ios安全区域高度

// 顶部安全区高度
+ (CGFloat)dev_safeDistanceTop {
   if (@available(iOS 13.0, *)) {
       NSSet *set = [UIApplication sharedApplication].connectedScenes;
       UIWindowScene *windowScene = [set anyObject];
       UIWindow *window = windowScene.windows.firstObject;
       return window.safeAreaInsets.top;
   } else if (@available(iOS 11.0, *)) {
       UIWindow *window = [UIApplication sharedApplication].windows.firstObject;
       return window.safeAreaInsets.top;
   }
   return 0;
}

//顶部状态栏高度（包括安全区）
+ (CGFloat)dev_statusBarHeight {
   if (@available(iOS 13.0, *)) {
       NSSet *set = [UIApplication sharedApplication].connectedScenes;
       UIWindowScene *windowScene = [set anyObject];
       UIStatusBarManager *statusBarManager = windowScene.statusBarManager;
       return statusBarManager.statusBarFrame.size.height;
   } else {
       return [UIApplication sharedApplication].statusBarFrame.size.height;
   }
}
// 底部安全区高度
+ (CGFloat)dev_safeDistanceBottom {
   if (@available(iOS 13.0, *)) {
       NSSet *set = [UIApplication sharedApplication].connectedScenes;
       UIWindowScene *windowScene = [set anyObject];
       UIWindow *window = windowScene.windows.firstObject;
       return window.safeAreaInsets.bottom;
   } else if (@available(iOS 11.0, *)) {
       UIWindow *window = [UIApplication sharedApplication].windows.firstObject;
       return window.safeAreaInsets.bottom;
   }
   return 0;
} 

// 导航栏高度
+ (CGFloat)dev_navigationBarHeight {
   return 44.0f;
}

// 状态栏+导航栏的高度
+ (CGFloat)dev_navigationFullHeight {
   return [UIDevice dev_statusBarHeight] + [UIDevice dev_navigationBarHeight];
}

// 底部导航栏高度
+ (CGFloat)dev_tabBarHeight {
   return 49.0f;
}

// 底部导航栏高度（包括安全区）
+ (CGFloat)dev_tabBarFullHeight {
   return [UIDevice dev_statusBarHeight] + [UIDevice dev_safeDistanceBottom];
}