javascript - angularjs指令错误:[nonassign]

Question

我尝试使用 angular1.x 指令，并收到此错误:

angular.js:14700 Error: [$compile:nonassign] Expression 'undefined' in attribute 'showPageCount' used with directive 'ngPage' is non-assignable!

看来我没有在指令中签署该属性。我怎样才能让它发挥作用？

index.html

ngPageTemplate.html

ng-page.js:

angular.module('ngPage', [])
    .directive('ngPage', function () {
      return {
        restrict: 'E',
        transclude: true,
        replace: true,
        scope: {
          pageNo: '=',
          pageSize: '=',
          totalCount: '=',
          pageChange: "&",
          showPageCount: '='
        },
        templateUrl: './ngPageTemplate.html',
        link: function (scope, element, attrs) {
          scope.showPageCount = scope.showPageCount ? scope.showPageCount : 5;
          scope.pageCount = Math.ceil(scope.totalCount / scope.pageSize);
          scope.hasPre = scope.pageNo > 1;
          scope.preNo = scope.hasPre ? scope.pageNo - 1 : scope.pageNo;
          scope.hasNext = scope.pageNo < scope.pageCount;
          scope.nextNo = scope.hasNext ? scope.pageNo + 1 : scope.pageNo;

          scope.goPage = function (pageNo) {
            if (scope.pageNo !== pageNo) {
              scope.pageNo = pageNo;
              scope.pageChange();
            }
          };
          scope.getPageList = function () {
            var list = [];
            if (scope.pageCount <= scope.showPageCount) {
              for (var i = 1; i < scope.pageCount + 1; i++) {
                list.push(i);
              }
            } else {
              var startNo = scope.pageNo - scope.showPageCount / 2;
              var endNo = scope.pageNo + scope.showPageCount / 2;
              if (startNo < 1) {
                //前几页
                startNo = 1;
                for (var i = 0; i < scope.showPageCount; i++) {
                  list.push(startNo++);
                }
              } else if (endNo > scope.pageCount) {
                //后几页
                endNo = angular.copy(scope.pageCount);
                for (var i = scope.showPageCount; i >= 0; i--) {
                  list.unshift(endNo--);
                }
              } else {
                //中间页
                startNo = Math.ceil(startNo);
                for (var i = 0; i < scope.showPageCount; i++) {
                  list.push(startNo++);
                }
              }
            }
            return list;
          };
          scope.pageList = scope.getPageList();
        }
      };

    });

Answer 1

您将无法在指令 link 函数内的指令范围内使用 showPageCount 参数。如果您想在链接函数中使用它，则必须将 ng-model-options 中的值传递为

<input type="text" ng-model="yourModel" 
ng-model-options='{ debounce: 600, showpagecount: scopecountvalue }' 
ng-page/>

并使用内部指令链接函数作为。

.directive('ngPage', function () {    
    return {
        require: 'ngModel',
        restrict: 'AE',
        link: function (scope, element, attr, ctrl) {
            function inputValue(val) {  
                var pageCount = ctrl.$options.showpagecount;
            }
            ctrl.$parsers.push(inputValue);
        }
    };
})

现在可以在链接函数内访问该值。希望这会对您有所帮助。