所以我有一个Button组件
import React, { Component } from 'react';
import { View, Text, TouchableNativeFeedback } from 'react-native';
class Button extends Component {
generateComponent() {
const { buttonStyle, textStyle } = this.styles;
const { text } = this.props;
switch (this.props.platform) {
case 'android':
return (
<TouchableNativeFeedback onPress={this.props.onPress}>
<View style={buttonStyle}>
<Text style={textStyle}>{text}</Text>
</View>
</TouchableNativeFeedback>
);
case 'ios':
return 0;
}
}
render() {
return (
<View>
{ this.generateComponent() }
</View>
);
}
styles = {
buttonStyle: {
borderRadius: 100,
justifyContent: 'center',
height: parseInt(this.props.size, 10),
width: parseInt(this.props.size, 10),
backgroundColor: this.props.color,
elevation: 3
},
textStyle: {
fontWeight: 'bold',
fontSize: parseInt(this.props.fontSize, 10),
lineHeight: parseInt(this.props.fontSize, 10)
+ Math.floor(parseInt(this.props.fontSize, 10) / 10) + 1,
color: this.props.fontColor,
textAlign: 'center'
}
}
}
Button.propTypes = {
text: React.PropTypes.string.isRequired,
platform: React.PropTypes.string.isRequired,
size: React.PropTypes.string.isRequired,
color: React.PropTypes.string.isRequired,
fontColor: React.PropTypes.string.isRequired,
fontSize: React.PropTypes.string.isRequired,
onPress: React.PropTypes.function.isRequired
};
export default Button;
我将此组件称为“组件首页”
import React, { Component } from 'react';
import { View } from 'react-native';
import Metas from '../components/Metas';
import Button from '../components/Button';
export default class Home extends Component {
constructor(props) {
super(props);
this.state = { metas: ['Meta 1', 'Meta 2', 'Meta 3'] };
}
render() {
return (
<View>
<Metas data={ this.state.metas } />
<Button
text="+"
platform={ this.props.platform }
onPress={ this._handleButtonPress }
size='50'
fontSize='25'
color='#FFD600'
fontColor='white'
/>
</View>
);
}
_handleButtonPress() {
console.log("Hello!");
}
}
Home.propTypes = {
platform: React.PropTypes.string.isRequired
};
问题是,如果我包含PropType,则会收到一条错误消息,指出onPress属性未定义。
我不明白为什么收到此错误。我用控制台记录了typeof onPress并打印功能。
有什么建议吗?
最佳答案
2017年9月更新
从React 15.5起,PropTypes已移到它自己的库中。像这样使用它:
import PropTypes from 'prop-types';
class Example extends React.Component {
render() {
return (
<h1>{this.props.test}</h1>
);
}
}
Example.propTypes = {
test: PropTypes.string
};
资料来源:https://facebook.github.io/react/docs/typechecking-with-proptypes.html
关于javascript - _react2.default.PropTypes.function未定义,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/42542540/