全屏背景图

app.wxss (设置整个页面的布局)

page{
  height: 100%;
  width: 100%;
}

page.wxss

.con {
  height: 100%;
  background-color: #F0F2F5;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-sizing: border-box;
  background-image: url('https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1529498357452&di=5da189bde8abd791b19870c5c61754d4&imgtype=0&src=http%3A%2F%2Fimg4q.duitang.com%2Fuploads%2Fitem%2F201411%2F27%2F20141127144551_CxUr4.jpeg'); (只支持网络图片)
}

page.wxml

<view style='con'></view>

text自动换行

.textView {
width: 100%;
word-break: keep-all;
word-wrap: break-word
}