我遇到了问题中的错误，当我尝试设计我的应用程序以调用 native.camera 时，我在 ionic 3 项目中看到了我的控制台，我看到了这个错误:

Native:尝试调用 Camera.getPicture，但 Cordova 不可用。确保包含 cordova.js 或在设备/模拟器中运行。

这是我用来调用原生相机的代码。

这是我的 problem.html 中的代码

 <button class="logoCamera" ion-button (click)="presentActionSheet()">
    <ion-icon name="camera" ></ion-icon>

这是我problem.ts中的代码

import { File } from '@ionic-native/file';
import { Transfer, TransferObject} from '@ionic-native/transfer';
import { FilePath } from '@ionic-native/file-path';
import { Camera } from '@ionic-native/camera';

public presentActionSheet(){
let actionSheet = this.actionSheetCtrl.create({
  title: 'Select Image',
  buttons: [
    {
      text: 'Load from Library',
      handler: () => {
        this.takePicture(this.camera.PictureSourceType.PHOTOLIBRARY);
      }
    },
    {
      text: 'Use Camera',
      handler: () => {
        this.takePicture(this.camera.PictureSourceType.CAMERA);
      }
    },
    {
      text: 'Cancel',
      role: 'cancel'
    }
  ]
});
actionSheet.present();
}

public takePicture(sourceType){
//Create option for the Camera dialog
var options = {
  quality: 100,
  sourceType : sourceType,
  saveToPhotoAlbum: false,
  correctOrientation: true
};

//Get the data of an image
this.camera.getPicture(options).then((imagePath) => {
  //special handling for android lib
  if(this.platform.is('android') && sourceType === this.camera.PictureSourceType.PHOTOLIBRARY) {
    this.filePath.resolveNativePath(imagePath)
      .then(filePath => {
        let correctPath = filePath.substr(0, filePath.lastIndexOf('/') + 1 );
        let currentName = imagePath.substring(imagePath.lastIndexOf('/') + 1, imagePath.lastIndexOf('?'));
        this.copyFileToLocalDir(correctPath, currentName, this.createFileName());
      });
  } else {
    var currentName = imagePath.substr(imagePath.lastIndexOf('/') + 1);
    var correctPath = imagePath.substr(0, imagePath.lastIndexOf('/')+ 1);
    this.copyFileToLocalDir(correctPath, currentName, this.createFileName());
  }
}, (err) => {
  this.presentToast('Error while selecting Image.');
});
}

       //Create a new name for image
      private createFileName() {
        var d = new Date(),
        n = d.getTime(),
        newFileName = n + ".jpg";
        return newFileName;
      }

      //copy image to local folder
      private copyFileToLocalDir(namePath, currentName, newFileName) {
        this.file.copyFile(namePath, currentName, cordova.file.dataDirectory, newFileName).then(success => {
          this.lastImage = newFileName;
        }, error => {
          this.presentToast('Error while storing file.');
        });
      }

    private presentToast(text) {
      let toast = this.toastCtrl.create({
        message: text,
        duration: 3000,
        position: 'middle'
      });
      toast.present();
    }

    public pathForImage(img){
      if (img === null) {
        return '';
      } else {
        return cordova.file.dataDirectory + img;
      }
    }

    public uploadImage() {
      //destination URL
      var url = "";

      //file to upload 
      var targetPath = this.pathForImage(this.lastImage);

      //file name only
      var filename = this.lastImage;

      var options = {
        fileKey: "file",
        fileName: filename,
        chunkedMode: false,
        mimeType: "multipart/form-data",
        params: {'fileName': filename}
      };

      const fileTransfer: TransferObject = this.transfer.create();

      this.loading = this.loadingCtrl.create({
        content: 'Uploading...',
      });
      this.loading.present();

      //use FileTransfer to upload image
      fileTransfer.upload(targetPath, url, options).then(data => {
        this.loading.dismissAll()
        this.presentToast('Image successful uploaded.');
      }, err => {
        this.loading.dismissAll()
        this.presentToast('Error while uploading file.');
      });
    }

当我运行 ionic serve 时，一切都很顺利，没有错误，什么也没有。

但是当我点击我的按钮访问natve camera时，出现错误，请帮我找出问题所在，我查了很多网站，都没有解决我的问题。

在我尝试运行 ionic cordova run ios --simulator 之后，出现了错误，但我很确定在运行此命令之前此错误不存在。

我可以知道如何解决这个问题吗？？

最佳答案

这里的错误信息非常准确:

Native : tried calling Camera.getPicture, but Cordova is not available. Make sure to include cordova.js or run in a device / simulator.

运行 ionic serve 不包括 cordova.js，也不在模拟器或设备上运行您的应用程序，这就是您收到错误的原因。您可以通过在设备或模拟器上运行您的应用程序来修复它:

ionic cordova run android/ios --device/--simulator

或者通过添加浏览器平台:

cordova platform add browser

并运行浏览器平台:

ionic cordova run browser

关于android - Ionic 3 在运行 ionic cordova add platform android 后，我的 ionic-native/file,filepath,transfer 发生错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47029173/