拦截长按mac os x

Question

我是Mac OS X开发的新手。是否可以创建一个应用程序，当用户long-presses对Finder中的文件名执行操作时。我不知道如何拦截long-press ......

Answer 1

// ---------------------------------

- (BOOL)acceptsFirstResponder
{
    return YES;
}

// ---------------------------------

- (BOOL)becomeFirstResponder
{
    return  YES;
}

// ---------------------------------

- (BOOL)resignFirstResponder
{
    return YES;
}

// ---------------------------------

- (void)mouseDown:(NSEvent *)theEvent
{
    NSPoint location = [self convertPoint:[theEvent locationInWindow] fromView:nil];
    // Do some test to see if we should handle the mouse down and set an instance BOOL variable myMouseClick (that mouseUp can also see)

    if(myMouseClick)
    {
        time = CFAbsoluteTimeGetCurrent () // time is also an instance variable mouseUp can see.
    }

}

// ---------------------------------

- (void)mouseUp:(NSEvent *)theEvent
{
    if (myMouseClick) 
    {
        CFTimeInterval deltaTime = CFAbsoluteTimeGetCurrent () - time;
        if(deltaTime > 2.0)
        {
            // Do your long click action
        }
    }
}