TextInput : Unable to prevent chars to be added on iOS.

[yairopro]

• [v] I have reviewed the documentation
• [v] I have searched existing issues
• [v] I am using the latest React Native version

It's impossible on iOS to prevent some new chars to be typed.
Here's a snack where only numbers are accepted in the input. It works perfectly on android. No on iOS.

Environment

OS: macOS High Sierra 10.13.4
Node: 9.11.1
Yarn: 1.6.0
npm: 6.0.0
Watchman: Not Found
Xcode: Not Found
Android Studio: 3.1 AI-173.4720617

Steps to Reproduce

1. Taking the text from onChangeText callback
2. Removing the new typed char if it's not accepted.
3. Updating the TextInput's value using the setState method.

Expected Behavior

Removing the char as soon as it's been typed. Works on Android.

Actual Behavior

The non accepted char stays in the TextInput even though the component re-rendered assigning the corrected value to the TextInput.

[react-native-bot]

Thanks for posting this! It looks like your issue may be missing some necessary information. Can you run react-native info and edit your issue to include these results under the Environment section?

Thank you for your contributions.

[yairopro]

It's already included.

[francisli]

Maybe a duplicate of #18874 ...?

[yairopro]

@francisli That's right. Sorry.
Should I close?

[react-native-bot]

Duplicate of #18874