Question

我正在尝试在输入框上设置NG模型（如果重要的话，在表单内），但它似乎不会在$ scope上设置。每次我在控制器的if语句上设置一个断点＆＃39; lpScan＆＃39;总是空白的。我试图在屏幕上显示{{lpScan}}，但它似乎也没有在那里设置。有人对这可能是什么有任何想法吗？

以下是一小段控制器代码：

        $scope.submitLP = function () {

        $scope.lpScan = "";

        if (!$scope.checkInForm.$valid) {
            $scope.formValidate = 1;
            return;
        }


        if ($scope.scanRequired && $scope.lpScan !== $scope.lp.LPNumber) {
            FoundationApi.publish('load-notification',
                {
                    title: 'Invalid LP',
                    content: 'Must scan current LP to receive it.',
                    autoclose: '4000'
                });
        }

这是html

<div class="full-block">
        <form name="checkInForm">
            <div class="center data-item">
                <div class="button" ng-click="reprintLP()">Reprint LP</div>
            </div>
            <div class="data-item" ng-if="scanRequired && !lp.CheckedIn"
            </div>
            <div class="data-label-narrow">Scan LP:</div>
            <div class="data-wide"><input id="assignLP" autocomplete="off" type="tel"
                                          ng-keypress="processKeystroke(event)"
                                          ng-model="lpScan" placeholder="Scan LP" name="LPNumber"
                                          required ng-pattern="/^\d+$/" ng-minlength="20" ng-maxlength="20"
                                          ng-trim="true"/>
                <div class="data-error"
                     ng-if="(checkInForm.LPNumber.$dirty || formValidate === 1) && checkInForm.LPNumber.$invalid">
                    LPNumber must be 20 digits
                </div>
            </div>
    </div>
    </form>

Answer 1

首先，您的示例代码HTML中有一个破损的div。

<div class="data-item" ng-if="scanRequired && !lp.CheckedIn"

尝试在ng-change input上添加ng-change="watchInput()"，然后在你的控制器中添加

$scope.watchInput = function() {
    console.log($scope.lpScan);
}

检查您的控制台日志，看看您是否正在进行日志记录。如果是，那么只需将可操作的代码放在该函数中。

Answer 2

看起来您每次触发submitLP函数时都会将$ scope.lpScan变量重置为空白，因此请在提交函数之外声明它：

Public Function list_of_points_on_arc(point_center As PointLatLng, point_arc_start As PointLatLng, point_arc_end As PointLatLng, direction As String) As List(Of PointLatLng)

        'direction: CW - clockwise / CC - Counter Clockwise

        Const radiusEarthKilometres As Double = 6371.01

        'sets the resolution of arc
        Dim elements As Integer = 20

        'unknown point on arc, each ...element
        Dim point_on_arc As PointLatLng

        'List collects all points aon arc
        Dim gpollist As List(Of PointLatLng) = New List(Of PointLatLng)

        For i As Integer = 0 To elements
            ' ?????????????????????????????????????????????????????????
            'calculates new point_on_arc based on following information
            ' - elements, point_center, point_arc_start, point_arc_end
            ' ...
            '
            ' ...
            ' 
            ' point_on_arc = New PointLatLng(on_arc_lat, on_arc_lon)
            ' ?????????????????????????????????????????????????????????

            'adds point_on_arc to list
            gpollist.Add(point_on_arc)
        Next

        'returns list of pointsLatLon
        Return gpollist
    End Function

这是一个例子： https://plnkr.co/edit/jcLsGoVFCXkmv1SnUdHl?p=preview

Angular NG-Model没有设置

2 个答案: