ng-repeat指令的使用方式可以参考如下代码：
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>ng-repeat</title> <script src="https://www.jb51.net/jquery-1.11.1.js"></script> <script src="https://www.jb51.net/angular-1.2.25.js"></script> <script> function wholeController($scope,$rootScope,$injector) { $scope.buttons = ["button1","button2","button3"]; $scope.btnFunc = function(value){ alert(value); }; } </script> </head> <body ng-app> <div ng-controller="wholeController"> <div> <input type="button" ng-repeat="button in buttons" value="{{button}}" ng-click="btnFunc(button);"/> </div> <input type="button" value="test" ng-click="testFunc();"> </div> </body> </html>
这里需要注意：ng-click中访问button不需要使用{{button}}这种语法；而其他非AngularJS环境下，必须通过{{button}}这种方式取值。ng-repeat指令中$index代表遍历的数组的索引，从0开始。
我们知道ng-controller指令会创建一个新的作用域scope，测试代码如下：
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>ng-repeat</title> <script src="https://www.jb51.net/jquery-1.11.1.js"></script> <script src="https://www.jb51.net/angular-1.2.25.js"></script> <script> //$scope是ng-controller指令新建的作用域 function wholeController($scope,$rootScope,$injector) { alert($scope.$parent === $rootScope);//输出true } </script> </head> <body ng-app> <div ng-controller="wholeController"> </div> </body> </html>
我们可以使用angular.element(domElement).scope()方法来获得某一个DOM元素相关联的作用域。
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>ng-repeat</title> <script src="https://www.jb51.net/jquery-1.11.1.js"></script> <script src="https://www.jb51.net/angular-1.2.25.js"></script> <script> function wholeController($scope,$rootScope,$injector) { $scope.buttons = ["button1","button2","button3"]; $scope.testFunc = function(){ //拿到dom元素上关联的作用域 var scope0 = angular.element($("#btn0")[0]).scope(); var scope1 = angular.element($("#btn1")[0]).scope(); alert(scope0 == scope1);//输出false alert(scope0.$parent === $scope);//true alert(scope1.$parent === $scope);//true }; } </script> </head> <body ng-app> <div ng-controller="wholeController"> <div> <input type="button" ng-repeat="button in buttons" value="{{button}}" /> </div> <input type="button" value="test" ng-click="testFunc();"> </div> </body> </html>
可以看到ng-repeat指令会新建作用域，而且是为循环中的每个dom元素新建一个作用域。通过F12调试，可以看到scope0和scope1的内容如下：
可以看到scope0和scope1中都有一个buttons属性，这个属性就是从父作用域下继承得到的，很类似于JavaScript的原型链。
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>ng-repeat</title> <script src="https://www.jb51.net/jquery-1.11.1.js"></script> <script src="https://www.jb51.net/angular-1.2.25.js"></script> <script> function wholeController($scope,$rootScope,$injector) { $scope.buttons = ["button1","button2","button3"]; $scope.method1 = function(){ var scope0 = angular.element($("#btn0")[0]).scope(); scope0.buttons = ["a1","b1","c1"]; }; $scope.method2 = function(){ var scope0 = angular.element($("#btn0")[0]).scope(); scope0.$parent.buttons = ["a2","b2","c2"]; }; $scope.method3 = function(){ var scope0 = angular.element($("#btn0")[0]).scope(); scope0.buttons[0] = "a3"; scope0.buttons[1] = "b3"; scope0.buttons[2] = "c3"; }; } </script> </head> <body ng-app> <div ng-controller="wholeController"> <div> <input type="button" ng-repeat="button in buttons" value="{{button}}" /> </div> <input type="button" value="method1" ng-click="method1();"> <input type="button" value="method2" ng-click="method2();"> <input type="button" value="method3" ng-click="method3();"> </div> </body> </html>
当点击method1、method2、method3的时候，我们希望将按钮button1、button2、button3替换掉。运行上面的代码可以发现：method2和method3都能成功达到目的，但是method1不能达到目的。这其实很类似C语言中传值，还是传引用的问题。