What is iScroll? Detailed explanation of iScroll usage examples
The creation of iScroll:
The creation of iScroll is entirely due to the mobile webkit browser, such as on iPhone and Android mobile devices.
How to use iScroll:
The principle of iScroll is that there is an overflow hidden (overflow:hidden;) DOM in the outer layer, and then the first DOM structure in this area will be instantiated, and its wrapper The content can be scrolled vertically or horizontally, so when using iScroll, the scrolling elements should be as simple as possible, reduce the number of DOMs, and reduce nesting, because the more complex the DOM structure is, the more difficult it will be for iScroll to run, which may cause Some nodes show abnormal behavior. Therefore, the recommended DOM structure is as follows:
<p id="wrapper">//overflow:hidden; <ul> //只有第一个DOM结构（ul）被实例化，这个DOM可以纵向或者横向的滚动， //多出的内容会被wrapper的样式hidden。 <li>1</li> <li>2</li> <li>3</li> </ul> </p>
Note: Once again, only the first child element (ul) in the wrapper can be instantiated and scrolled, and To achieve scrolling, it must be combined with the outer DOM (wrapper).
What if there are multiple uls in the wrapper? It's very simple. Remember that sentence, only the first child element (ul) in the wrapper can be instantiated and scrolled:
<p id="wrapper">//overflow:hidden; <p id="first"> //只有第一个DOM结构(ul)被实例化，这个DOM可以纵向或者横向的滚动， //多出的内容会被wrapper的样式hidden <ul> <li>1</li> <li>2</li> <li>3</li> </ul> <ul> <li>4</li> <li>5</li> <li>6</li> </ul> </p> </p>
See, only the first will be instantiated. Note: You don’t need to write the ID of the first DOM structure here (first). I just wrote an ID to facilitate everyone’s identification, but the outermost ID (wrapper) must be written because it is needed when JS is instantiated. Fill in this ID:
var myScroll = new iScroll("wrapper");How should iScroll be instantiated:
Now that instantiation is mentioned, when should we instantiate it? change? It is said that there are many methods of instantiation, but I have never used them. I will only say one:
(1) Load iscroll.js and uw3c of the current page at the bottom of the HTML (uw3c.html) page (after body and before html) .js, this ensures that the HTML DOM structure can be loaded.
(2) Instantiate iScroll before JS inserts the page DOM structure and data, that is, instantiate it at the beginning of JS, because JS may be used to insert DOM or data later, so as to ensure that iScroll is inserted before data is inserted. Already instantiated.
HTML://HTML structure
<html > <body> ...code... </body> //插入iscroll.js文件 <script type="text/javascript" src="js/iscroll.js" > </script > //插入本页面JS文件 <script type="text/javascript" src="js/uw3c.js" > </script > </html>
JS://JS file content
var myscroll;
function iscroll(data){
//实例化iScroll
myscroll=new iScroll("wrapper");
pageData(data);
}
function pageData(obj){
$("body").html(obj);
myscroll.refresh();//当DOM结构发生变化的时候，需要刷新iScroll
}
iscroll("<p>pagedata</p>");Parameters in iScroll:
When instantiating iScroll, you can pass in two parameters. The first parameter is the ID of the instantiated outer DOM, and the second parameter The parameter is the object of the iScroll execution method:
var myscroll=new iScroll("wrapper",{hScrollbar:false});
或者
var opts = {
vScroll:false,//禁止垂直滚动
snap:true,//执行传送带效果
hScrollbar:false//隐藏水平方向上的滚动条
};
var myscroll = new iScroll("wrapper",opts);The content of the second parameter is as follows. This parameter will control the effect of iScroll:
hScroll false 禁止横向滚动 true横向滚动 默认为true vScroll false 禁止垂直滚动 true垂直滚动 默认为true hScrollbar false隐藏水平方向上的滚动条 vScrollbar false 隐藏垂直方向上的滚动条 fadeScrollbar false 指定在无渐隐效果时隐藏滚动条 hideScrollbar 在没有用户交互时隐藏滚动条 默认为true bounce 启用或禁用边界的反弹，默认为true momentum 启用或禁用惯性，默认为true，此参数在你想要保存资源的时候非常有用 lockDirection false取消拖动方向的锁定，true拖动只能在一个方向上（up/down 或者left/right）
Methods in iScroll:
Of course, in the second parameter, there are also some methods that can be executed:
(1)scrollTo(x, y, time, relative) method: pass in 4 parameters: X-axis scrolling distance, Y-axis scrolling distance, effect time, whether it is relative to the current position. So for example:
//在200毫秒的时间内，Y轴向上滚动100像素； uw3c.scrollTo(0, -100, 200) //在200毫秒的时间内，相对于当前位置，X轴向左滚动100像素； uw3c.scrollTo(-100, 0, 200, true)
(2)refresh() method: After the DOM structure changes, iScroll needs to be refreshed, otherwise the scrolling plug-in will be instantiated inaccurately ：
uw3c.refresh();//刷新iScroll
(3) onPosChange, is there a method that can return the change of position? You can check if there is an onPosChange method in the iScroll you are using:
onPosChange:function(x,y){
if(y < -200){
//如果Y周向上滚动200像素，$("#uw3c")就显示，否则就隐藏。
$("#uw3c").show();
}else{
$("#uw3c").hide();
}
} (4) onScrollEnd: event executed when the scroll ends. If you want to When you touch an event, this method will be useful:
//滚动结束后，执行的方法，滚动后会出现提示框alert("phpcn")
onScrollEnd:function(){
alert("phpcn");
} (5) onRefresh: After the DOM structure changes, iScroll needs to be refreshed, otherwise The scrolling plug-in will be instantiated inaccurately, and onRefresh is the method that will be executed after iScroll is refreshed.
