显示所有的qt控件api例程

当然，我可以为您提供一些常见的Qt控件API的例程。下面是一些常见的Qt控件及其使用方法的示例：

1. QLabel（标签）:

   QLabel *label = new QLabel("Hello, World!", this);
   label->setAlignment(Qt::AlignCenter);
   label->show();

2. QPushButton（按钮）:

   QPushButton *button = new QPushButton("Click me", this);
   connect(button, &QPushButton::clicked, this, &MyClass::handleButton);
   button->show();

3. QLineEdit（文本输入框）:

   QLineEdit *lineEdit = new QLineEdit(this);
   lineEdit->setPlaceholderText("Enter your name");
   connect(lineEdit, &QLineEdit::returnPressed, this, &MyClass::handleReturnPressed);
   lineEdit->show();

4. QComboBox（下拉列表）:

   QComboBox *comboBox = new QComboBox(this);
   comboBox->addItem("Option 1");
   comboBox->addItem("Option 2");
   comboBox->addItem("Option 3");
   connect(comboBox, QOverload<int>::of(&QComboBox::activated), this, &MyClass::handleComboBoxActivated);
   comboBox->show();

5. QRadioButton（单选按钮）:

   QRadioButton *radioButton1 = new QRadioButton("Option 1", this);
   QRadioButton *radioButton2 = new QRadioButton("Option 2", this);
   QRadioButton *radioButton3 = new QRadioButton("Option 3", this);

   QButtonGroup *buttonGroup = new QButtonGroup(this);
   buttonGroup->addButton(radioButton1);
   buttonGroup->addButton(radioButton2);
   buttonGroup->addButton(radioButton3);

   connect(buttonGroup, QOverload<QAbstractButton*>::of(&QButtonGroup::buttonClicked), this, &MyClass::handleButtonGroupClicked);

   radioButton1->show();
   radioButton2->show();
   radioButton3->show();

这只是一些常见的Qt控件的例程，您可以根据您的需求进一步探索Qt文档和示例代码。希望这些例子对您有所帮助！