Javascript AngularJS:$注意选择输入
我知道我们可以使用ng change来解决这个问题,但我想了解为什么$watch在select上不起作用。也许我做错了什么,但似乎我不是唯一一个与之斗争的人。 这是我的密码: HTML:Javascript AngularJS:$注意选择输入,javascript,angularjs,ionic-framework,Javascript,Angularjs,Ionic Framework,我知道我们可以使用ng change来解决这个问题,但我想了解为什么$watch在select上不起作用。也许我做错了什么,但似乎我不是唯一一个与之斗争的人。 这是我的密码: HTML: 感谢…让它正常工作您需要对代码进行大量更改,您需要将所有与服务器相关的信息放在一个名为self.serverInfo的对象中,该对象将包含有关server&servers的信息。直接使用scope绑定此变量将根据JavaScript原型继承自动更新绑定 HTML <body ng-controller="
感谢…让它正常工作您需要对代码进行大量更改,您需要将所有与服务器相关的信息放在一个名为
self.serverInfo
的对象中,该对象将包含有关server
&servers
的信息。直接使用scope绑定此变量将根据JavaScript原型继承自动更新绑定
HTML
<body ng-controller="SettingsCtrl">
<div class="list">
<label class="item item-input item-select">
<div class="input-label">
Server
</div>
{{serverInfo}}
<select ng-model="serverInfo.server"
ng-options="s as s.label for s in serverInfo.servers">
</select>
</label>
</div>
</body>
我接受@pankajparkar的回答,但我想展示我的最终代码,因为事实上,通过@pankajparkar建议的适当绑定,我不再需要$watch了 HTML
ServerSelection服务是否应该返回一些东西,否?@curuba这是我的错,您需要在
'ServerSelection.server'
Hmm上加上手表,这不起作用。如果HTML部分只是注入控制器中,但未分配给$scope内的变量,则它似乎无法访问serverSelection服务。@curuba现在查看我更新的代码&plunkr..一切正常..我将更新答案的描述..过了一会儿,我错过了您的链接:$scope.serverSelection=serverSelection;现在它正在触发$watch,my serverSelection.server已更新,但my serverSelection.url未更新。我想我需要在我的服务中创建一个从$watch调用的方法。这就是我在chat+1Thanks@pankajpankar中试图说的
.controller('SettingsCtrl', function ($scope, $log, serverSelection) {
//List of servers to connect to
$scope.serverschoice = serverSelection.servers;
$scope.server = serverSelection.server;
$scope.$watch('server', function(NewValue, OldValue) {
serverSelection.server = NewValue;
$scope.url = serverSelection.url;
}, true);
})
.service("serverSelection", function() {
var self = this;
self.servers = [
{ label: 'Production', value: 1, url: 'url1' },
{ label: 'Training', value: 2, url: 'url2' },
{ label: 'Local', value: 3, url: 'url2' }
];
self.server = self.servers[1];
console.log(self.server);
self.url = self.server.url;
})
<body ng-controller="SettingsCtrl">
<div class="list">
<label class="item item-input item-select">
<div class="input-label">
Server
</div>
{{serverInfo}}
<select ng-model="serverInfo.server"
ng-options="s as s.label for s in serverInfo.servers">
</select>
</label>
</div>
</body>
var app = angular.module('app',[]);
app.controller('SettingsCtrl', function ($scope, $log, serverSelection) {
//List of servers to connect to
$scope.serverInfo= serverSelection.serverInfo;
$scope.$watch('serverInfo.server', function(NewValue, OldValue) {
$scope.url = $scope.serverInfo.server.url;
}, true);
})
app.service("serverSelection", function() {
var self = this;
self.serverInfo = {};
self.serverInfo.servers = [
{ label: 'Production', value: 1, url: 'url1' },
{ label: 'Training', value: 2, url: 'url2' },
{ label: 'Local', value: 3, url: 'url2' }
];
self.serverInfo.server = self.serverInfo.servers[1];
console.log(self.server);
self.serverInfo.url = self.serverInfo.server.url;
})
<div class="list">
<label class="item item-input item-select">
<div class="input-label">
Serveur
</div>
<select ng-model="serverSelection.server" ng-options="s as s.label for s in serverSelection.servers">
</select>
</label>
</div>
<p>URL: {{serverSelection.server.url}}</p>
.controller('SettingsCtrl', function ($scope, $log, serverSelection) {
//List of servers to connect to
$scope.serverSelection= serverSelection;
})
.service("serverSelection", function() {
var self = this;
self.servers = [
{ label: 'Production', value: 1, url: 'url0' },
{ label: 'Training', value: 2, url: 'url1' },
{ label: 'Local', value: 3, url: 'url2' }
];
self.server = self.servers[1];
})