React native 在react native中启动Perview失败的摄像头

我有一个扫描二维码的组件。这是我的代码：

import QRCodeScanner from 'react-native-qrcode-scanner';
.
.
.
<QRCodeScanner
cameraType={'front'}
onRead={this.onSuccess.bind(this)} />
.
.
.
onSuccess(e) {
console.warn(e.data);
}

从'react native qrcode scanner'导入QRCodeScanner'；
.
.
.
.
.
.
成功（e）{
控制台。警告（如数据）；
}

这是我的plist和androidmanifest.xml：

<key>NSCameraUsageDescription</key>
<string>Your message to user when the camera is accessed for the first                     
time</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>Your message to user when the photo library is accessed for the    
first time</string>
<key>NSMicrophoneUsageDescription</key>
<string>Your message to user when the microsphone is accessed for the 
first time</string>

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.READ_CONTACTS"/>
    <uses-permission android:name="android.permission.WRITE_CONTACTS"/>
    <uses-permission android:name="android.permission.VIBRATE"/>

 <uses-permission android:name="android.permission.CAMERA" />   <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="26" />

</manifest>

NSCameraUsageDescription
首次访问相机时向用户发送的消息
时间
NSPhotoLibraryUsageDescription
在访问照片库时向用户发送的消息
第一次
NSM话筒用途说明
在访问Microphone时向用户发送的消息
第一次

androidmanifest.xml：

<key>NSCameraUsageDescription</key>
<string>Your message to user when the camera is accessed for the first                     
time</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>Your message to user when the photo library is accessed for the    
first time</string>
<key>NSMicrophoneUsageDescription</key>
<string>Your message to user when the microsphone is accessed for the 
first time</string>

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.READ_CONTACTS"/>
    <uses-permission android:name="android.permission.WRITE_CONTACTS"/>
    <uses-permission android:name="android.permission.VIBRATE"/>

 <uses-permission android:name="android.permission.CAMERA" />   <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="26" />

</manifest>

但我收到这个错误：启动预览失败的相机

我如何解决这个问题

---

谢谢，advance

您为iOS和Android平台设置了配置吗？似乎您没有设置info.plist和AndroidManifest.xml。是的，我设置了。但我不知道是什么！你能在这里发布info.plist和androidmanifest.xml吗？你可以在ios和android文件夹中找到它们。是的，我可以。我已将其添加到帖子中。它不是您的info.plist文件。：）仅说明如何为qr扫描仪配置iOS端