最近开始学习ReactNative，遇到了一些坑，总结一下方便以后查找。

1、react.children.only expected to receive a single react element child

TabNavigator.Item的时候出现了如上的错误，TabNavigator.Item必须包含一个子组件(不能超过也不能没有),报错之前代码如下:

<TabNavigator.Item
                title="xxxxx"
                renderIcon={() => <Image source={{uri: 'yyyyy'}} style={styles.iconStyle}/>}
                renderSelectedIcon={() =><Image source={{uri: 'zzzzz'}} style={styles.iconStyle}/>} 
            >
            </TabNavigator.Item>

此时会报错，添加子组件即可:

<TabNavigator.Item
                title="xxxxx"  
                renderIcon={() => <Image source={{uri: 'yyyyy'}} style={styles.iconStyle}/>}
                renderSelectedIcon={() =><Image source={{uri: 'zzzzz'}} style={styles.iconStyle}/>} 
            >
            <View >
                <Text>xxxx</Text>
            </View >
                TabNavigator.Item>

2、Navigator is deprecated and has been removed from this package. It can now be installed and imported from react-native-deprecated-custom-components

从0.44版本开始，Navigator不再从‘react-native’中引入

解决办法：
1、使用终端打开对应的目录 cd 路径
2、

npm i react-native-deprecated-custom-components --save

3、在对应的文件种将组件引入

import {Navigator} from 'react-native-deprecated-custom-components';