Detailed explanation of practical cases of using block
这次给大家带来block使用实战案例详解,block使用的注意事项有哪些,下面就是实战案例,一起来看一下。
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 = 1) { if (monthC = 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
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