使用ng-repeat和ng-options創建下拉列表。一切都很好,除非當我點擊「添加」沒有選擇任何選項,控制檯給我錯誤「無法讀取屬性」選項'的未定義「AngularJS:無法讀取未定義的屬性「選項」
我希望默認選項是'select ...'但是當我使用$ scope.Girl ='選擇...',它說'女孩'未定義。請幫忙。
var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope) {
$scope.item = {
"styles": [{
"style": "Girl",
"options": [{
"option": "Select..."
}, {
"option": "Anna"
}, {
"option": "Betty"
}, {
"option": "Clara"
}]
}, {
"style": "Boy",
"options": [{
"option": "Select..."
}, {
"option": "Anthony"
}, {
"option": "Billy"
}, {
"option": "Charles"
}]
}]
};
$scope.addItems = function(items) {
var text = '';
angular.forEach(items.styles, function (style) {
text += style.style + ': ' + style.selectedItem.option + '. ';
});
$scope.selectedText = text;
};
});
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="[email protected]*" data-semver="1.3.1" src="//code.angularjs.org/1.3.1/angular.js"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<div>
<div ng-repeat="style in item.styles">
<label class="input-label">{{style.style}}</label>
<select ng-model="style.selectedItem" ng-options="option.option for option in style.options">
</select>
</div>
<button class="button button-icon ion-plus" ng-click="addItems(item)">
add
</button>
<div>
</div>
{{selectedText}}
</div>
</body>
</html>
Plunker:http://plnkr.co/edit/N6oO8c6tL1bw9FCYVmYz?p=preview
任何指針被理解。我的目標: 1.當沒有選擇一個選項時點擊「添加」按鈕,顯示「請選擇一個選項」的消息
- 兩個選項下拉默認值是「Select ... 「
謝謝!
請提供適當的書面解釋,說明這些代碼應該做什麼。見[問]。請注意,'style.selectedItem'不同於$ scope.selectedItem' – charlietfl