(6) onBeforeScrollStart: The time callback before starting scrolling. The default is to prevent the browser's default behavior.
(7) onScrollStart: callback to start scrolling.
(8)onBeforeScrollMove: Callback before content moves.
(9) onScrollMove: callback for content movement.
(10) onBeforeScrollEnd: Callback before the end of scrolling.
(11) onTouchEnd: Callback after the hand leaves the screen.
(12) onDestroy: callback to destroy the instance.
The above is the detailed content of What is iScroll? Detailed explanation of iScroll usage examples. For more information, please follow other related articles on the PHP Chinese website!
Javascript Data Types : Is there any difference between Browser and NodeJs?May 14, 2025 am 12:15 AMJavaScript core data types are consistent in browsers and Node.js, but are handled differently from the extra types. 1) The global object is window in the browser and global in Node.js. 2) Node.js' unique Buffer object, used to process binary data. 3) There are also differences in performance and time processing, and the code needs to be adjusted according to the environment.
JavaScript Comments: A Guide to Using // and /* */May 13, 2025 pm 03:49 PMJavaScriptusestwotypesofcomments:single-line(//)andmulti-line(//).1)Use//forquicknotesorsingle-lineexplanations.2)Use//forlongerexplanationsorcommentingoutblocksofcode.Commentsshouldexplainthe'why',notthe'what',andbeplacedabovetherelevantcodeforclari
Python vs. JavaScript: A Comparative Analysis for DevelopersMay 09, 2025 am 12:22 AMThe main difference between Python and JavaScript is the type system and application scenarios. 1. Python uses dynamic types, suitable for scientific computing and data analysis. 2. JavaScript adopts weak types and is widely used in front-end and full-stack development. The two have their own advantages in asynchronous programming and performance optimization, and should be decided according to project requirements when choosing.
Python vs. JavaScript: Choosing the Right Tool for the JobMay 08, 2025 am 12:10 AMWhether to choose Python or JavaScript depends on the project type: 1) Choose Python for data science and automation tasks; 2) Choose JavaScript for front-end and full-stack development. Python is favored for its powerful library in data processing and automation, while JavaScript is indispensable for its advantages in web interaction and full-stack development.
Python and JavaScript: Understanding the Strengths of EachMay 06, 2025 am 12:15 AMPython and JavaScript each have their own advantages, and the choice depends on project needs and personal preferences. 1. Python is easy to learn, with concise syntax, suitable for data science and back-end development, but has a slow execution speed. 2. JavaScript is everywhere in front-end development and has strong asynchronous programming capabilities. Node.js makes it suitable for full-stack development, but the syntax may be complex and error-prone.
JavaScript's Core: Is It Built on C or C ?May 05, 2025 am 12:07 AMJavaScriptisnotbuiltonCorC ;it'saninterpretedlanguagethatrunsonenginesoftenwritteninC .1)JavaScriptwasdesignedasalightweight,interpretedlanguageforwebbrowsers.2)EnginesevolvedfromsimpleinterpreterstoJITcompilers,typicallyinC ,improvingperformance.
JavaScript Applications: From Front-End to Back-EndMay 04, 2025 am 12:12 AMJavaScript can be used for front-end and back-end development. The front-end enhances the user experience through DOM operations, and the back-end handles server tasks through Node.js. 1. Front-end example: Change the content of the web page text. 2. Backend example: Create a Node.js server.
Python vs. JavaScript: Which Language Should You Learn?May 03, 2025 am 12:10 AMChoosing Python or JavaScript should be based on career development, learning curve and ecosystem: 1) Career development: Python is suitable for data science and back-end development, while JavaScript is suitable for front-end and full-stack development. 2) Learning curve: Python syntax is concise and suitable for beginners; JavaScript syntax is flexible. 3) Ecosystem: Python has rich scientific computing libraries, and JavaScript has a powerful front-end framework.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
SublimeText3 Chinese version
Chinese version, very easy to use
SublimeText3 Mac version
God-level code editing software (SublimeText3)
