Warning: Failed prop type: Invalid prop value of type number supplied to Textinput, expected string

版权声明：我写的你不能转载，但是你可以复制啊。复制记得加关注啊（迷之微笑）。 https://blog.csdn.net/quhongqiang/article/details/88837813

react-native 使用TextInput标签时会遇到这个警告：

Warning: Failed prop type: Invalid prop value of type number supplied to Textinput, expected string in Textinput (at Appointmentnumber is: 112) in Appointmentnumber(created by Context. Consumen)in withnavigation(Appointmentnumber)(created bySceneview

在道具中你传递的是数值，你必须以字符串的形式传递它，所以这样改进一下代码：

<TextInput
  style={styles.textinput}
  placeholder="站厅预约人数"
  placeholderTextColor = "#cccccc"
  keyboardType = "numeric"
  value={`${this.state.num}`} //这里改进一下就OK
  onChangeText={(num)=> {this.setState({num})}}
/>