每当我尝试运行我的iOS
模拟器时,我都会收到该错误。所有模块都已安装,我的图片的文件路径是正确的,除了我的模拟器中出现的错误外,我的IDE中没有错误。图片下面是错误。
这是Login.js
:
import React, {Component} from 'react';
import {StyleSheet, TextInput, Text, TouchableOpacity, KeyboardAvoidingView} from 'react-native';
class Login extends Component {
onButtonPress() {
this.props.navigator.push({
id: 'CreateAccount'
});
}
render() {
return(
<KeyboardAvoidingView behavior={"padding"} style={styles.container}>
<TextInput
style={styles.input}
returnKeyType={"next"}
keyboardType={"email-address"}
autoCorrect={false}
placeholder={"Email"}
/>
<TextInput
style={styles.input}
returnKeyType={"go"}
placeholder={"Password"}
secureTextEntry
/>
<TouchableOpacity>
<Text style={styles.loginAndCA}>Login</Text>
</TouchableOpacity>
<TouchableOpacity onPress={this.onButtonPress.bind(this)}>
<Text style={styles.loginAndCA}>Create Account</Text>
</TouchableOpacity>
</KeyboardAvoidingView>
);
}
}
const styles = StyleSheet.create({
container: {
padding: 20 // Length of text input boxes.
},
input: {
backgroundColor: '#DAE5FF',
padding: 20,
paddingHorizontal: 15,
marginBottom: 10,
borderRadius: 15
},
loginAndCA: {
fontSize: 40,
textAlign: 'center',
color: 'white',
fontFamily: 'Bodoni 72 Smallcaps',
paddingHorizontal: 10
}
});
export default Login;
这是BackGround.js
:
import React, {Component} from 'react';
import {StyleSheet, Image, View, Text} from 'react-native';
import Login from './Login';
class BackGround extends Component {
render() {
return(
<View style={styles.first}>
<Image style={styles.container} source={require('../pictures/smoke.jpg')}>
<View style={styles.second}>
<View>
<Text style={styles.title}>My App</Text>
</View>
<Login/>
</View>
</Image>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: 'center',
width: null,
height: null,
backgroundColor: 'rgba(0,0,0,0)'
},
first: {
flex: 1
},
second: {
paddingTop: 290 // Moves both <TextInput> boxes down.
},
title: {
fontSize: 34,
textAlign: 'center',
justifyContent: 'center',
flexDirection: 'row',
fontFamily: 'Bodoni 72'
}
// movementTitle: {
// paddingBottom: 34
// }
});
export default BackGround;
这是CreateAccount.js
:
import React, {Component} from 'react';
import {Text} from 'react-native';
class CreateAccount extends Component {
render() {
return(
<Text>Must get to this page</Text>
);
}
}
export default CreateAccount;
这是index.ios.js
:
import React, {Component} from 'react';
import {View, StyleSheet, AppRegistry} from 'react-native';
import {Navigator} from 'react-native-deprecated-custom-components';
import BackGround from './components/BackGround';
import Login from "./components/Login";
import CreateAccount from "./components/CreateAccount";
export default class App extends Component {
render() {
return(
<View style={styles.back}>
<BackGround/>
<Navigator
initialRoute={{id: 'Login'}}
renderScene={this.navigatorRenderScene}
/>
</View>
);
}
navigatorRenderScene() {
_navigator = navigator;
switch(route.id) {
case 'Login':
return (<Login navigator={navigator} title="Login"/>);
case 'CreateAccount':
return (<CreateAccount navigator={navigator} title="Create Account" />);
}
}
}
const styles = StyleSheet.create({
back: {
flex: 1
}
});
AppRegistry.registerComponent('dendroApp', () => dendroApp);
答案 0 :(得分:11)
React最近从React 15.5中删除了其核心库中的PropTypes。
添加行
import PropTypes from 'prop-types';
直接从中调用你的proptypes。
答案 1 :(得分:3)
似乎PropTypes未定义。我在代码中的任何地方都没有看到它。您必须通过单独的模块导入它,如文档PropTypes.
所示更新
您正在使用的库可能正在使用现已弃用/不支持的React.PropTypes。我建议使用更新的库或实际进入库并更新包,以便它使用来自单独包而不是React.PropTypes的新PropTypes。这应该可以解决您的问题
答案 2 :(得分:1)
是的,如果您升级反应:15或更高,那么您必须添加import PropTypes from 'prop-types';
但最近我在&#34;反应&#34;:&#34; 16.0.0-beta.5&#34;中遇到了同样的问题。我改变后
"dependencies": {
"react": "16.0.0-alpha.12"
},
"devDependencies": {
"react-test-renderer": "16.0.0-alpha.12"
}
然后它发现工作正常。希望它有所帮助!