我也遇到这个问题 借鉴一下别人的
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
image.png
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})}}
/>
原文链接：https://blog.csdn.net/quhongqiang/article/details/88837813
