我一直在寻找这个问题，但却没有找到如何去做的运气。
我想返回上一行，并向其中添加文字，例如，以下
E.g。
在某些Linux CentralManagerImpl::CentralManagerImpl()
{
_shim = ref new CentralManagerCppCxShim(this);
_deviceWatcher = DeviceInformation::CreateWatcher(BluetoothLEDevice::GetDeviceSelectorFromPairingState(true));
_deviceWatcherAdded = _deviceWatcher->Added += ref new TypedEventHandler<DeviceWatcher ^, DeviceInformation ^>(_shim, &CentralManagerCppCxShim::OnDeviceAdded);
_deviceWatcherRemoved = _deviceWatcher->Removed += ref new TypedEventHandler<DeviceWatcher ^, DeviceInformationUpdate ^>(_shim, &CentralManagerCppCxShim::OnDeviceRemoved);
_deviceWatcherUpdated = _deviceWatcher->Updated += ref new TypedEventHandler<DeviceWatcher ^, DeviceInformationUpdate ^>(_shim, &CentralManagerCppCxShim::OnDeviceUpdated);
_deviceWatcher->Stopped += ref new TypedEventHandler<DeviceWatcher ^, Object ^>(_shim, &CentralManagerCppCxShim::OnDeviceWatcherStopped);
_watcher = ref new BluetoothLEAdvertisementWatcher();
BluetoothLEManufacturerData ^manufacturerData = ref new BluetoothLEManufacturerData();
manufacturerData->CompanyId = MAKEWORD(HIBYTE(OUR_COMPANY_IDENTIFIER), LOBYTE(OUR_COMPANY_IDENTIFIER));
_watcher->AdvertisementFilter->Advertisement->ManufacturerData->Append(manufacturerData);
_watcher->Stopped += ref new TypedEventHandler<BluetoothLEAdvertisementWatcher ^, BluetoothLEAdvertisementWatcherStoppedEventArgs ^>(_shim, &CentralManagerCppCxShim::OnAdvertisementWatcherStopped);
_watcherReceived = _watcher->Received += ref new TypedEventHandler<BluetoothLEAdvertisementWatcher ^, BluetoothLEAdvertisementReceivedEventArgs ^>(_shim, &CentralManagerCppCxShim::OnAdvertisementReceived);
}
CentralManagerImpl::~CentralManagerImpl()
{
_watcher->Received -= _watcherReceived;
_watcher = nullptr;
_deviceWatcher->Updated -= _deviceWatcherUpdated;
_deviceWatcher->Removed -= _deviceWatcherRemoved;
_deviceWatcher->Added -= _deviceWatcherAdded;
_deviceWatcher = nullptr; // this crashes :(
}
void CentralManagerImpl::StartScan()
{
_deviceWatcher->Start();
_watcher->Start();
}
void CentralManagerImpl::StopScan()
{
_watcher->Stop();
_deviceWatcher->Stop();
}
上运行ntdll.dll!_TppRaiseInvalidParameter@0()
ntdll.dll!_TpPostWork@4()
cfgmgr32.dll!TQuery::CloseQuery()
cfgmgr32.dll!_DevCloseObjectQuery@4()
Windows.Devices.Enumeration.dll!Watcher<class Windows::Devices::Enumeration::DeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher2,class Windows::Devices::Enumeration::DeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation2,class DeviceInformationServer,class Windows::Devices::Enumeration::DeviceInformationUpdate,struct Windows::Devices::Enumeration::IDeviceInformationUpdate,class DeviceInformationUpdateServer,&unsigned short const * const RuntimeClass_Windows_Devices_Enumeration_DeviceWatcher>::Impl::EndQuery(void)
Windows.Devices.Enumeration.dll!Watcher<class Windows::Devices::Enumeration::DeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher2,class Windows::Devices::Enumeration::DeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation2,class DeviceInformationServer,class Windows::Devices::Enumeration::DeviceInformationUpdate,struct Windows::Devices::Enumeration::IDeviceInformationUpdate,class DeviceInformationUpdateServer,&unsigned short const * const RuntimeClass_Windows_Devices_Enumeration_DeviceWatcher>::Impl::Stop(bool)
Windows.Devices.Enumeration.dll!Watcher<class Windows::Devices::Enumeration::DeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher2,class Windows::Devices::Enumeration::DeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation2,class DeviceInformationServer,class Windows::Devices::Enumeration::DeviceInformationUpdate,struct Windows::Devices::Enumeration::IDeviceInformationUpdate,class DeviceInformationUpdateServer,&unsigned short const * const RuntimeClass_Windows_Devices_Enumeration_DeviceWatcher>::~Watcher<class Windows::Devices::Enumeration::DeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher2,class Windows::Devices::Enumeration::DeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation2,class DeviceInformationServer,class Windows::Devices::Enumeration::Devic()
Windows.Devices.Enumeration.dll!Watcher<class Windows::Devices::Enumeration::DeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher,struct Windows::Devices::Enumeration::IDeviceWatcher2,class Windows::Devices::Enumeration::DeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation,struct Windows::Devices::Enumeration::IDeviceInformation2,class DeviceInformationServer,class Windows::Devices::Enumeration::DeviceInformationUpdate,struct Windows::Devices::Enumeration::IDeviceInformationUpdate,class DeviceInformationUpdateServer,&unsigned short const * const RuntimeClass_Windows_Devices_Enumeration_DeviceWatcher>::`vector deleting destructor'(unsigned int)
Windows.Devices.Enumeration.dll!Microsoft::WRL::Details::RuntimeClass<struct Microsoft::WRL::Details::InterfaceList<struct Windows::Devices::Enumeration::IDeviceWatcher,struct Microsoft::WRL::Details::InterfaceList<struct Windows::Devices::Enumeration::IDeviceWatcher2,struct Microsoft::WRL::Details::InterfaceList<struct Windows::Foundation::IClosable,struct Microsoft::WRL::Details::InterfaceList<class Microsoft::WRL::FtmBase,class Microsoft::WRL::Details::Nil> > > >,struct Microsoft::WRL::RuntimeClassFlags<3>,1,1,0>::Release(void)
mydll.dll!__abi_winrt_ptr_assign(void * * __ppTargetArg, const volatile Platform::Object ^ __objArg) Line 405
mydll.dll!CentralManagerImpl::~CentralManagerImpl() Line 64
[External Code]
//…
时，我注意到以下内容：
make这将通过类似的＆amp;基本的伪代码概念（据我所知和理解）。
makefile这将输出：
检查：{fileName} ........
完成
有没有办法可以在椭圆后添加完成？
我记得在ncurses和其他一些libs上读过一些东西，但我更愿意，如果这可以纯粹使用Qt来完成
提前致谢
答案 0 :(得分：1)
我认为这不可能在经典的控制台应用程序中完成。控制台只是一个流，你不能回去改变东西，做了什么。如果要表示更新，请输出与更新相同的行。
或者，如果你想要做的只是在同一行有done，那就跳过上一个std::endl。然后就没有必要回去了。
答案 1 :(得分：0)
这不是通过备份线来完成的。相反，该行的初始部分是在没有换行符的情况下输出的，然后当＆＃34;完成＆＃34;打印部分，它继续在当前行。这实际上不是Qt问题;你的示例代码是没有任何Qt的纯C ++，但你需要做的就是删除＆＃34; std :: endl＆＃34;从打印的行＆＃34;检查：＆＃34;。