我在这里问是因为我已经研究了这个问题,而且似乎找不到解决方案。我使用的是React Native Picker,但是默认情况下,该选择器在右上角没有带有“确认”按钮,供用户在选择项目时按下。我对React Native和移动开发非常陌生,因此,如果这是一个简单的问题,我深表歉意,但我对此深感困惑。有谁知道实现此按钮的解决方案?
import React, { Component } from 'react';
import { Picker, View, Text } from 'react-native';
class ProposalPicker extends Component {
state={proposal: ''}
updateProposal = (proposal) => {
this.setState({ proposal: proposal })
}
render() {
return (
<Picker selectedValue = {this.state.proposal}
onValueChange = {this.updateProposal}
itemStyle={{ backgroundColor: 'grey' }}
>
<Picker.Item label = "Test" value = "TestValue" />
<Picker.Item label = "Test" value = "TestValue" />
<Picker.Item label = "Test" value = "TestValue" />
<Picker.Item label = "Test" value = "TestValue" />
<Picker.Item label = "Test" value = "TestValue" />
<Picker.Item label = "Test" value = "TestValue" />
<Picker.Item label = "Test" value = "TestValue" />
<Picker.Item label = "Test" value = "TestValue" />
</Picker>
//<Text>{this.state.proposal}</Text>
)
}
}
const styles = {
proposalPickerStyle: {
backgroundColor: 'lightgrey'
}
}
export default ProposalPicker;
答案 0 :(得分:2)
添加新功能
handleConfirmClick(){
//perform confirm action
}
,然后在选择器下方添加一个新按钮
<button onClick={this.handleConfirmClick.bind(this)} >Confirm</button>
编辑刚刚注意到您使用ES(6?)
handleConfirmClick = () => {
//perform action
}
编辑2除非您希望此组件具有自己的生命周期,否则最好将Picker
放置在父组件中,并确认Button
和您的onChangeHandler