iPhoneX适配记录

// UIScreen width.
#define  LL_ScreenWidth   [UIScreen mainScreen].bounds.size.width

// UIScreen height.
#define  LL_ScreenHeight  [UIScreen mainScreen].bounds.size.height
// iPhone X 
#define  LL_iPhoneX (LL_ScreenWidth == 375.f && LL_ScreenHeight == 812.f ? YES : NO)

// Status bar height.
#define  LL_StatusBarHeight      (LL_iPhoneX ? 44.f : 20.f)

// Navigation bar height.
#define  LL_NavigationBarHeight  44.f

// Tabbar height.
#define  LL_TabbarHeight         (LL_iPhoneX ? (49.f+34.f) : 49.f)

// Tabbar safe bottom margin.
#define  LL_TabbarSafeBottomMargin         (LL_iPhoneX ? 34.f : 0.f)

// Status bar & navigation bar height.
#define  LL_StatusBarAndNavigationBarHeight  (LL_iPhoneX ? 88.f : 64.f)

#define LL_ViewSafeAreInsets(view) ({UIEdgeInsets insets; if(@available(iOS 11.0, *)) {insets = view.safeAreaInsets;} else {insets = UIEdgeInsetsZero;} insets;})

借鉴：https://www.jianshu.com/p/52135c5f144e