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Today I Learned
License: MIT License
func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
if velocity.y < 0 {
downHomeView()
} else if velocity.y > 0 {
upHomeView()
}
}
// 스크롤이 위로 발생했을 때 효과
func topViewUp() {
UIView.animate(withDuration: 0.3, delay: 0, options: .curveEaseOut, animations: {
// 상단바 위치 올리기
self.topView.transform = CGAffineTransform(translationX: 0, y: -115)
self.view.layoutIfNeeded()
})
}
CGAffineTransform(translationX: 0, y: -self.scrollView.contentOffset.y)
guard self.scrollView.contentOffset.y <= CGFloat(115) else { return }
contentOffset.y 값이 바뀌는 속도에 따라서 return 되는 지점이 다르다.
스크롤 강도를 어떻게 했느냐에 따라 topView의 y 위치가 조금 변경되기도 하고 많이 변경되기도 하여 return 되는 시점의 y값을 출력해보니 아래와 같이 때마다 달랐다.
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