用qt写一个闹钟的UI界面

好的，以下是一个用Qt编写的简单闹钟UI界面的代码示例。

#include <QApplication>
#include <QBoxLayout>
#include <QComboBox>
#include <QDateTime>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QSpinBox>
#include <QTime>
#include <QWidget>

int main(int argc, char *argv[]) {
   QApplication a(argc, argv);

   QWidget *widget = new QWidget();
   widget->resize(400, 200);

   QLabel *title = new QLabel("闹钟");
   title->setFont(QFont("Arial", 20, QFont::Bold));

   QHBoxLayout *topLayout = new QHBoxLayout();
   topLayout->addWidget(title, 0, Qt::AlignHCenter);

   QLabel *hourLabel = new QLabel("小时:");
   QSpinBox *hourSpinBox = new QSpinBox();
   hourSpinBox->setRange(0, 23);
   hourSpinBox->setValue(QTime::currentTime().hour());

   QHBoxLayout *hourLayout = new QHBoxLayout();
   hourLayout->addWidget(hourLabel);
   hourLayout->addWidget(hourSpinBox);

   QLabel *minuteLabel = new QLabel("分钟:");
   QSpinBox *minuteSpinBox = new QSpinBox();
   minuteSpinBox->setRange(0, 59);
   minuteSpinBox->setValue(QTime::currentTime().minute());

   QHBoxLayout *minuteLayout = new QHBoxLayout();
   minuteLayout->addWidget(minuteLabel);
   minuteLayout->addWidget(minuteSpinBox);

   QLabel *soundLabel = new QLabel("响铃:");
   QComboBox *soundComboBox = new QComboBox();
   soundComboBox->addItem("无声");
   soundComboBox->addItem("铃声1");
   soundComboBox->addItem("铃声2");
   soundComboBox->addItem("铃声3");

   QHBoxLayout *soundLayout = new QHBoxLayout();
   soundLayout->addWidget(soundLabel);
   soundLayout->addWidget(soundComboBox);

   QPushButton *confirmButton = new QPushButton("确定");
   QPushButton *cancelButton = new QPushButton("取消");

   QHBoxLayout *buttonLayout = new QHBoxLayout();
   buttonLayout->addWidget(confirmButton);
   buttonLayout->addWidget(cancelButton);

   QVBoxLayout *mainLayout = new QVBoxLayout();
   mainLayout->addLayout(topLayout);
   mainLayout->addLayout(hourLayout);
   mainLayout->addLayout(minuteLayout);
   mainLayout->addLayout(soundLayout);
   mainLayout->addLayout(buttonLayout);

   widget->setLayout(mainLayout);
   widget->show();

   return a.exec();
}

希望这个代码示例能为你提供帮助！