我的应用有一个聊天按钮，可以打开$mdDialog。在对话框窗口中单击用户名时，我使用$mdDialog.hide()关闭对话框窗口。这有效但当我再次点击聊天按钮时，它不再有效。
感谢您的帮助。 Heres a link to my codepen.
<div ng-app="MyApp" ng-controller="AppCtrl">
<div id="menubar">
<div class="logo"><a href="#"><img src="http://i.imgur.com/yS9Ug9Z.png"/></a></div>
<ul class="middle">
<div class="r1">Project Name <i class="glyphicon glyphicon-pencil"></i></div>
<ul class="r2">
<li class="dropdown">
<button href="#" data-toggle="dropdown" class="dropdown-btn">File</button>
<ul class="dropdown-menu">
<li><a href="#">Action 1</a></li>
<li><a href="#">Action 2</a></li>
<li><a href="#">Action 3</a></li>
</ul>
</li>
<li class="dropdown">
<button href="#" data-toggle="dropdown" class="dropdown-btn">Edit</button>
<ul class="dropdown-menu">
<li><a href="#">Action 1</a></li>
<li><a href="#">Action 2</a></li>
<li><a href="#">Action 3</a></li>
</ul>
</li>
<li class="dropdown">
<button href="#" data-toggle="dropdown" class="dropdown-btn">Help</button>
<ul class="dropdown-menu">
<li><a href="#">Action 1</a></li>
<li><a href="#">Action 2</a></li>
<li><a href="#">Action 3</a></li>
</ul>
</li>
</ul>
</ul>
<div class="menu-btns">
<button id="comment-btn"><i class="material-icons">assignment</i> <span>Comment</span></button>
<button id="share-btn"><i class="material-icons">supervisor_account</i> <span>Share</span></button>
<button id="chat-btn" ng-click="openChatDialog()"><i class="material-icons">chat</i> <span>Chat</span></button>
</div>
<button id="user-btn"></button>
<div id="user-drop" class="shadow-1">
<ul>
<li>Smile</li>
<li>You</li>
<li>Goodlookin</li>
<li>Get Shwify</li>
<li>Cellar Door Is Beautiful</li>
<hr/>
<li>Your Profile</li>
<ul class="links">
<li>Link1</li>
<li>Link2</li>
<li>Link3</li>
</ul>
</ul>
</div>
</div>
<div id="chat-cntnr">
<div ng-repeat="chat in chat.openChats" class="chat-box">
<div class="chat-header">
<button ng-click="closeChat()" class="chat-h-btn chat-close"><i class="glyphicon glyphicon-remove"></i></button>
</div>
</div>
</div>
</div>
angular.module('MyApp', ['ngMaterial', 'ngMessages', 'material.svgAssetsCache'])
.controller('AppCtrl', function($scope, $mdDialog) {
//CHAT
$scope.chat = {};
$scope.chat.openChats = [];
$scope.collaborators = ['Dan', 'Miles', 'Ryan', 'kevin'];
var chatCntnr = document.getElementById('chat-cntnr');
// open a chat box
var isChatOpen = function(user) {
if ($scope.chat.openChats.indexOf(user) < 0) return false;
else return true;
};
$scope.openChat = function(user) {
if (!isChatOpen(user)) {
if (chatCntnr.style.display !== 'flex') {
chatCntnr.style.display = 'flex';
}
$scope.chat.openChats.push(user);
}
$mdDialog.hide();
};
// close a chat box
$scope.closeChat = function(user) {
console.log('hi');
//$scope.chat.openChats.splice($scope.openChats.indexOf(user), 1);
};
// CHAT DIALOG
$scope.openChatDialog = function() {
$mdDialog.show({
scope: $scope,
controller: 'AppCtrl',
template: '<md-button ng-click="openChat(\'everybody\')">Everybody</md-button><md-button ng-repeat="user in collaborators" ng-click="openChat(user)"><svg class="status-light" height="17" width="17"><circle cx="8" cy="8" r="8" fill="lightGreen" /></svg>{{user}}</md-button>',
