angular.module('controllers')
 .controller('LoginCtrl', function ($scope, $location,$ionicLoading,$rootScope,$interval,$timeout) {
 $scope.timer = false;
 $scope.timeout = 60000;
 $scope.timerCount = $scope.timeout / 1000;
 $scope.text = "获取验证码";
 $scope.onClick = function(){
  $scope.showTimer = true;
  $scope.timer = true;
  $scope.text = "秒后重新获取";
  var counter = $interval(function(){
  $scope.timerCount = $scope.timerCount - 1;
  }, 1000);
  $timeout(function(){
  $scope.text = "获取验证码";
  $scope.timer = false;
  $interval.cancel(counter);
  $scope.showTimer = false;
  $scope.timerCount = $scope.timeout / 1000;
  }, $scope.timeout);
 };
 });

<button class="yz-btn" ng-click="onClick()" ng-disabled="timer"><span ng-if="showTimer">{{timerCount}}</span>{{text}}</button>