UITableView - iOS 10과 iOS 11에서 UITableViewCell의 superview 주의점!

UITableViewCell 객체에서 superview에 접근할 경우, iOS 10과 iOS 11 에서 주의할 점이 있다.

iOS 10의 경우에 UITableViewCell객체에서 superview로 접근할 때, UITableViewWrapperView가 superview로 나타난다.

dump(self.superview)

▿ Optional(<UITableViewWrapperView: 0x102002c00; frame = (0 0; 320 504); gestureRecognizers = <NSArray: 0x17405e120>; layer = <CALayer: 0x174026ee0>; contentOffset: {0, 0}; contentSize: {320, 504}>)

  - some: <UITableViewWrapperView: 0x102002c00; frame = (0 0; 320 504); gestureRecognizers = <NSArray: 0x17405e120>; layer = <CALayer: 0x174026ee0>; contentOffset: {0, 0}; contentSize: {320, 504}> #0

    - super: UIScrollView

      - super: UIView

        - super: UIResponder

          - super: NSObject

UITableView로 접근하기 위해서는 한번더 superview를 불러야 UITableView가 불린다.

dump(self.superview?.superview)

▿ Optional(<UITableView: 0x101029c00; frame = (0 0; 320 568); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x174047b30>; layer = <CALayer: 0x174037840>; contentOffset: {0, -64}; contentSize: {320, 1330}>)

  - some: <UITableView: 0x101029c00; frame = (0 0; 320 568); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x174047b30>; layer = <CALayer: 0x174037840>; contentOffset: {0, -64}; contentSize: {320, 1330}> #0

    - super: UIScrollView

      - super: UIView

        - super: UIResponder

          - super: NSObject

iOS 11의 경우 UITableViewCell객체에서 superview로 접근할 때, UITableView가 superview로 나타난다.

dump(self.superview)

▿ Optional(<UITableView: 0x12500fc00; frame = (0 0; 375 812); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x1d4050320>; layer = <CALayer: 0x1d402c7a0>; contentOffset: {0, -88}; contentSize: {375, 1162}; adjustedContentInset: {88, 0, 83, 0}>)

  - some: <UITableView: 0x12500fc00; frame = (0 0; 375 812); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x1d4050320>; layer = <CALayer: 0x1d402c7a0>; contentOffset: {0, -88}; contentSize: {375, 1162}; adjustedContentInset: {88, 0, 83, 0}> #0

    - super: UIScrollView

      - super: UIView

        - super: UIResponder

          - super: NSObject

iOS 11부터는 UITableViewWrapperView가 사라졌다. 

Deployment Target이 10.0이상부터 일때, 이를 주의하여 처리할 필요가 있다.