react native 踩坑记录

• Warning: Failed child context type: Invalid child context virtualizedCell.cellKey of type number supplied to CellRenderer, expected string.
  in CellRenderer (at VirtualizedList.js:851)
  in RCTView (at ScrollView.js:1063)
  解决方法：

将keyExtractor = (item, index) => index转为keyExtractor = {(item, index) => index.toString()}

image.png

• 问题：
  Image的!!!重大变革：
  Error: The <Image> component cannot contain children. If you want to render content on top of the image, consider using the <ImageBackground> component or absolute positioning.
  解决办法：

用ImageBackground 代替 Image

-问题：
Text strings must be rendered within a <Text> component.
原因：是因为多了两个‘’

image.png

解决办法：
去掉就可以了！！坑啊

image.png

• 问题：
  黄色警告
  例如：Remote debugger is in a background tab which may cause apps to perform slowly. Fix this by foregrounding the tab (or opening it in a separate window).

解决办法：

去掉黄色警告：
在index.js 添加
console.ignoredYellowBox = ['Warning: BackAndroid is deprecated. Please use BackHandler instead.','source.uri should not be an empty string','Invalid props.style key'];
console.disableYellowBox = true // 关闭全部黄色警告

• 问题：
  Native module cannot be bull.

  
  问题
  

  解决办法：
  相关包内容没有安装好，重新安装