AngularJs ?延时器、计时器

apptest.controller("main",function($scope,$timeout){ ???$scope.pink="pink"; ???$scope.box="第二个盒子"; ???$timeout(function(){ ?????$scope.pink="第一个盒子内容，延迟两秒后改变了"; ???},2000);setTimeout(function(){ ???$scope.pink="第一个盒子内容，延迟3秒后改变了"; ????$scope.$apply();//手动更新视图},3000);}

 //计时器var timer= $interval(function(){ ????console.log(1); },1000);//清除计时器 $interval.cancel(timer);

<button ng-click="clickb()" ng-disabled="flag">{{num}}</button>$scope.flag=false;$scope.clickb=(function(){ ???$scope.flag=true; ???$scope.num=5; ???var int = $interval(function(){ ???????$scope.num--; ???????if($scope.num==-1){ ???????????$scope.flag=false; ???????????$scope.num="点击倒计时5秒"; ???????????$interval.cancel(int); ???????} ???},1000);});