go run -tags=example github.com/hajimehoshi/ebiten/examples/rotateInstall gomobile first.
gomobile install -tags=example github.com/hajimehoshi/ebiten/examples/rotategomobile build -target=ios -tags=example -work github.com/hajimehoshi/ebiten/examples/rotateThen, open the WORK directory, open main.xcodeproj, add signing, and run the project.