fix: 修复RN中Image组件的mode为widthFix时图片首次加载可能不显示的问题,修复ScrollView在设置了scrollTop后滚动抖动的问题 #6036
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这个 PR 做了什么? (简要描述所做更改)
调整Image中this.state.ratio的更新条件,防止onLayout触发在componentDidMount之前,导致图片高度为0
修改ScrollView中getSnapshotBeforeUpdate的判断条件
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