QT Creator窗口部件

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利用QT建立窗口部件

#include<QtWidgets>int main(int argc,char *argv[]){    QApplication a(argc,argv);    QWidget *widget = new QWidget();//新建QWidget类对象，默认parent参数是0,所以它是个窗口    widget->setWindowTitle(QObject::tr("I'm widget"));//窗口标题    QLabel*label = new QLabel();//新建QLabel类对象，默认parent参数是0,所以它是个窗口    label->setWindowTitle(QObject::tr("I'm label"));    label->setText(QObject::tr("label:I'm a window"));//窗口内显示信息    label->resize(180,20);//部件大小    QLabel *label2 = new QLabel(widget);//指定父窗口为widget，不是窗口    label2->setText(QObject::tr("label2:I'm not a independent window.I'm just the subcomponent"));    label->resize(250,20);    label->show();    widget->show();//显示    int ret = a.exec();    delete label;    delete widget;    return ret;}要在项目中的.pro文件内加上"QT+=widgets"

更改新建对象的代码为：

#include<QtWidgets>int main(int argc,char *argv[]){    QApplication a(argc,argv);    QWidget *widget = new QWidget(0,Qt::Dialog);    widget->setWindowTitle(QObject::tr("I'm widget"));    QLabel*label = new QLabel();    label->setWindowTitle(QObject::tr("I'm label"));    label->setText(QObject::tr("label:I'm a window"));    label->resize(180,20);    QLabel *label2 = new QLabel(0,Qt::SplashScreen);    label2->setText(QObject::tr("label2:I'm not a independent window.I'm just the subcomponent"));    label->resize(250,20);    label->show();    widget->show();    int ret = a.exec();    delete label;    delete widget;    return ret;}

结果窗口类型的样式变成了欢迎窗口类型

再次修改

#include<QtWidgets>int main(int argc,char *argv[]){    QApplication a(argc,argv);    QWidget *widget = new QWidget(0,Qt::Dialog | Qt::FramelessWindowHint);    widget->setWindowTitle(QObject::tr("I'm widget"));    QLabel*label = new QLabel();    label->setWindowTitle(QObject::tr("I'm label"));    label->setText(QObject::tr("label:I'm a window"));    label->resize(180,20);    QLabel *label2 = new QLabel(0,Qt::SplashScreen | Qt::WindowStaysOnBottomHint);    label2->setText(QObject::tr("label2:I'm not a independent window.I'm just the subcomponent"));    label->resize(250,20);    label->show();    widget->show();    int ret = a.exec();    delete label;    delete widget;    return ret;}

结果窗口标题隐藏起来了

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