Utilizing $ImageCacheFactory to preload all images

After creating a mobile application using the ionic framework with multiple images, I encountered an issue of flickering while loading them. To tackle this problem, I utilized $ImageCacheFactory for preloading all images as described in a helpful blog post.

The code snippet used involved individually referring to each of the 100 png images, which became quite cumbersome.

.run(function($ImageCacheFactory) {
    $ImageCacheFactory.Cache([
        "img/user.png", 
        "img/profile.png",
        "img/logo.png",
        "img/splash.png", 
        "img/map.png", 
        "img/shop.png",
        "img/country.png", 
        "img/place.png"
      ]).then(function(){
         console.log("Images done loading!");
      },function(failed){
          console.log("Error..!!!");
    });
})

Is there a more efficient way to reference all the png images in one line of code, considering they are located in the www/img folder? Thank you!

Answer №1

Below is an example of creating an Angular factory:

.factory("$fileFactory", function($q) {

  var File = function() {};

  File.prototype = {

    getEntries: function(path) {
      var deferred = $q.defer();
      window.resolveLocalFileSystemURI(path, function(fileSystem) {
        var directoryReader = fileSystem.createReader();
        directoryReader.readEntries(function(entries) {
          deferred.resolve(entries);
        }, function(error) {
          deferred.reject(error);
        });
      }, function(error) {
        deferred.reject(error);
      });
      return deferred.promise;
    }

  };

  return File;

});

To retrieve a list of all files using getEntries():

.run(function($ImageCacheFactory, $ionicPlatform, $fileFactory ) {
  var fs = new $fileFactory();
  $ionicPlatform.ready(function() {
    fs.getEntries('img').then(function(result) {
      var files = result;
      files = files.unshift({
        name: "[parent]"
      }).map(function(i, v) {
        return 'img/' + v.name;
      });
      $ImageCacheFactory.Cache(files).then(function() {
        console.log("Images done loading!");
      }, function(failed) {
        console.log("Error..!!!");
      });
    })
  });
});

Make sure to install the required dependencies from Apache Cordova File

cordova plugin add https://git-wip-us.apache.org/repos/asf/cordova-plugin-file.git

For more guidance, refer to this useful tutorial

Answer №2

Apologies for not having a definitive answer at this time, but I do understand why the issue is occurring.

Opting for a Web Browser

Avoid it. Trying to access this project through a web browser will only lead to disappointment. This application relies on specialized device plugins that may not be compatible with web browsers, resulting in anomalies and potential errors.

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