toDataURL only works the second time it is executed in old Arch

[imanderson]

Hello,

in iOS and old Arch, I found that the callback on toDataURL method will only be called the second time of asking. This is due to when the queue from UIManager in iOS is flushed. See facebook/react-native#1365

I traced the problem to the iOS implementation and will do a PR with my fix.

Environment info

React native info output:

System:
  OS: macOS 14.3.1
  CPU: (12) arm64 Apple M2 Max
  Memory: 96.39 MB / 32.00 GB
  Shell:
    version: 3.6.0
    path: /opt/homebrew/bin/fish
Binaries:
  Node:
    version: 18.19.1
    path: ~/.nvm/versions/node/v18.19.1/bin/node
  Yarn:
    version: 1.22.21
    path: ~/.nvm/versions/node/v18.19.1/bin/yarn
  npm:
    version: 10.2.4
    path: ~/.nvm/versions/node/v18.19.1/bin/npm
  Watchman:
    version: 2024.01.22.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.14.3
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.2
      - iOS 17.2
      - macOS 14.2
      - tvOS 17.2
      - visionOS 1.0
      - watchOS 10.2
  Android SDK: Not Found
IDEs:
  Android Studio: 2023.1 AI-231.9392.1.2311.11330709
  Xcode:
    version: 15.2/15C500b
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.10
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.73.4
    wanted: 0.73.4
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false

Library version: 14.1.0

Steps To Reproduce

Simply run the Examples App in this repo with react-native 0.73.4 and go to "Tap the shapes to render the Image below based on the base64-data of the Svg". If you click once, nothing happens, but if you click a second time, the image is rendered.

[buschco]

Thank you for the issue and the fix. Works well for me 🙏

[imanderson]

Thank you for the issue and the fix. Works well for me 🙏

No problem! Im glad it helps 😊