NativeScript / NativeScript/plugins
[imagepicker] IOS - Uncaught Error: The file *** couldn't be opened.
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Description
Issue: Every once in a while the following error occurs when selecting an image with the image picker.
This mostly happens "the first time" a picure is selected after opening the app. Following the exact same steps most times the imagepicker works as expected without throwing the error. It only occurs sometimes without any changes to the code, process, etc. Sentry tells it happens more often. The issue happens on IOs 16.4, and 17.1, and probally other versions.
Log:
on device 9B1D4E42-9CE9-452E-B84F-EE40C6D438F4.
Error while parsing debug response object. Error: BINDINGS: string value expected
authorizing...
***** Fatal JavaScript exception - application has been terminated. *****
NativeScript encountered a fatal error: Uncaught Error: The file ‚ *** couldnt' be opened.
at
_loop_2(file: src/webpack:/groeigids/node_modules/@nativescript/imagepicker/index.ios.js:142:0)
at (file: src/webpack:/groeigids/node_modules/@nativescript/imagepicker/index.ios.js:152:0)
at timer(file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:2561:0)
at invokeTask(file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:406:0)
at runTask(file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:178:0)
at invokeTask(file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:487:0)
at ZoneTask.invoke(file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:476:0)
at data.args.(file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:2541:0)
at invoke(file: src/webpack:/groeigids/node_modules/@nativescript/core/timer/index.ios.js:54:0)
at invoke(file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:372:0)
at runGuarded(file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:144:0)
at (file: src/webpack:/groeigids/node_modules/zone.js/fesm2015/zone.js:128:0)
at TimerTargetImpl.tick(file: src/webpack:/groeigids/node_modules/@nativescript/core/timer/index.ios.js:18:0)
Code and setup:
public pickImage(options?: OptionsCommon, hostView?: View): Promise {
// Create image picker
const p = imagePicker.create({
mode: 'single',
maximumNumberOfSelection: 1,
mediaType: ImagePickerMediaType.Image,
}, hostView); // Hostview is important to render on top of a modal
// Authorization is required (allow app to ...)
return p.authorize()
.then(() => p.present()) // Present the imagepicker
.then((selection) => {
const imagePickerSelection = selection[0];
return Promise.all([Promise.resolve(imagePickerSelection.asset), isIOS ?
ImageSource.fromAsset(imagePickerSelection.asset) : null]);
})
.then((f: [ImageAsset, ImageSource]) => this.processPickedImage(f, options))
.catch(reason => Promise.reject(this.processPickingFailure(reason)));
}
The key NSPhotoLibraryUsageDescription has been added to info.plist
The error occurs after the p.present() and picking the image.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at @nativescript/imagepicker/index.ios.js around _loop_2 at line 142 and trace the path after p.present() in the provided pickImage flow. Reproduce the first-selection failure on the listed iOS versions. Done means the intermittent file-open error no longer terminates the app.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- ios, typescript
- Domain
- mobile-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100