react-native - 显示键盘 react 原生时隐藏底部 ImageView

Question

怎么隐藏这张图。。。
感谢您的任何帮助!

Answer 1

您可以使用 Keyboard在 ReactNative 中监听键盘的变化并在键盘可见时隐藏您的图像。

检查下面的示例代码

import * as React from "react";
import { View, Keyboard, TextInput, Image } from "react-native";

export default class App extends React.Component {
  state = {
    isKeyboadVisible: false,
    text: ""
  };

  componentDidMount() {
    this.keyboardDidShowListener = Keyboard.addListener(
      "keyboardDidShow",
      this._keyboardDidShow
    );
    this.keyboardDidHideListener = Keyboard.addListener(
      "keyboardDidHide",
      this._keyboardDidHide
    );
  }

  componentWillUnmount() {
    this.keyboardDidShowListener.remove();
    this.keyboardDidHideListener.remove();
  }

  _keyboardDidShow = () => {
    this.setState({
      isKeyboadVisible: true
    });
  };

  _keyboardDidHide = () => {
    this.setState({
      isKeyboadVisible: false
    });
  };

  render() {
    return (
      <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
        <TextInput
          style={{
            height: 40,
            width: "80%",
            borderColor: "red",
            borderWidth: 1,
            marginBottom: 10
          }}
          onChangeText={text => this.setState({ text })}
          value={this.state.text}
        />
        {!this.state.isKeyboadVisible && (
          <Image
            style={{ width: 100, height: 100 }}
            source={{ uri: "https://reactnative.dev/img/tiny_logo.png" }}
          />
        )}
      </View>
    );
  }
}

根据您的要求更改上述代码。

希望这对你有帮助。如有疑问，请放心。