里的同步操作，或者是通过$http、$timeout、$interval的异步操作，scope.$apply()是自动执行的(Angular帮你做了)。但你这里显然不符合条件，你使用了DOM API，所以需要手动显示的调用一下scope.$apply()

Document address: scope

Answer 2

Thank you for the advice. After reading the documentation, many of my own methods will trigger apply, dom, and the exhaustive settimeout operation will not trigger apply