✅ 100% compatible with UIKit. All IBAnimatable APIs are extensions of UIKit. No pollutions to UIKit's APIs. ✅ 100% compatible with Auto Layout and Size Classes. No custom layout system. ✅ User interface design and preview in IB: corner radius, border, mask, shadow, gradient colors, tint color, blur effect etc. ✅ Animation design in IB: slide in/out, fade in/out, zoom in/out, flip, pop, shake, rota
