<scroll-view scroll-y bindscroll="scroll" bindscrolltolower="toLower">
<block wx:for="{{arr}}" wx:key="index" wx:if="{{index<currentIndex*10}}" >
 </block>
</scroll-view>


js:
toLower(){
	let currentIndex = this.data.currentIndex + 1
	this.setData({
	currentIndex 
	})
}
	
 

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