Table of Contents
Page properties
Page.waitFor()方法
Page.data()方法
Page.setData()方法
Page.size()方法
Page.callMethod() 方法
Home Web Front-end uni-app What is the usage of uni-app page?

What is the usage of uni-app page?

Sep 15, 2021 pm 01:52 PM
uni-app

uni-app page module provides methods to control the page. The usage methods are: 1. "page.$('.index-desc')"; 2. "page.$$('.list- text')"; 3. "await page.waitFor('picker')" and so on.

What is the usage of uni-app page?

The operating environment of this article: Windows 7 system, uni-app version 2.5.1, DELL G3 computer

Usage of uni-app page What is it?

Page of uni-app——Methods to control the page

Page module provides methods to control the page.

Page properties

##pathPage pathStringqueryPage parametersObject data Rendering data of the page Object
Properties Description Return type
Page method

##$##(selector: string)Element(condition: string | number | FunctionvoidObjectObject#(method: string, ...args: any[])
Method Parameters ##Description Return value
Get page elements<code> <code>$$
(selector: string) <code><code>Get the page element array Element[] <code><code>waitFor
)<code><code><code>Wait until the condition is true <code><code><code>data
(path ?: String)<code><code><code><code>Get page rendering data Object<code><code><code><code>setData
<code><code><code>## (data: Object)<code><code><code><code><code>Set page rendering data <code><code><code><code>##size
<code><code>None<code><code><code><code><code><code>##Get the size of the page <code><code><code><code>##scrollTop
none<code><code><code><code><code><code><code><code> Get the page number scroll positionNumber <code><code><code>## callMethod<code>
<code><code><code><code><code><code><code><code><code>Call the specified method on the pageany <code><code><code>page.$() method <code>$() method is used Get the elements of the page. Input parameter description of $method:
Field

TypeselectorThe sample code is as follows: page.$$() method$ The $() method is used to obtain the page number element array. Input parameter description of $$ method:
Required Default value Description String is
Selector<code>
1 const page = await program.currentPage()
2 const element = await page.$('.index-desc')
3 console.log(element.tagName) // 'view'
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Field

TypeSelector

示例代码如下:

1 const page = await program.currentPage()
2 const elements = await page.$$('.list-text')
3 console.log(elements.length)
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Page.waitFor()方法

waitFor()方法用于等待直到条件成立。waitFor方法参数说明

Required ##Default value Description selector Stringis
<code>
字段 类型 必填 默认值 说明
<code>condition String Number Function   等待条件
  • 如果条件是string类型时,那么该参数会被当成选择器,当该选择器选中元素个数不为零时,结束等待。
  • 如果条件是number,那么该参数会被当成超时时长,当经过指定时间后,结束等待。
  • 如果条件是FUnction类型,那么该参数会被当成断言函数,当该函数返回真时,结束等等。

示例代码如下:

1 const page = await program.currentPage() await page.waitFor(5000) // 等待 5 秒
2 await page.waitFor(&#39;picker&#39;) // 等待页面中出现 picker 元素
3 await page.waitFor(async() = >{
4     return (await page.$$(&#39;picker&#39;)).length > 5
5 }); // 等待页面中 picker 元素数量大于 5
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Page.data()方法

data()方法用于获取页码数据。data()方法参数如下:

字段类型必填默认值说明
<code>pathString 数据路径

示例代码如下:

1 const page = await program.currentPage();
2 console.log(await page.data(&#39;list&#39;));
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Page.setData()方法

setData()方法用于设置页面的渲染数据。setData()方法参数如下:

字段类型必填默认值说明
<code>dataObject 要改变的数据

示例代码如下:

1 const page = await program.currentPage();
2 await page.setData({
3     text: &#39;changed data&#39;4 });
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Page.size()方法

size()方法获取页面的大小。size()的返回值如下:

字段 类型 说明
width number 页面可滚动宽度
height number 页面可滚动高度

Page.callMethod() 方法

callMethod()方法用于调用页面的指定方法。callMethod()的参数说明如下:

字段 类型 必填 默认值 说明
<code>method String  - 需要调用的方法名
<code>...args  array - 方法参数

推荐学习:《uni-app教程

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