<script src="https://cdn.staticfile.org/angular.js/1.6.6/angular.min.js"></script>

​

<div ng-app="myApp" ng-controller="myCtrl">

<button ng-click="sum()">点我！</button>

<p>{{ count }}</p>

</div>

var app = angular.module('myApp', []);

app.controller('myCtrl', function($scope) {

    $scope.count = 0;

    $scope.sum = function(){

        $scope.count =this.count+1;

    }

});