我是c的新手,并且不熟悉线程我希望有人可以发布一个例子或指出我正确的方向.
我有一个窗体,它在c builder中加载formShow()函数.它做我想要我的程序做的事情,但只有在那之后它才会显示实际的表格.
为此我需要线程化程序的表单和后台运行.任何人都可以帮助我吗？
解决方法
直到OnShow事件退出之后才延迟逻辑可能会更简单,而根本不使用线程.例如：
const UINT WM_DO_WORK = WM_USER + 1;
void __fastcall TForm1::FormShow(TObject *Sender)
{
PostMessage(Handle,WM_DO_WORK,0);
}
void __fastcall TForm1::WndProc(TMessage &Message)
{
if (Message.Msg == WM_DO_WORK)
{
// do work here ...
}
else
TForm::WndProc(Message);
}
如果你真的想要编写代码,你可以这样做：
class TMyThread : public TThread
{
protected:
virtual void __fastcall Execute();
public:
__fastcall TMyThread();
};
__fastcall TMyThread::TMyThread()
: TThread(true)
{
FreeOnTerminate = true;
// setup other thread parameters as needed...
}
void __fastcall TMyThread::Execute()
{
// do work here ...
// if you need to access the UI controls,// use the TThread::Synchornize() method for that
}
void __fastcall TForm1::FormShow(TObject *Sender)
{
TMyThread *thrd = new TMyThread();
thrd->OnTerminate = &ThreadTerminated;
thrd->Resume();
}
void __fastcall TForm1::ThreadTerminated(TObject *Sender)
{
// thread is finished with its work ...
}
