angular提供了一个可以复制对象的api——copy(source,destination),它会对source对象执行深拷贝。
使用时需要注意下面几点:- 如果只有一个参数(没有指定拷贝的对象),则返回一个拷贝对象
- 如果指定了destination,则会深拷贝对象复制给destination
- 如果source是null或者undefined,那么会直接返回source
- 如果source就是desitination,那么会报错。
下面看看使用样例:<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script></head><body ng-app="copyExample"><div ng-controller="ExampleController"><form novalidate class="simple-form">Name: <input type="text" ng-model="user.name" /><br />E-mail: <input type="email" ng-model="user.email" /><br />Gender: <input type="radio" ng-model="user.gender" value="male" />male<input type="radio" ng-model="user.gender" value="female" />female<br /><button ng-click="reset()">RESET</button><button ng-click="update(user)">SAVE</button></form><pre>form = {{user | json}}</pre><pre>master = {{master | json}}</pre></div><script>angular.module("copyExample", []).controller("ExampleController", ["$scope", function($scope) {$scope.master= {};var test1;console.log(angular.copy(test1));//undefinedvar test3=null;console.log(angular.copy(test2));//undefinedvar test2 = "a";// console.log(angular.copy(test2,test2));//error!!$scope.update = function(user) {// Example with 1 argument$scope.master= angular.copy(user);};$scope.reset = function() {// Example with 2 argumentsangular.copy($scope.master, $scope.user);console.log($scope.master);console.log($scope.user);};$scope.reset();}]);</script></body></html>

以上就是对AngularJS API之copy深拷贝的资料整理,后续继续补充相关资料,谢谢大家对本站的支持!