Building a Card Flip Animation in SwiftUI
WHAT IT TESTS: SwiftUI animation and 3D transform fluency. OUTLINE: drive a flipped state, rotate both faces with rotation3DEffect, hide the back face. RED FLAG: forgetting the back is mirrored or showing both faces at once.
WHAT IT TESTS: ability to compose declarative animations and 3D transforms. ANSWER OUTLINE: keep a Bool state for flipped, overlay front and back views, apply rotation3DEffect around the y axis so they rotate together, and gate visibility with opacity near ninety degrees so only one face shows. The back must be pre-rotated 180 degrees so its text is not mirrored, and the angle changes inside withAnimation. RED FLAG: ignoring the mirrored back face, or showing both faces simultaneously through the half-turn.
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- #ios
- #swift
- #swiftui
- #animation
- #3d-transform
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