<form name="loginForm" ng-controller="loginCtrl" ng-submit="submitForm(loginForm.$valid)" novalidate>
  <div class="inputItem">
    <input type="number" name="phoneNum" placeholder="手机号" ng-model="userPhone" ng-pattern="/^1[3|4|5|7|8]\d{9}$/" required/>
  </div>
  <div class="inputItem">
    <input type="number" name="phoneCode" placeholder="短信验证码" ng-model="userPhoneCode" ng-focus="errorHint=ture" required/>
    <div class="button01 null" ng-if="loginForm.phoneNum.$invalid">{{paracont}}</div>
    <div ng-class="paraclass" ng-click="loginCode()" ng-if="loginForm.phoneNum.$valid">{{paracont}}</div>
    <div class="errorHint fontred" ng-if="errorHint">验证码不正确</div>
  </div>
  <button type="submit" class="button02" ng-disabled="loginForm.$invalid">登 录</button>
</form>

.inputItem{
  width:6.4rem;
  height:0.9rem;
  margin:0 auto;
  border:1px solid #ccc;
  background:#fff;
}
.inputItem:first-child{
  border-bottom:none;
}
.inputItem input{
  padding:0.1rem 0;
  margin:0.2rem;
  width:3.7rem;
}
.button01{
  width:2rem;
  height:0.7rem;
  border:1px solid #ccc;
  text-align: center;
  line-height:0.7rem;
  font-size:0.26rem;
  float:right;
  margin:0.1rem 0.2rem 0 0;
  box-sizing:border-box;
}
.button01.null{
  color:#999;
}
.fontred{
  color:#red;
}
.button02{
  display:block;
  width:6.4rem;
  height:0.9rem;
  text-align: center;
  line-height:0.9rem;
  border:1px solid #ccc;
  margin:0.8rem auto 0;
  background:#fff; 
}
.errotHint{
  line-height:0.6rem;
  font-size:0.24rem;
  padding-left:0.2rem;
  }

angular.module('loginModule',[]).controller('loginCtrl',['$scope','$interval',function($scope,$interval){
  //获取验证码
  $scope.paracont = '获取验证码';
  $scope.paraclass = 'button01';
  $scope.errorHint = false;
  $scope.paraevent = true;
  $scope.loginCode = function(){
    if($scope.paraevent){
      var second = 59;
      $scope.paracont = second + '秒后重发';
      $scope.paraclass = 'null button01';
      var timer = $interval(function(){
        if(second <=0){
          $interval.cancel(timer);
          $scope.paracont = '重发验证码';
          second = 59;
          $scope.paraclass = 'button01';
          $scope.paraevent = true;
        }else{
          second--;
          $scope.paracont = second + '秒后重发';
          $scope.paraevent = false;
        }        
      },1000);
    }
  }
  //提交
  $scope.submitForm = function(isValid){
    if(isValid){
      alert("success!");   
    }
  }  
}])