这篇文章主要介绍了微信小程序block的使用 ,微信小程序最近非常火热,实现起来也很简单,只要block就可以实现,需要的朋友可以参考下
经过一年的发展,微信小程序发展火热,本期就介绍下小程序的一些使用。
在安卓中我们经常会使用ListView/GradeView/RecyclerView来实现展示循环数据。那么小程序中怎么到呢。其实很简单,使用block就可以了。
下面我们先看下效果图:
这个布局其实很简单,大致分为3部分,上+下(左75%,右25%)。这里就不在细说了。那么这里要怎么写wxml呢。下面贴代码:
这边很清晰的可以看出
下面顺便介绍下数据格式处理(时间格式转化):
在实际场景中我们可能会需要将时间转化为几分钟前,几小时前,几天前等。那么我们数据库中存放的一般是datetime格式数据。我们需要转化处理。
处理时间的时候需要注意的是:ios和android上的时间格式不同。ios时间是以2018/04/01,所以需要先将时间格式转化为/格式。不然你的小程序时间转化只会对安卓生效哦。具体转化代码:
for (var i = 0; i < goodsList.length; i++) { var PublishDatetime = goodsList[i].PublishDatetime.replace(/([\d\-]+)T(\d+:\d+)\:.*/, "$1 $2");//将带T的时间格式转化掉. PublishDatetime = PublishDatetime.replace(/-/g, "/");// 将格式‘-'转化为‘/' //换算时间戳,计算得到与当前时间的差距 var minute = 1000 * 60; var hour = minute * 60; var day = hour * 24; var halfamonth = day * 15; var month = day * 30; var now = new Date().getTime(); var diffValue = now - new Date(PublishDatetime).getTime(); //console.log("diffValue:" + diffValue); if (diffValue < 0) { return; } var monthC = diffValue / month; var weekC = diffValue / (7 * day); var dayC = diffValue / day; var hourC = diffValue / hour; var minC = diffValue / minute; if (monthC >= 1) { if (monthC <= 12) goodsList[i].PublishDatetime = "" + parseInt(monthC) + "月前";//将时间替换掉想要的数据 else { goodsList[i].PublishDatetime = "" + parseInt(monthC / 12) + "年前";//将时间替换掉想要的数据 } } else if (weekC >= 1) { goodsList[i].PublishDatetime = "" + parseInt(weekC) + "周前";//将时间替换掉想要的数据 } else if (dayC >= 1) { goodsList[i].PublishDatetime = "" + parseInt(dayC) + "天前";//将时间替换掉想要的数据 } else if (hourC >= 1) { goodsList[i].PublishDatetime = "" + parseInt(hourC) + "小时前";//将时间替换掉想要的数据 } else if (minC >= 1) { goodsList[i].PublishDatetime = "" + parseInt(minC) + "分钟前";//将时间替换掉想要的数据 } else { goodsList[i].PublishDatetime = "刚刚";//将时间替换掉想要的数据 } } //最后将转化后的时间重新赋值给数据源
上面是我整理给大家的,希望今后会对大家有帮助。
相关文章:
AJAX +SpringMVC 实现bootstrap模态框的分页查询功能
The above is the detailed content of Tutorial on how to use WeChat mini program block. For more information, please follow other related articles on the PHP Chinese website!

JavaandJavaScriptaredistinctlanguages:Javaisusedforenterpriseandmobileapps,whileJavaScriptisforinteractivewebpages.1)Javaiscompiled,staticallytyped,andrunsonJVM.2)JavaScriptisinterpreted,dynamicallytyped,andrunsinbrowsersorNode.js.3)JavausesOOPwithcl

JavaScript 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.

JavaScriptusestwotypesofcomments:single-line(//)andmulti-line(//).1)Use//forquicknotesorsingle-lineexplanations.2)Use//forlongerexplanationsorcommentingoutblocksofcode.Commentsshouldexplainthe'why',notthe'what',andbeplacedabovetherelevantcodeforclari

The 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.

Whether 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 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.

JavaScriptisnotbuiltonCorC ;it'saninterpretedlanguagethatrunsonenginesoftenwritteninC .1)JavaScriptwasdesignedasalightweight,interpretedlanguageforwebbrowsers.2)EnginesevolvedfromsimpleinterpreterstoJITcompilers,typicallyinC ,improvingperformance.

JavaScript 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.


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

Zend Studio 13.0.1
Powerful PHP integrated development environment

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 English version
Recommended: Win version, supports code prompts!

SublimeText3 Chinese version
Chinese version, very easy to use

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
