Cordoba Image Picker converts to base64

Question

I'm having trouble converting the image to the base64 format that was selected using ngCordova imagePicker .

To keep things simple, the code presented on the Cordoba website (which works) is as follows:

module.controller('ThisCtrl', function($scope, $cordovaImagePicker) {

  var options = {
   maximumImagesCount: 10,
   width: 800,
   height: 800,
   quality: 80
  };

  $cordovaImagePicker.getPictures(options)
    .then(function (results) {
     for (var i = 0; i < results.length; i++) {
    console.log('Image URI: ' + results[i]);
  }
}, function(error) {
  // error getting photos
});
});

An array of results returns an array of results, for example: file /// ... but how to convert from here? I need a function that you pass to a value (file) and returns a base64 string.

Here is the function that is trying to do this:

function convertImgToBase64URL(url, callback, outputFormat){

        var canvas = document.createElement('CANVAS'),
            ctx = canvas.getContext('2d'),
            img = new Image();
        img.crossOrigin = 'Anonymous';
        img.onload = function(){
            var dataURL;
            canvas.height = img.height;
            canvas.width = img.width;
            ctx.drawImage(img, 0, 0);
            dataURL = canvas.toDataURL(outputFormat);
            callback(dataURL);
            canvas = null; 
        };
        img.src = url;
    };

But how to integrate it into the code?

I tried this (you only need to select one image):

$cordovaImagePicker.getPictures(options)
                .then(function (results) {
                    convertImgToBase64URL(results[0], function(base64Img){

                        self.chosenImage = base64Img;                                
                    });                          

             }, function(error) {
                console.log(error);
             }); 

but self.chosenImage gets the value blank.

There may be a problem with asynchrony, but how best to solve it?

Answer 1

$cordovaCamera sourceType Camera.PictureSourceType.PHOTOLIBRARY?

document.addEventListener("deviceready", function () {

    var options = {
      quality: 50,
      destinationType: Camera.DestinationType.DATA_URL,
      sourceType: Camera.PictureSourceType.PHOTOLIBRARY,
      allowEdit: true,
      encodingType: Camera.EncodingType.JPEG,
      targetWidth: 100,
      targetHeight: 100,
      popoverOptions: CameraPopoverOptions,
      saveToPhotoAlbum: false
    };

    $cordovaCamera.getPicture(options).then(function(imageData) {
      var image = document.getElementById('myImage');
      image.src = "data:image/jpeg;base64," + imageData;
    }, function(err) {
      // error
    });

  }, false);

Answer 2

, ngCordova ImagePicker base64. ngCordova $cordovaCamera , .

 var options = {
  quality: 80,
  destinationType: Camera.DestinationType.DATA_URL,
  sourceType: Camera.PictureSourceType.CAMERA,
  allowEdit: true,
  encodingType: Camera.EncodingType.JPEG,
  targetWidth: 800,
  targetHeight: 800,
  popoverOptions: CameraPopoverOptions,
  saveToPhotoAlbum: false
};

: http://ngcordova.com/docs/plugins/camera/

Answer 3

, , , . , , , Base64 plugin.

cordova plugin add https://github.com/hazemhagrass/phonegap-base64

$cordovaImagePicker.getPictures

$cordovaImagePicker.getPictures(options)
        .then(function (results) {
            for (var i = 0; i < results.length; i++) {
                console.log('Image URI: ' + results[i]);
                $scope.imageUri = results[i];

               // Encode URI to Base64
               window.plugins.Base64.encodeFile($scope.imageUri, function(base64){
                  // Save images in Base64
                  $scope.images.push(base64);
               });
            }

        }, function(error) {
            // error getting photos
        });

Answer 4

If you just need to transfer the image for display, you will not. You can use fileTransferPlugin. Hope this helps you.