关于angularjs，$scope 交互时最近遇到几个问题

对$scope直接进行赋值

  <div ng-controller="SomeCtrl">{{ someBareValue }}<button ng-click="someAction()">Communicate </button><div ng-controller="ChildCtrl">{{ someBareValue }}<button ng-click="childAction()">Communicate </button></div></div><script>angular.module('myApp', []).controller('SomeCtrl', function($scope) {// anti-pattern, bare value$scope.someBareValue = 'hello computer';// set actions on $scope itself, this is okay$scope.someAction = function() {$scope.someBareValue = 'hello human, from parent';};}).controller('ChildCtrl', function($scope) {$scope.childAction = function() {$scope.someBareValue = 'hello human, from child';};});</script>

效果：子controller只能改变子的，父的可以两个一起变，但是子的改变过后父的就无法再另其改变

对$scope进行对象的赋值引用：

<div ng-controller="SomeCtrl">{{ someModel.someValue }}<button ng-click="someAction()">Communicate to child</button><div ng-controller="ChildCtrl">{{ someModel.someValue }}<button ng-click="childAction()">Communicate to parent</button></div></div><script>angular.module('myApp', []).controller('SomeCtrl', function($scope) {// best practice, always use a model$scope.someModel = {someValue: 'hello computer'}$scope.someAction = function() {$scope.someModel.someValue = 'hello human, from parent';};}).controller('ChildCtrl', function($scope) {$scope.childAction = function() {$scope.someModel.someValue = 'hello human, from child';};});</script>

效果：这个就是两个都变。。。

总结：在js中，对象，数组，函数是一个引用，类似浅拷贝。但是数值，字符串是值赋值。如果将模型对象的某个属性设置为字符串，它会通过引用进行共享，因此在子的改变也会改变父的。