angular 倒计时

$scope.countdown = 10;
var myTime = setInterval(function() {
$scope.countdown--;
$scope.$digest(); // 通知视图模型的变化
}, 1000);

// 倒计时10-0秒，但算上0的话就是11s
setTimeout(function() {
　　// Do SomeThing

clearInterval(myTime);
$scope.countdown.$destroy();
}, 11000);

$scope.countdown="获取验证码";
$scope.countdownEvent=function(){
$scope.countdown=10;
var myTime=setInterval(function(){
if($scope.countdown>1){
$scope.countdown--;
}else{
$scope.countdown="获取验证码";
clearInterval(myTime);
}
},1000);
}

var myinterval;
$scope.countdown = 10;
$scope.aa=function(){
$scope.countdown = 10;
mytimeout=$interval(function(){
if($scope.countdown>1){
$scope.countdown--;
}else{
$interval.cancel(mytimeout);
$scope.countdown = 10;
}
},1000);
}