2
我正在爲應用程序執行介紹屏幕。此屏幕（3張幻燈片）僅在新用戶身上出現。所以我做的方式是：當使用ng時，離子視圖標題不顯示 - 如果
默認路由總是將這個簡介屏幕
從前奏屏控制器，檢查（餅乾），看看用戶是否已經見過這個屏幕。視具體情況而定，撥打
$scope.showIntro。然後做$state.go()到下一個主要應用程序屏幕。在介紹視圖中，使用
ng-if="showIntro"。所以如果$ scope.showIntro == false，那麼DOM是空白的。
這裏是棘手的部分：
有沒有辦法來檢查用戶是否已經看到這個畫面或不是因爲我使用
$localStorage，它不存在應用程序（ ）當我創建路線。這就是爲什麼我必須在控制器中執行此檢查邏輯。我不得不使用
ng-if，因爲如果我使用ng-show，速度太慢，用戶在路由到主屏幕之前會看到一段介紹屏幕。
問題：
如果我在ion-view組件使用ng-if，標題沒有得到刷新一旦DOM被注入到視圖一次。 這是爲什麼，以及如何解決這個問題？也許某種方式可以重新運行摘要？
代碼http://codepen.io/hawkphil/pen/jPLqge
angular.module('ionicApp', ['ionic'])
.config(function($stateProvider, $urlRouterProvider) {
$stateProvider
.state('intro', {
url: '/',
templateUrl: 'templates/intro.html',
controller: 'IntroCtrl'
})
.state('main', {
url: '/main',
templateUrl: 'templates/main.html',
controller: 'MainCtrl'
});
$urlRouterProvider.otherwise("/");
})
.controller('IntroCtrl', function($scope, $state, $ionicSlideBoxDelegate) {
$scope.title = "<b>CUSTOM</b> TITLE";
$scope.showIntro = true;
// Called to navigate to the main app
$scope.startApp = function() {
$state.go('main');
};
$scope.next = function() {
$ionicSlideBoxDelegate.next();
};
$scope.previous = function() {
$ionicSlideBoxDelegate.previous();
};
// Called each time the slide changes
$scope.slideChanged = function(index) {
$scope.slideIndex = index;
};
})
.controller('MainCtrl', function($scope, $state) {
console.log('MainCtrl');
$scope.toIntro = function(){
$state.go('intro');
}
});body {
cursor: url('http://ionicframework.com/img/finger.png'), auto;
}
.slider {
height: 100%;
}
.slider-slide {
padding-top: 80px;
color: #000;
background-color: #fff;
text-align: center;
font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
font-weight: 300;
}
#logo {
margin: 30px 0px;
}
#list {
width: 170px;
margin: 30px auto;
font-size: 20px;
}
#list ol {
margin-top: 30px;
}
#list ol li {
text-align: left;
list-style: decimal;
margin: 10px 0px;
}
.button.ng-hide{
display:none;
}<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
<title>Ionic App</title>
<link href="//code.ionicframework.com/nightly/css/ionic.css" rel="stylesheet">
<script src="//code.ionicframework.com/nightly/js/ionic.bundle.js"></script>
</head>
<body ng-app="ionicApp">
<ion-nav-bar class="bar-light">
<ion-nav-back-button>
</ion-nav-back-button>
</ion-nav-bar>
<ion-nav-view></ion-nav-view>
<script id="templates/intro.html" type="text/ng-template">
<ion-view view-title="{{ title }}" ng-if="showIntro">
<ion-nav-buttons side="left">
<button class="button button-positive button-clear no-animation"
ng-click="startApp()" ng-show="!slideIndex">
Skip Intro
</button>
<button class="button button-positive button-clear no-animation"
ng-click="previous()" ng-show="slideIndex > 0">
Previous Slide
</button>
</ion-nav-buttons>
<ion-nav-buttons side="right">
<button class="button button-positive button-clear no-animation"
ng-click="next()" ng-show="slideIndex != 2">
Next
</button>
<button class="button button-positive button-clear no-animation"
ng-click="startApp()" ng-show="slideIndex == 2">
Start using MyApp
</button>
</ion-nav-buttons>
<ion-slide-box on-slide-changed="slideChanged(index)">
<ion-slide>
<h3>Thank you for choosing the Awesome App!</h3>
<div id="logo">
<img src="http://code.ionicframework.com/assets/img/app_icon.png">
</div>
<p>
We've worked super hard to make you happy.
</p>
<p>
But if you are angry, too bad.
</p>
</ion-slide>
<ion-slide>
<h3>Using Awesome</h3>
<div id="list">
<h5>Just three steps:</h5>
<ol>
<li>Be awesome</li>
<li>Stay awesome</li>
<li>There is no step 3</li>
</ol>
</div>
</ion-slide>
<ion-slide>
<h3>Any questions?</h3>
<p>
Too bad!
</p>
</ion-slide>
</ion-slide-box>
</ion-view>
</script>
<script id="templates/main.html" type="text/ng-template">
<ion-view hide-back-button="true" view-title="Awesome">
<ion-content class="padding">
<h1>Main app here</h1>
<button class="button" ng-click="toIntro()">Do Tutorial Again</button>
</ion-content>
</ion-view>
</script>
</body>
</html>編輯1
http://plnkr.co/edit/1FYr6GK6xMQjp9hA3N0M?p=preview
回答以下的前妻僅當介紹狀態具有/作爲url路由時纔有效。但是如果你把/intro或其他網址，狀態不斷迭代（截圖）。
function config($stateProvider, $urlRouterProvider) {
$stateProvider
.state('intro', {
url: '/intro',
templateUrl: 'intro.html',
controller: 'IntroCtrl',
data: {
isIntro: true
},
})
.state('main', {
url: '/main',
templateUrl: 'main.html',
controller: 'MainCtrl',
data: {
isIntro: false
},
});
$urlRouterProvider.otherwise("/intro");
}
嘗試使用ng-show而不是ng-if。 – Ved