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                1. <block/.>并不是一個組件,它僅僅是一個包裝元素,不會在頁面中做任何渲染,只接受控制屬性。 2. 因為?wx:if?是一個控制屬性,需要將它添加到一個標簽上。如果要一次性判斷多個組件標簽,可以使用一個?<block/>?標簽將多個組件包裝起來,并在上邊使用?wx:if?控制屬性。 ~~~?? ? ?? ?<block wx:if="{{true}}"> ?? ??? ??? ? <view> view1 </view> ?? ??? ??? ?<view> view2 </view> ?? ??? ?</block> ~~~ 3.類似?block wx:if,也可以將?wx:for?用在<block/>標簽上,以渲染一個包含多節點的結構塊。例如:? ~~~ ? ?<block wx:for="{{[1, 2, 3]}}"> ?? ?<view> {{index}}: </view> ?? ? <view> {{item}} </view> </block> ---------------------
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