可可-CGEventPost鼠标单击后，屏幕不刷新

如何解决可可-CGEventPost鼠标单击后，屏幕不刷新

| 当用户单击某个键盘键（CapsLock）时，我以编程方式生成鼠标单击。因此，当打开CapsLock时，我将鼠标左键按下，然后关闭CapsLock时，将鼠标左键向上拖动。这样的行为是正确的，例如，如果我将鼠标放在窗口标题栏上，请单击CapsLock，然后移动鼠标，然后单击CapsLock，窗口将正确移动。即，我正确地“拖动”了该窗口，就像在移动鼠标时按住鼠标左键一样。但是，有一个问题-当我移动鼠标时窗口不会移动，仅当我第二次单击CapsLock后它才会移动到最终位置。即在我“释放”鼠标按钮之后。我需要做什么以确保在鼠标移动期间刷新屏幕？有趣的是，我也迷上了 [NSEvent addGlobalMonitorForEventsMatchingMask：NSLeftMouseDraggedMask 并发现我的NSLog语句仅在释放鼠标左键（真正的鼠标左键）后输出鼠标单击代码在下面，如果需要，我可以发布所有代码，但是代码不多。

// simulate mouse down

// get current mouse pos
CGEventRef ourEvent = CGEventCreate(NULL);
CGPoint point = CGEventGetLocation(ourEvent);
NSLog(@\"Location? x= %f,y = %f\",(float)point.x,(float)point.y);

CGEventSourceRef source = CGEventSourceCreate(kCGEventSourceStateCombinedSessionState);
CGEventRef theEvent = CGEventCreateMouseEvent(source,kCGEventLeftMouseDown,point,kCGMouseButtonLeft);
CGEventSetType(theEvent,kCGEventLeftMouseDown);
CGEventPost(kCGHIDEventTap,theEvent);
CFRelease(theEvent);


// simulate mouse up

// get current mouse pos
CGEventRef ourEvent = CGEventCreate(NULL);
CGPoint point = CGEventGetLocation(ourEvent);
NSLog(@\"Location? x= %f,kCGEventLeftMouseUp,kCGEventLeftMouseUp);
CGEventPost(kCGHIDEventTap,theEvent);
CFRelease(theEvent);

解决方法

如果您希望能够拖动窗口，那么问题在于您还需要发布LeftMouseDragged事件。只需按beginEventMonitoring开始监听大写锁定键事件和鼠标移动事件。事件处理程序将根据需要模拟鼠标左键的按下和移动。这是我的博客的链接，您可以在其中下载Xcode 4的完整示例：http://www.jakepetroules.com/2011/06/25/simulating-mouse-events-in-cocoa 该示例位于公共领域，您可以根据自己的喜好进行操作。 :) 根据Apple（NSEvent文档）的介绍，需要在“系统偏好设置”>“通用访问”中检查“启用辅助设备的访问权限”才能使它起作用，但是我没有选中它，这不是问题。只是抬头。如果您有其他任何问题，请告诉我，我们将尽力提供帮助。

// Begin listening for caps lock key presses and mouse movements
- (void)beginEventMonitoring
{
    // Determines whether the caps lock key was initially down before we started listening for events
    wasCapsLockDown = CGEventSourceKeyState(kCGEventSourceStateHIDSystemState,kVK_CapsLock);

    capsLockEventMonitor = [NSEvent addGlobalMonitorForEventsMatchingMask:(NSFlagsChangedMask) handler: ^(NSEvent *event)
    {
        // Determines whether the caps lock key was pressed and posts a mouse down or mouse up event depending on its state
        bool isCapsLockDown = [event modifierFlags] & NSAlphaShiftKeyMask;
        if (isCapsLockDown && !wasCapsLockDown)
        {
            [self simulateMouseEvent: kCGEventLeftMouseDown];
            wasCapsLockDown = true;
        }
        else if (wasCapsLockDown)
        {
            [self simulateMouseEvent: kCGEventLeftMouseUp];
            wasCapsLockDown = false;
        }
    }];

    mouseMovementEventMonitor = [NSEvent addGlobalMonitorForEventsMatchingMask:(NSMouseMovedMask) handler:^(NSEvent *event)
    {
        [self simulateMouseEvent: kCGEventLeftMouseDragged];
    }];
}

// Cease listening for caps lock key presses and mouse movements
- (void)endEventMonitoring
{
    if (capsLockEventMonitor)
    {
        [NSEvent removeMonitor: capsLockEventMonitor];
        capsLockEventMonitor = nil;
    }

    if (mouseMovementEventMonitor)
    {
        [NSEvent removeMonitor: mouseMovementEventMonitor];
        mouseMovementEventMonitor = nil;
    }
}

-(void)simulateMouseEvent:(CGEventType)eventType
{
    // Get the current mouse position
    CGEventRef ourEvent = CGEventCreate(NULL);
    CGPoint mouseLocation = CGEventGetLocation(ourEvent);

    // Create and post the event
    CGEventRef event = CGEventCreateMouseEvent(CGEventSourceCreate(kCGEventSourceStateHIDSystemState),eventType,mouseLocation,kCGMouseButtonLeft);
    CGEventPost(kCGHIDEventTap,event);
    CFRelease(event);
}