Settings.watchKeys(...) callback not fired when Settings.set() is used

[benzman81]

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• Search for existing issues: https:/facebook/react-native/issues
• Use the latest React Native release: https:/facebook/react-native/releases

Environment

React Native Environment Info:
System:
OS: macOS 10.14
CPU: x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
Memory: 57.88 MB / 8.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 8.11.3 - /usr/local/bin/node
npm: 5.6.0 - /usr/local/bin/npm
SDKs:
iOS SDK:
Platforms: iOS 12.0, macOS 10.14, tvOS 12.0, watchOS 5.0
IDEs:
Xcode: 10.0/10A255 - /usr/bin/xcodebuild
npmPackages:
react: 16.5.0 => 16.5.0
react-native: 0.57.0 => 0.57.0
npmGlobalPackages:
react-native-app-id: 0.0.5
react-native-cli: 2.0.1

Description

When registering a callback via Settings.watchKeys, then it is never called if a value for a watched key is changed via Settings.set(). Only if I add a Settings.bundle to Xcode and change the Value via the iOS Settings app, then the callback is called.

Reproducible Demo

Simply register a callback on "foo" via Settings.watchKeys and call Settings.set{foo:"new Value"} later. The callback will not be called.

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as "For Discussion" or "Good first issue" and I will leave it open. Thank you for your contributions.

[benzman81]

For Discussion

[TroX-oO]

Hello, I've been through the same issue, and i've checked the ios native implementation. It is clearly written that no update should be triggered when a value is set with the method Settings.set()

react-native/Libraries/Settings/RCTSettingsManager.m

Line 82 in 44fe990

RCT_EXPORT_METHOD(setValues:(NSDictionary *)values)

I don't know why it is implemented like this, but it seems to be the expected behaviour.
It is a bit surprising that the documentation does not mention this case however.

https://facebook.github.io/react-native/docs/settings

As a workaround, instead of counting on the watchkeys, I will trigger an action as well as setting my property in UserDefaults.

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[stale]

Closing this issue after a prolonged period of inactivity. If this issue is still present in the latest release, please feel free to create a new issue with up-to-date information.