代码库
Free, open-source Sidecar/Duet alternative — use your iPhone, iPad or Mac as a true second monitor for your primary Mac over USB or WiFi. Low latency H.264, Retina HiDPI, touch input.
Swift
duet-displayexternal-displayipadiphonemacosscreen-extensionscreencapturekitsecond-monitorsidecarswiftvideotoolboxvirtual-display