如何通过ng-click将$ scope传递给控制器​​？

Question

所以我有以下模板：

 <div class="book-thumbs">
   <div class="book-pic" ng-repeat="img in book.images">
     <img ng-src="{{img}}" ng-click="vm.setImage(img)">
   </div>
 </div>

在控制器中我试图调用setImage（），但是我收到一个错误：$ scope未定义。

class BookController {
  constructor($scope, $stateParams, $http) {
    this.name = 'book';
    $scope.bookId = $stateParams.bookId;
    this.getBookInfo($http, $stateParams, $scope);
  }

  getBookInfo($http, $stateParams, $scope) {
    $http.get('books/' + $stateParams.bookId + '.json').success(function(data) {
      $scope.book = data;
      $scope.mainImageUrl = data.images[0];
    });
  }

  setImage(imageUrl) {
    $scope.mainImageUrl = imageUrl;
  }
}

BookController.$inject = ['$scope', '$stateParams', '$http'];
export default BookController;

我该如何解决？如果我尝试在setImage（$ scope，img）中添加$ scope作为参数，则不会发生任何变化。谢谢

Answer 1

使用构造函数中的this变量更改访问方式并在控制器中分配依赖项。

Class BookController {
  constructor($scope, $stateParams, $http) {
    this.name = 'book';
    //Add
    this.$scope = $scope;
    this.$stateParams = $stateParams;
    this.$http = $http;

    this.$scope.bookId = $stateParams.bookId;
    this.getBookInfo();
  }

  getBookInfo() {
    var that = this;
    this.$http.get('books/' + this.$stateParams.bookId + '.json').success(function(data) {
      that.$scope.book = data;
      that.$scope.mainImageUrl = data.images[0];
    });
  }

  setImage(imageUrl) {
    this.$scope.mainImageUrl = imageUrl;
  }
}

BookController.$inject = ['$scope', '$stateParams', '$http'];
export default BookController;

Answer 2

试试这个你的JS文件：

    "use strict";
   var BookController = (function () {
function BookController($scope, $stateParams, $http) {
    this.$scope = $scope;
    this.$stateParams = $stateParams;
    this.$http = $http;
    this.name = "";
    this.name = 'book';
    $scope.bookId = $stateParams.bookId;
    this.getBookInfo($http, $stateParams, $scope);
}
BookController.prototype.getBookInfo = function ($http, $stateParams,   $scope) {
    $http.get('books/' + $stateParams.bookId + '.json').success(function (data) {
        $scope.book = data;
        $scope.mainImageUrl = data.images[0];
    });
};
BookController.prototype.setImage = function (imageUrl) {
    this.$scope.mainImageUrl = imageUrl;
};
return BookController;
}());
BookController.$inject = ['$scope', '$stateParams', '$http'];
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = BookController;