Question 1

How does react-native-canvas handle performance for animations?

Accepted Answer

react-native-canvas relies on WebView for rendering, which may not be optimal for smooth, high-frame-rate animations due to latency. For better performance, consider native libraries or limit drawing complexity and frequency.

Question 2

Can I use react-native-canvas with Expo managed workflow?

Accepted Answer

Since it requires linking react-native-webview, it might not be fully compatible with Expo's managed workflow without ejecting or using custom development builds. Check Expo's documentation for WebView configuration options.

Question 3

How to save a canvas drawing as an image file in React Native?

Accepted Answer

Use the toDataURL() method to get a DataURL, then convert it to a base64 string and save it using React Native's file system APIs like react-native-fs or display it with an image component. Handle permissions for file access as needed.

Question 4

react-native-canvas vs react-native-skia: which should I choose?

Accepted Answer

react-native-canvas is better for web developers familiar with Canvas API, offering ease of use, while react-native-skia provides higher performance with the Skia graphics engine but has a steeper learning curve. Choose based on performance needs and team expertise.

Question 5

How to implement touch interactions on a canvas in react-native-canvas?

Accepted Answer

The canvas itself doesn't handle touch events natively; overlay touchable components or use gesture libraries like react-native-gesture-handler to capture inputs and map coordinates to drawing operations for interactive features.

Question 6

What are the main differences between react-native-canvas and the web Canvas API?

Accepted Answer

Key differences include the Image and Path2D constructors requiring canvas as the first argument, and asynchronous method returns needing 'await', as mentioned in the README. Otherwise, it closely mimics the web API for most 2D drawing tasks.

react-native-canvas

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