问题描述
有没有办法让条码扫描器检查我本地数据库中的条码号?我一直在尝试在 google 上进行一些搜索,但没有此类教程。
import DataBase from '../Data/DataBase';
class BarCodeReader extends Component {
constructor(props) {
super(props);
this.camera = null;
this.barcodeCodes = [];
this.state = {
camera: {
type: RNCamera.Constants.Type.back,flashMode: RNCamera.Constants.FlashMode.auto,},};
}
onBarCodeRead(scanResult) {
if (scanResult.data != null) {
if (!this.barcodeCodes.includes(scanResult.data)) {
this.barcodeCodes.push(scanResult.data);
alert(scanResult.data);
}
}
return;
}
render() {
return (
<View style={styles.container}>
<RNCamera
ref={(ref) => {
this.camera = ref;
}}}
onBarCodeRead={this.onBarCodeRead.bind(this)}
/>
</View>
);
}
}
const DataBase = [
{
name: 'text',company: 'text',extra: '7 310350 118670',];
export default DataBase;
解决方法
import codes from '../Data/codes';
class BarCodeReader extends Component {
constructor(props) {
super(props);
this.camera = null;
this.barcodeCodes = [];
this.state = {
camera: {
type: RNCamera.Constants.Type.back,flashMode: RNCamera.Constants.FlashMode.auto,},};
}
validateCode(scanResult){
const codeData = codes.find(codeMetadata => {
return codeMetadata.id === scanResult.data
})
if(codeData){
alert("code valid" + codeData)
} else {
alert("code not found")
}
}
onBarCodeRead(scanResult) {
if (scanResult.data != null) {
if (!this.barcodeCodes.includes(scanResult.data)) {
this.barcodeCodes.push(scanResult);
this.validateCode(scanResult)
}
}
return;
}
render() {
return (
<View style={styles.container}>
<RNCamera
ref={(ref) => {
this.camera = ref;
}}}
onBarCodeRead={this.onBarCodeRead.bind(this)}
/>
</View>
);
}
}
const codes = [
{
id: "code-id-text"
name: 'text',company: 'text',extra: '7 310350 118670',