hasBackdrop: false,
clickOutsideToClose: true,
openFrom: '#chat-btn',
closeTo: '#chat-btn'
})
};
});
// chat dialog
// chat
/**
* MENUBAR
*/
var dropdownBtns = document.querySelectorAll('.middle .dropdown-btn');
var dropdowns = document.querySelectorAll('.middle .dropdown');
var userBtn = document.getElementById('user-btn');
var userDrop = document.getElementById('user-drop');
document.addEventListener('click', (e) => {
if (userDrop.classList.contains('open')) {
userDrop.classList.toggle('open');
}
});
userBtn.addEventListener('click', (e) => {
userDrop.classList.toggle('open');
e.stopPropagation();
})
for (var i = 0; i < dropdownBtns.length; i++) {
(function() {
var dropdownBtn = dropdownBtns[i];
var k = i;
dropdownBtn.addEventListener('mouseover', () => {
var x = isDropOpen();
if (x > -1 && x !== k) {
dropdowns[x].classList.toggle('open');
dropdowns[k].classList.toggle('open');
}
})
})();
}
var isDropOpen = () => {
for (var i = 0; i < dropdowns.length; i++) {
var dropdownClasses = dropdowns[i].classList;
if (dropdownClasses.contains('open')) return i;
}
return -1;
}
/**
* menubar
*/
html, body {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
html ul, body ul {
padding: 0;
margin: 0;
}
#menubar {
font-family: sans-serif;
background-color: black;
display: flex;
position: relative;
white-space: nowrap;
}
#menubar .logo {
display: flex;
align-items: center;
padding: 10px;
background-color: lightGrey;
}
#menubar .logo img {
height: 40px;
}
#menubar .middle {
padding: 10px;
padding-top: 8px;
padding-bottom: 0px;
color: white;
width: 100%;
position: relative;
font-family: inherit;
margin-left: 8px;
margin-right: 20px;
}
#menubar .middle .r1 {
font-size: 20px;
}
#menubar .middle .r1 i {
position: relative;
top: -1px;
font-size: 12px;
font-weight: 700;
margin-left: 2px;
cursor: pointer;
}
#menubar .middle .r1 i:hover {
color: lightGrey;
}
#menubar .middle .r2 {
margin-top: 2px;
margin-left: -6px;
font-size: 15px;
padding-bottom: 6px;
}
#menubar .middle .r2 li {
display: inline-block;
}
#menubar .middle .dropdown-btn {
position: relative;
outline: 0;
background-color: transparent;
border: none;
cursor: pointer;
padding: 2px 6px;
z-index: 100;
margin: 0 1px;
margin-top: 1px;
}
#menubar .middle .dropdown-btn:hover {
background-color: grey;
}
#menubar .middle .open .dropdown-btn {
background-color: black;
margin: 0 !important;
border: white 1px solid;
border-bottom: none;
}
#menubar .middle .dropdown-menu {
background-color: black;
border: white 1px solid;
border-radius: 0;
margin-top: -1px;
z-index: 10;
}
#menubar .middle .dropdown-menu li {
display: block;
}
#menubar .middle .dropdown-menu a {
color: white;
}
#menubar .middle .dropdown-menu a:hover {
background-color: dodgerBlue;
}
#menubar .menu-btns {
display: flex;
margin: 12px;
margin-right: 0px;
color: white;
right: 0;
}
#menubar .menu-btns button {
outline: 0;
position: relative;
background-color: transparent;
border-radius: 2px;
border: #343436 3px solid;
margin: 0 5px;
padding: 2px 12px;
font-size: 15px;
white-space: nowrap;
}
#menubar .menu-btns button:hover {
background-color: #4d4d50;
}
#menubar .menu-btns button i {
