Question

导入一个文件时遇到问题。这是我的“门票”文件。我将其导出到下面将发布给您的代码中。然后，我将其导入到导航文件中，但是出现错误...所有其他导入均有效。我知道我犯了一个错误，但是找不到。您可以在我的屏幕截图中看到树形结构...

非常感谢您的帮助或指导。

import React, { Component } from 'react';
import { Text, TouchableOpacity, AppRegistry, View } from 'react-native';
import { RNCamera } from 'react-native-camera';
import styles from '../../../assets/styles';

export default class Tickets extends Component {
  render() {
    return (
      <View style={styles.container}>
        <RNCamera
          ref={ref => {
            this.camera = ref;
          }}
          style={styles.preview}
          type={RNCamera.Constants.Type.back}
          flashMode={RNCamera.Constants.FlashMode.on}
          androidCameraPermissionOptions={{
            title: 'Permission to use camera',
            message: 'We need your permission to use your camera',
            buttonPositive: 'Ok',
            buttonNegative: 'Cancel',
          }}
          androidRecordAudioPermissionOptions={{
            title: 'Permission to use audio recording',
            message: 'We need your permission to use your audio',
            buttonPositive: 'Ok',
            buttonNegative: 'Cancel',
          }}
          onGoogleVisionBarcodesDetected={({ barcodes }) => {
            console.log(barcodes);
          }}
        />
        <View style={{ flex: 0, flexDirection: 'row', justifyContent: 'center' }}>
          <TouchableOpacity onPress={this.takePicture.bind(this)} style={styles.capture}>
            <Text style={{ fontSize: 14 }}> SNAP </Text>
          </TouchableOpacity>
        </View>
      </View>
    );
  }

  takePicture = async () => {
    if (this.camera) {
      const options = { quality: 0.5, base64: true };
      const data = await this.camera.takePictureAsync(options);
      console.log(data.uri);
    }
  };
}
AppRegistry.registerComponent('Tickets', () => Tickets);

Answer 1

我不知道为什么，但是这样：它有效：（PureComponent ??）

import React, { PureComponent } from 'react';
import { Text, TouchableOpacity, View } from 'react-native';
import { RNCamera } from 'react-native-camera';
import styles from '../../../assets/styles';

export default class Tickets extends PureComponent {
  render() {
    return (
      <View style={styles.container}>
        <RNCamera
          ref={ref => {
            this.camera = ref;
          }}
          style={styles.preview}
          type={RNCamera.Constants.Type.back}
          flashMode={RNCamera.Constants.FlashMode.on}
          androidCameraPermissionOptions={{
            title: 'Permission to use camera',
            message: 'We need your permission to use your camera',
            buttonPositive: 'Ok',
            buttonNegative: 'Cancel',
          }}
          androidRecordAudioPermissionOptions={{
            title: 'Permission to use audio recording',
            message: 'We need your permission to use your audio',
            buttonPositive: 'Ok',
            buttonNegative: 'Cancel',
          }}
          onGoogleVisionBarcodesDetected={({ barcodes }) => {
            console.log(barcodes);
          }}
        />
        <View style={{ flex: 0, flexDirection: 'row', justifyContent: 'center' }}>
          <TouchableOpacity onPress={this.takePicture.bind(this)} style={styles.capture}>
            <Text style={{ fontSize: 14 }}> SNAP </Text>
          </TouchableOpacity>
        </View>
      </View>
    );
  }

  takePicture = async () => {
    if (this.camera) {
      const options = { quality: 0.5, base64: true };
      const data = await this.camera.takePictureAsync(options);
      console.log(data.uri);
    }
  };
}

反应本机如何正确导入文件？

1 个答案: