为什么 $scope.logo 在控制器中未定义？

Question

这是我的 HTML 表单

<form ng-submit='create()'>
    ..
    .
    .
    <input type='file' ng-model='logo' accept="image/*">
</form>

这是我的控制器：

$scope.create = function () {
        $scope.Ent = {}
        $scope.Ent.logo = $scope.logo;

Answer 1

ng-model 在输入类型 'file.使用自定义指令绑定它

.directive("fileread", [function () {
    return {
        scope: {
            fileread: "="
        },
        link: function (scope, element, attributes) {
            element.bind("change", function (changeEvent) {
                var reader = new FileReader();
                reader.onload = function (loadEvent) {
                    scope.$apply(function () {
                        scope.fileread = loadEvent.target.result;
                    });
                }
                reader.readAsDataURL(changeEvent.target.files[0]);
            });
        }
    }
}]);

将作用域变量分配给fileread属性

<form ng-submit='create()'>
    ..
    .
    .
    <input type='file' fileread='logo' accept="image/*">
</form>