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。
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