UIKeyboardHIDUsage.keyboard4 The raw usage code 33 (decimal)/21 (hexadecimal). Declarationcase keyboard4 See AlsoNumerical keysUIKeyboardHIDUsage.keyboard0UIKeyboardHIDUsage.keyboard1UIKeyboardHIDUsage.keyboard2UIKeyboardHIDUsage.keyboard3UIKeyboardHIDUsage.keyboard5UIKeyboardHIDUsage.keyboard6UIKeyboardHIDUsage.keyboard7UIKeyboardHIDUsage.keyboard8UIKeyboardHIDUsage.keyboard9