ImageSource.saveToFile does not work with format 'jpg'

Tell us about the problem

Trying to write an ImageSource to a file does not work on iOS when specifying ‘jpg’ as format (‘jpeg’ works fine).

Which platform(s) does your issue occur on?

iOS simulator (waiting for apple to approve my dev account to be able to deploy/test to real iOS device)

Please provide the following version numbers that your issue occurs with:

$ tns info
All NativeScript components versions information
┌──────────────────┬─────────────────┬────────────────┬─────────────┐
│ Component        │ Current version │ Latest version │ Information │
│ nativescript     │ 3.2.1           │ 3.2.1          │ Up to date  │
│ tns-core-modules │ 3.2.0           │ 3.2.0          │ Up to date  │
│ tns-android      │ 3.2.0           │ 3.2.0          │ Up to date  │
│ tns-ios          │ 3.2.0           │ 3.2.0          │ Up to date  │
└──────────────────┴─────────────────┴────────────────┴─────────────┘

Is there code involved? If so, please share the minimal amount of code needed to recreate the problem.

const targetFilename = 'test.jpg';
const tempPath = fs.knownFolders.temp().path;
const localFullPath = fs.path.join(tempPath, targetFilename);
let saved = imageSrc.saveToFile(localFullPath, 'jpeg'); // format 'jpg' does NOT work on iOS!

[gepisolo]

The code seems to be identical but it’s not 😃

In the first solution I use source.saveToFile() and source is the reference to ImageSource used to load image by .fromAsset() method (and works on android returning TRUE). In the second solution I use result.saveToFile() and result is the reference to a new ImageSource returned by the Promise.

What works on ANDROID (commented):

      const source = new imageSource.ImageSource(); // New instance of IMAGESOURCE
      source.fromAsset(picture).then((result) => { 
        const saved = source.saveToFile(path, "png"); // <= use **source**.saveToFile
        console.log(saved); //True on ANDROID but false on IOS
      });

What works on iOs (not tested on Android):

     const source = new imageSource.ImageSource();
      source.fromAsset(picture).then((result) => {
        
        const saved = result.saveToFile(path, "png"); // <= use the result which is returned by the Promise 
        console.log(saved); //True on IOS - not tested on android
      });

[abhayastudios]

@tsonevn I am actually using the Angular 2 version, but even your example doesn’t work for me. After tapping I don’t see any image, and also changing these lines below in main-page.ts, will print CONSOLE LOG file:///app/main-page.js:45:16: saved: false

var saved = imagesourcetest.saveToFile(localFullPath, "jpg");
console.log(`saved: ${saved}`);

I am testing on iOS simulator Version 10.0 (SimulatorApp-745.10).