var app = angular.module('myApp', []);
app.controller('myController', function($scope) {
  // 控制器逻辑
});

<div ng-app="myApp" ng-controller="myController">
  <!-- 页面内容 -->
</div>

app.controller('myController', function($scope) {
  $scope.myFunction = function() {
    // 函数逻辑
  };
});

<button ng-click="myFunction()">点击我</button>