我们现在有钩子，所以我建议重新格式化。使用钩子打开/关闭组件。

const [modalVisible, setModalVisible] = setState(false);

然后有一个按钮

<Button title="Press Me" onPress={() => {
   setModalVisible(true);
}}

然后，在return语句中

return(
<View>
    {modalVisible &&
   Insert modal code in here.
}
</View>
)

我也有同样的问题，我想要显示/隐藏视图，但我真的不希望UI在添加/删除东西或必须处理重新渲染时跳来跳去。

我写了一个简单的组件来处理它。默认为动画，但易于切换。我把它放在GitHub和NPM上，但所有的代码都在下面。

NPM install——save react-native- hidden -view

import React, { Component, PropTypes } from 'react';
import { Animated  } from 'react-native';

class HideableView extends Component {
  constructor(props) {
    super(props);
    this.state = {
      opacity: new Animated.Value(this.props.visible ? 1 : 0)
    }
  }

  animate(show) {
    const duration = this.props.duration ? parseInt(this.props.duration) : 500;
    Animated.timing(
      this.state.opacity, {
        toValue: show ? 1 : 0,
        duration: !this.props.noAnimation ? duration : 0
      }
    ).start();
  }

  shouldComponentUpdate(nextProps) {
    return this.props.visible !== nextProps.visible;
  }

  componentWillUpdate(nextProps, nextState) {
    if (this.props.visible !== nextProps.visible) {
      this.animate(nextProps.visible);
    }
  }

  render() {
    if (this.props.removeWhenHidden) {
      return (this.visible && this.props.children);
    }
    return (
      <Animated.View style={{opacity: this.state.opacity}}>
        {this.props.children}
      </Animated.View>
    )
  }
}

HideableView.propTypes = {
  visible: PropTypes.bool.isRequired,
  duration: PropTypes.number,
  removeWhenHidden: PropTypes.bool,
  noAnimation: PropTypes.bool
}

export default HideableView;

下面的例子是用Hooks在typescript中编码。

import React, { useState, useEffect } from "react";

........

const App = () => {

   const [showScrollView, setShowScrollView] = useState(false);

   ......

   const onPress = () => {
    // toggle true or false
    setShowScrollView(!showScrollView);
  }

  ......

      </MapboxGL.ShapeSource>
        <View>{showScrollView ? (<DetailsScrollView />) : null}</View>
      </MapboxGL.MapView>
  ......

}

如果你不想从你的页面中删除组件，比如隐藏一个WebView，我可以保证使用opaque方法。

<WebView
   style={{opacity: 0}} // Hide component
   source={{uri: 'https://www.google.com/'}}
 />

如果你需要向第三方网站提交表单，这是很有用的。

constructor(props) {
    super(props);
    this.state = {
      visible: true,
}
}

声明visible为false，默认情况下模式/视图是隐藏的

示例= ()=> {

 this.setState({ visible: !this.state.visible })

}

函数调用**

{this.state.visible == false ?
        <View>
            <TouchableOpacity
              onPress= {() => this.example()}>   // call function
                          <Text>
                            show view
                          </Text>
            </TouchableOpacity>

</View>
:
 <View>
    <TouchableOpacity
              onPress= {() => this.example()}>
                          <Text>
                            hide view
                          </Text>
            </TouchableOpacity>
</View> 
 }

隐藏并显示活动指示器的父视图

constructor(props) {
  super(props)

  this.state = {
    isHidden: false
  }  
} 

像跟着一样隐藏和显示

{
   this.state.isHidden ?  <View style={style.activityContainer} hide={false}><ActivityIndicator size="small" color="#00ff00" animating={true}/></View> : null
}

全部参考

render() {
    return (
       <View style={style.mainViewStyle}>
          <View style={style.signinStyle}>
           <TextField placeholder='First Name' keyboardType='default' onChangeFirstName={(text) => this.setState({firstName: text.text})}/>
           <TextField placeholder='Last Name' keyboardType='default' onChangeFirstName={(text) => this.setState({lastName: text.text})}/>
           <TextField placeholder='Email' keyboardType='email-address' onChangeFirstName={(text) => this.setState({email: text.text})}/>
           <TextField placeholder='Phone Number' keyboardType='phone-pad' onChangeFirstName={(text) => this.setState({phone: text.text})}/>
           <TextField placeholder='Password' secureTextEntry={true} keyboardType='default' onChangeFirstName={(text) => this.setState({password: text.text})}/>
           <Button  style={AppStyleSheet.buttonStyle} title='Sign up' onPress={() => this.onSignupPress()} color='red' backgroundColor='black'/>
          </View>
          {
            this.state.isHidden ?  <View style={style.activityContainer}><ActivityIndicator size="small" color="#00ff00" animating={true}/></View> : null
          }
      </View>
   );
}

在按钮上按下设置状态如下所示

onSignupPress() {
  this.setState({isHidden: true})
}

当你需要躲藏的时候

this.setState({isHidden: false})