Ionic4组件-菜单:必须具有“ content”元素才能侦听其上的拖动事件

dav*_*esp 1 javascript typescript ionic-framework stenciljs ionic4

我有以下代码:

<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="x-ua-compatible" content="ie=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Ionic 4 - Menu</title>
<link rel="stylesheet" href="https://unpkg.com/@ionic/core@4.0.0-beta.13/css/ionic.bundle.css" />
<script src="https://unpkg.com/@ionic/core@4.0.0-beta.13/dist/ionic.js"></script>
<script>
window.addEventListener('load', event => {
    document.querySelector('.button_details').addEventListener('click', (event) => {
        document.querySelector('.menu_main').toggle();
    });
});
</script>
</head>
<body>

    <ion-menu class="menu_main" side="start">
        <ion-header>
            <ion-toolbar color="secondary">
                <ion-title>Left Menu</ion-title>
            </ion-toolbar>
        </ion-header>
        <ion-content padding>
            Hello World!
        </ion-content>
    </ion-menu>
    <ion-menu-controller></ion-menu-controller>

    <ion-card style="display:inline-block;width:300px">
        <ion-card-header>
            <ion-card-title>Hello World</ion-card-title>
        </ion-card-header>
        <div style="padding:10px 10px;text-align:right;">
            <ion-button color="primary" class="button_details">Details</ion-button>
        </div>
    </ion-card>

</body>

</html>
Run Code Online (Sandbox Code Playgroud)

它工作正常,但有一个例外:页面加载时,控制台上出现以下错误:

Error: "Menu: must have a 'content' element to listen for drag events on."
Run Code Online (Sandbox Code Playgroud)

在这里,您有CodePen.io

https://codepen.io/anon/pen/qJgEzZ/?editors=1011

在下面,您可以在此处尝试代码StackOverflow

<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="x-ua-compatible" content="ie=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Ionic 4 - Menu</title>
<link rel="stylesheet" href="https://unpkg.com/@ionic/core@4.0.0-beta.13/css/ionic.bundle.css" />
<script src="https://unpkg.com/@ionic/core@4.0.0-beta.13/dist/ionic.js"></script>
<script>
window.addEventListener('load', event => {
    document.querySelector('.button_details').addEventListener('click', (event) => {
        document.querySelector('.menu_main').toggle();
    });
});
</script>
</head>
<body>

    <ion-menu class="menu_main" side="start">
        <ion-header>
            <ion-toolbar color="secondary">
                <ion-title>Left Menu</ion-title>
            </ion-toolbar>
        </ion-header>
        <ion-content padding>
            Hello World!
        </ion-content>
    </ion-menu>
    <ion-menu-controller></ion-menu-controller>

    <ion-card style="display:inline-block;width:300px">
        <ion-card-header>
            <ion-card-title>Hello World</ion-card-title>
        </ion-card-header>
        <div style="padding:10px 10px;text-align:right;">
            <ion-button color="primary" class="button_details">Details</ion-button>
        </div>
    </ion-card>

</body>

</html>
Run Code Online (Sandbox Code Playgroud)
Error: "Menu: must have a 'content' element to listen for drag events on."
Run Code Online (Sandbox Code Playgroud)

关于如何解决此问题的任何想法?这里缺少什么?

您能给我CodePen.io一个正确的密码吗?

谢谢!

dea*_*lls 18

ion-menu需要contentIdion-router-outlet需求的id,所以菜单contentId必须ion-router-outletID:

<ion-menu side="start" contentId="menuContent">
   <ion-header>
        <ion-toolbar color="primary">
            <ion-title>Start Menu</ion-title>
        </ion-toolbar>
    </ion-header>
    <ion-content>
        <ion-list>
            <ion-item>Menu Item</ion-item>
            <ion-item>Menu Item</ion-item>
            <ion-item>Menu Item</ion-item>
            <ion-item>Menu Item</ion-item>
            <ion-item>Menu Item</ion-item>
        </ion-list>
    </ion-content>
</ion-menu>

<ion-router-outlet id="menuContent"></ion-router-outlet>
Run Code Online (Sandbox Code Playgroud)

  • 感谢你的回答。许多教程已经过时并且没有反映这一点。 (2认同)

Aar*_*dan 8

对于将来的那些人,您可能会遇到在离子分裂窗格中有路由器插座的问题,对吗?

做这个:

<ion-split-pane contentId="my-content">
     <ion-menu contentId="my-content"> ... </ion-menu>
     <ion-router-outlet id="my-content"></ion-router-outlet>
</ion-split-pane>
Run Code Online (Sandbox Code Playgroud)

请注意,您的 [main] 属性ion-router-outlet现已消失

来源:https : //github.com/ionic-team/ionic/issues/19618#issuecomment-540648915


Tho*_*mas 5

如果不需要滑动手势来打开菜单,则可以将swipe-gesture="false"属性添加到ion-menu标签。海事组织,这应该摆脱错误,但目前还没有。我在GitHub上创建了一个问题https://codepen.io/anon/pen/mzgRBj?editors=1011

如果希望滑动手势起作用,则必须ion-menu使用content-id属性在元素上引用内容元素的ID ,请参阅https://codepen.io/anon/pen/BqEpxE?editors=1011


man*_*mar 5

如果您需要代码:使用content-id="content"和关于离子含量id="content"

<ion-menu class="menu_main" side="start" content-id="content">
        <ion-header>
            <ion-toolbar color="secondary">
                <ion-title>Left Menu</ion-title>
            </ion-toolbar>
        </ion-header>
        <ion-content padding>
            Hello World!
        </ion-content>
    </ion-menu>
    <ion-menu-controller></ion-menu-controller>

    <ion-content id="content">
     <ion-card style="display:inline-block;width:300px">
        <ion-card-header>
            <ion-card-title>Hello World</ion-card-title>
        </ion-card-header>
        <div style="padding:10px 10px;text-align:right;">
            <ion-button color="primary" class="button_details">Details</ion-button>
        </div>
    </ion-card>
</ion-content>
Run Code Online (Sandbox Code Playgroud)