本文共 3390 字，大约阅读时间需要 11 分钟。

1.自定义开关控件；

2.点击有动画效果；

3.在动画效果中，不再响应信号；

运行截图如下：

输出响应信号：

源码如下：

myonoff.h

#ifndef MYONOFF_H#define MYONOFF_H#include 
   
    QT_BEGIN_NAMESPACEclass QPropertyAnimation;QT_END_NAMESPACEclass MyOnOff : public QLabel{    Q_OBJECT    Q_PROPERTY(int onoffStatus READ onoffStatus WRITE setOnoffStatus NOTIFY onoffStatusChanged)public:    enum status{ON,OFF};    MyOnOff(QWidget *parent = 0);    int onoffStatus()const;    void setOnoffStatus(const int status);signals:    void onoffStatusChanged(int status);protected:    void paintEvent(QPaintEvent *event)Q_DECL_OVERRIDE;    void mouseReleaseEvent(QMouseEvent *event)Q_DECL_OVERRIDE;    void controlWidgetChanged();private:    int m_onoffStatus;    bool m_animationIsRun;    QPropertyAnimation *m_propertyAnimation;};#endif // MYONOFF_H
   

widget.h

#ifndef WIDGET_H#define WIDGET_H#include 
   
    namespace Ui {class Widget;}class Widget : public QWidget{    Q_OBJECTpublic:    explicit Widget(QWidget *parent = 0);    ~Widget();public slots:    void onOffStatus(int status);private:    Ui::Widget *ui;};#endif // WIDGET_H
   

main.cpp

#include "widget.h"#include 
   
    int main(int argc, char *argv[]){    QApplication a(argc, argv);    Widget w;    w.show();    return a.exec();}
   

myonoff.cpp

#include "myonoff.h"#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        #include 
        
         MyOnOff::MyOnOff(QWidget *parent) : QLabel(parent) , m_onoffStatus(ON) , m_animationIsRun(false){ m_propertyAnimation=new QPropertyAnimation(this,"minimumSize");}int MyOnOff::onoffStatus() const{ return m_onoffStatus;}void MyOnOff::setOnoffStatus(const int status){ m_onoffStatus=status; emit onoffStatusChanged(m_onoffStatus);}void MyOnOff::paintEvent(QPaintEvent *event){ Q_UNUSED(event) QPainter painter(this); painter.save(); if(m_onoffStatus){ painter.drawPixmap(0,0,QPixmap(":/img/off.png").scaled(minimumSize())); } else{ painter.drawPixmap(0,0,QPixmap(":/img/on.png").scaled(minimumSize())); } painter.restore();}void MyOnOff::mouseReleaseEvent(QMouseEvent *event){ if(event->button()==Qt::LeftButton&&!m_animationIsRun){ m_animationIsRun=true; bool onoffStatus=m_onoffStatus; setOnoffStatus(!onoffStatus); update(); //Began to change controlWidgetChanged(); m_animationIsRun=false; } event->accept();}void MyOnOff::controlWidgetChanged(){ m_propertyAnimation->setDuration(500); m_propertyAnimation->setStartValue(QSize(64,64)); m_propertyAnimation->setEndValue(QSize(74,74)); m_propertyAnimation->start(); QEventLoop loop; QTimer::singleShot(1*600,&loop,&QEventLoop::quit); loop.exec(); m_propertyAnimation->setDuration(500); m_propertyAnimation->setStartValue(QSize(74,74)); m_propertyAnimation->setEndValue(QSize(64,64)); m_propertyAnimation->start(); QTimer::singleShot(1*500,&loop,&QEventLoop::quit); loop.exec();}
        
       
      
     
    
   

widget.cpp

#include "widget.h"#include "ui_widget.h"#include "myonoff.h"#include 
   
    #ifndef OFF#define OFF 1#define ON 0#endifWidget::Widget(QWidget *parent) :    QWidget(parent),    ui(new Ui::Widget){    ui->setupUi(this);    connect(ui->label,static_cast
    
     (&MyOnOff::onoffStatusChanged)            ,this,&Widget::onOffStatus);    setWindowTitle("CSDN IT1995");}Widget::~Widget(){    delete ui;}void Widget::onOffStatus(int status){    if(status==OFF){        qDebug()<<"The switch is off";    }    else{        qDebug()<<"The switch is on";    }}
    
   

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