我有使用 Qt 构建的 MacOS 应用程序。在那里,我创建了 NSDistributedNotificationCenter 以在可访问性设置更改时收到通知(观察“com.apple.accessibility.api”)。我也有 CFRunLoopAddSource 来监控按键事件。
但是,当我运行程序并更改辅助功能时,应用程序挂起并且无法正常运行。
有人可以帮忙看看为什么会这样吗?
这是代码:
在这里我正在创建观察者:创建/删除由按钮单击控制
- (void)createObserver
{
[[NSDistributedNotificationCenter defaultCenter] addObserver:self
selector:@selector(didToggleAccessStatus:)
name:@"com.apple.accessibility.api"
object:nil
suspensionBehavior:NSNotificationSuspensionBehaviorDeliverImmediately];
}
这就是我添加关键事件记录器的方式:
// Create an event tap to retrieve keypresses.
CGEventMask eventMask = (CGEventMaskBit(kCGEventKeyDown) |
CGEventMaskBit(kCGEventFlagsChanged) |
CGEventMaskBit(kCGEventLeftMouseDown) |
CGEventMaskBit(kCGEventRightMouseDown) |
CGEventMaskBit(kCGEventMouseMoved) |
CGEventMaskBit(kCGEventScrollWheel));
//| CGEventMaskBit(kCGEventLeftMouseDragged)
//| CGEventMaskBit(kCGEventRightMouseDragged)
//| CGEventMaskBit(kCGEventOtherMouseDragged););
CFMachPortRef m_eventTap = nullptr;
CFRunLoopSourceRef m_runLoopSource = nullptr;
m_eventTap = CGEventTapCreate(
kCGSessionEventTap, kCGHeadInsertEventTap, kCGEventTapOptionDefault,
eventMask, myCGEventCallback, nullptr);
if (m_eventTap != Q_NULLPTR) {
NSLog(@"CGEventTap created");
// Create a run loop source and add enable the event tap.
m_runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, m_eventTap, 0);
CFRunLoopAddSource(CFRunLoopGetCurrent()/*CFRunLoopGetMain()*/, m_runLoopSource, kCFRunLoopCommonModes);
CGEventTapEnable(m_eventTap, true);
//CFRunLoopRun();
}
else {
m_runLoopSource = Q_NULLPTR;
NSLog(@"Error creating CGEventTap");
}
请问有什么想法吗?
提前致谢和问候