如何访问对象键angularjs中的动态键值

var obj = {
  key1: 'value1',
  key2: 'value2'
};

var dynamicKey = 'key1';
var value = obj[dynamicKey]; // 访问动态键值

console.log(value); // 输出：value1

$scope.obj = {
  key1: 'value1',
  key2: 'value2'
};

var dynamicKey = 'key1';
var value = $scope.$eval('obj.' + dynamicKey); // 访问动态键值

console.log(value); // 输出：value1