position: relative;
top: 5px;
color: #aeaeae;
}
#menubar .menu-btns button span {
position: relative;
top: -3px;
}
#user-btn {
margin: 10px;
margin-bottom: 8px;
outline: 0;
width: 70px;
background: url("https://www.fillmurray.com/70/92");
border: none;
border-radius: 2px;
}
#chat-btn {
background-color: #343436 !important;
}
#chat-btn:hover {
background-color: #4d4d50 !important;
}
.shadow-1 {
box-shadow: 0 2px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
transition: all 0.2s ease-in-out;
}
#user-drop {
display: none;
position: absolute;
right: 0;
top: 100%;
background-color: white;
}
#user-drop ul {
list-style-type: none;
padding: 6px 0;
padding-bottom: 2px;
font-size: 15px;
font-weight: 500;
}
#user-drop ul li {
cursor: pointer;
padding: 4px 16px;
padding-right: 38px;
}
#user-drop ul li:hover {
background-color: #e7e7e7;
}
#user-drop ul hr {
margin: 8px 0;
border-top: black 1px solid;
}
#user-drop ul .links {
padding-top: 0;
}
#user-drop ul .links li {
display: inline-block;
padding-right: 2px;
font-size: 11px;
color: darkGrey;
}
#user-drop ul .links li:hover {
background-color: white;
color: black;
}
#user-drop.open {
display: initial;
}
md-dialog {
position: absolute;
right: 25px;
top: 80px;
}
md-dialog svg {
position: absolute;
left: 16px;
top: 11px;
}
#chat-cntnr {
display: none;
position: fixed;
bottom: 0;
right: 0;
}
#chat-cntnr .chat-box {
height: 150px;
width: 150px;
background-color: blue;
border: 1px solid black;
margin: 0 4px;
}
#chat-cntnr .chat-box:last-child {
margin-right: 0;
}
答案 0 :(得分：16)
我检查了你的codepen，在尝试了一些事情后，我注意到你删除“scope：$ scope”行时问题就解决了。
当我查看docs for $ngDialog时，我发现了一个与您共享父作用域的示例，但它添加了一个额外的选项“preserveScope：true”。请参阅以下文档中的示例。
// Dialog #3 - Demonstrate use of ControllerAs and passing $scope to dialog
// Here we used ng-controller="GreetingController as vm" and
// $scope.vm === <controller instance="">
function showCustomGreeting() {
$mdDialog.show({
clickOutsideToClose: true,
scope: $scope, // use parent scope in template
preserveScope: true, // do not forget this if use parent scope
// Since GreetingController is instantiated with ControllerAs syntax
// AND we are passing the parent '$scope' to the dialog, we MUST
// use 'vm.<xxx>' in the template markup
template: '<md-dialog>' +
' <md-dialog-content>' +
' Hi There {{vm.employee}}' +
' </md-dialog-content>' +
'</md-dialog>',
controller: function DialogController($scope, $mdDialog) {
$scope.closeDialog = function() {
$mdDialog.hide();
}
}
});
}
有关文档范围选项的更多详细信息。
scope - {object =}：将模板/控制器链接到的范围。如果未指定，则将创建新的隔离范围。除非将preserveScope设置为true，否则在删除对话框时将销毁此作用域。
这似乎也使你的chatDialog。请参阅updated codepen。
您正在使用“AppCtrl”控制器进行对话。这将在对话框中重新实例化控制器。它现在应该如下所示。
$scope.openChatDialog = function() {
$mdDialog.show({
scope: $scope,
preserveScope: true,
template: '<md-button ng-click="openChat(\'everybody\')">Everybody</md-button><md-button ng-repeat="user in collaborators" ng-click="openChat(user)"><svg class="status-light" height="17" width="17"><circle cx="8" cy="8" r="8" fill="lightGreen" /></svg>{{user}}</md-button>',
hasBackdrop: false,
clickOutsideToClose: true,
openFrom: '#chat-btn',
closeTo: '#chat-btn'
})
};