End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
iOS 프로그래밍: 컬렉션 뷰 (Swift, 스토리보드) – 컬렉션 뷰 추가, 커스텀 셀 작성 http://yoonbumtae.com/?p=3418