Cocoa: keyEquivalent（NSXXFunctionKey）&& modifierFlags

Cocoa开发：快捷键

常见的keyEquivalent值：

NSUpArrowFunctionKey = 0xF700, 
NSDownArrowFunctionKey = 0xF701, 
NSLeftArrowFunctionKey = 0xF702, 
NSRightArrowFunctionKey = 0xF703, 
NSF1FunctionKey = 0xF704, 
NSF2FunctionKey = 0xF705, 
NSF3FunctionKey = 0xF706, 
NSF4FunctionKey = 0xF707, 
NSF5FunctionKey = 0xF708, 
NSF6FunctionKey = 0xF709, 
NSF7FunctionKey = 0xF70A, 
NSF8FunctionKey = 0xF70B, 
NSF9FunctionKey = 0xF70C, 
NSF10FunctionKey = 0xF70D, 
NSF11FunctionKey = 0xF70E, 
NSF12FunctionKey = 0xF70F, 
NSF13FunctionKey = 0xF710, 
NSF14FunctionKey = 0xF711, 
NSF15FunctionKey = 0xF712, 
NSF16FunctionKey = 0xF713, 
NSF17FunctionKey = 0xF714, 
NSF18FunctionKey = 0xF715, 
NSF19FunctionKey = 0xF716, 
NSF20FunctionKey = 0xF717, 
NSF21FunctionKey = 0xF718, 
NSF22FunctionKey = 0xF719, 
NSF23FunctionKey = 0xF71A, 
NSF24FunctionKey = 0xF71B, 
NSF25FunctionKey = 0xF71C, 
NSF26FunctionKey = 0xF71D, 
NSF27FunctionKey = 0xF71E, 
NSF28FunctionKey = 0xF71F, 
NSF29FunctionKey = 0xF720, 
NSF30FunctionKey = 0xF721, 
NSF31FunctionKey = 0xF722, 
NSF32FunctionKey = 0xF723, 
NSF33FunctionKey = 0xF724, 
NSF34FunctionKey = 0xF725, 
NSF35FunctionKey = 0xF726, 
NSInsertFunctionKey = 0xF727, 
NSDeleteFunctionKey = 0xF728, 
NSHomeFunctionKey = 0xF729, 
NSBeginFunctionKey = 0xF72A, 
NSEndFunctionKey = 0xF72B, 
NSPageUpFunctionKey = 0xF72C, 
NSPageDownFunctionKey = 0xF72D, 
NSPrintScreenFunctionKey = 0xF72E, 
NSScrollLockFunctionKey = 0xF72F, 
NSPauseFunctionKey = 0xF730, 
NSSysReqFunctionKey = 0xF731, 
NSBreakFunctionKey = 0xF732, 
NSResetFunctionKey = 0xF733, 
NSStopFunctionKey = 0xF734, 
NSMenuFunctionKey = 0xF735, 
NSUserFunctionKey = 0xF736, 
NSSystemFunctionKey = 0xF737, 
NSPrintFunctionKey = 0xF738, 
NSClearLineFunctionKey = 0xF739, 
NSClearDisplayFunctionKey = 0xF73A, 
NSInsertLineFunctionKey = 0xF73B, 
NSDeleteLineFunctionKey = 0xF73C, 
NSInsertCharFunctionKey = 0xF73D, 
NSDeleteCharFunctionKey = 0xF73E, 
NSPrevFunctionKey = 0xF73F, 
NSNextFunctionKey = 0xF740, 
NSSelectFunctionKey = 0xF741, 
NSExecuteFunctionKey = 0xF742, 
NSUndoFunctionKey = 0xF743, 
NSRedoFunctionKey = 0xF744, 
NSFindFunctionKey = 0xF745, 
NSHelpFunctionKey = 0xF746, 
NSModeSwitchFunctionKey = 0xF747 

特殊的按键形如Shift或Command等则根据flagsChanged(with event: NSEvent) 这个重写方法进行判断，示例如下：

override func flagsChanged(with event: NSEvent) {
    if event.modifierFlags.contains(.shift) && event.modifierFlags.contains(.command) {
        
    }
}

modifierFlags属性存在于整个回调期间，则可以根据其是否包含xxx的布尔值判断其是否是属于按压或松开状态。