反应原生的TextInput焦点样式

在React Native中,textInput当你获得焦点时,你如何改变它的风格？说我有类似的东西

class MyInput extends Component {
    render () {
        return ;
    }
};

const stylesObj = {
    textInput: {
        height: 50,
        fontSize: 15,
        backgroundColor: 'yellow',
        color: 'black',
    }
};
const styles = StyleSheet.create(stylesObj);

我想改变焦点的背景颜色green.

这篇文档让我相信解决方案是这样的

class MyInput extends Component {
    constructor (props) {
        super(props);
        this.state = {hasFocus: false};
    }

    render () {
        return ();
    }

    setFocus (hasFocus) {
        this.setState({hasFocus});
    }
};

const stylesObj = {
    textInput: {
        height: 50,
        fontSize: 15,
        backgroundColor: 'yellow',
        color: 'black',
    }
};
const styles = StyleSheet.create({
    ...stylesObj,
    focusedTextInput: {
        ...stylesObj,
        backgroundColor: 'green',
    }
});

忽略样式结构中的潜在错误,这会被认为是处理它的正确方法吗？这对我来说似乎非常冗长.

您可以通过传入onFocus和onBlur事件来实现这一点,以便在聚焦和模糊时设置和取消设置样式:

  onFocus() {
    this.setState({
        backgroundColor: 'green'
    })
  },

  onBlur() {
    this.setState({
      backgroundColor: '#ededed'
    })
  },

然后,在TextInput中执行以下操作:

 this.onBlur() }
    onFocus={ () => this.onFocus() }
    style={{ height:60, backgroundColor: this.state.backgroundColor, color: this.state.color }}  />

我已经建立了一个完整的工作项目在这里.我希望这有帮助!

https://rnplay.org/apps/hYrKmQ

'use strict';

var React = require('react-native');
var {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  TextInput
} = React;

var SampleApp = React.createClass({

  getInitialState() {
    return {
        backgroundColor: '#ededed',
      color: 'white'
    }
  },

  onFocus() {
        this.setState({
        backgroundColor: 'green'
    })
  },

  onBlur() {
    this.setState({
      backgroundColor: '#ededed'
    })
  },

  render: function() {
    return (
      
        this.onBlur() }
        onFocus={ () => this.onFocus() }
        style={{ height:60, backgroundColor: this.state.backgroundColor, color: this.state.color }}  />
      
    );
  }
});

var styles = StyleSheet.create({
  container: {
    flex: 1,
    marginTop:60
  }
});

AppRegistry.registerComponent('SampleApp', () => SampleApp);