一、期望的效果：

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3.1 widget.h

#ifndef WIDGET_H #define WIDGET_H#include #include #include #include #include #include namespace Ui { class Widget; }class Widget : public QWidget { Q_OBJECTpublic: explicit Widget(QWidget *parent = 0); ~Widget(); private: Ui::Widget *ui; QScrollBar *m_scrollBarV; protected: bool eventFilter(QObject *obj, QEvent *event); }; #endif // WIDGET_H

3.2 widget.cpp

#include "widget.h" #include "ui_widget.h"Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); m_scrollBarV = ui->tableWidget->verticalScrollBar(); QObjectList objectList = ui->tableWidget->children(); for(int i = 0; i < objectList.count(); i++) { if(objectList.at(i)->objectName() == "qt_scrollarea_viewport") { objectList.at(i)->installEventFilter(this); } } }Widget::~Widget() { delete ui; }bool Widget::eventFilter(QObject *obj, QEvent *event) { static int press_y= 0; static int move_y= -1; static int release_y = 0; static QDateTime pressDateTime; static QPropertyAnimation *animation = new QPropertyAnimation(); if("qt_scrollarea_viewport" != obj->objectName()) { return false; }int scrollV_max = m_scrollBarV->maximum (); int scrollV_min = m_scrollBarV->minimum (); //根据鼠标的动作——按下、放开、拖动，执行相应的操作 if(event->type() == QEvent::MouseButtonPress) { //记录按下的时间、坐标pressDateTime = QDateTime::currentDateTime(); move_y= QCursor::pos().y(); press_y = move_y; animation->stop(); } else if(event->type() == QEvent::MouseButtonRelease) { //鼠标放开，根据鼠标拖动的垂直距离和持续时间，设置窗口滚动快慢程度和距离if(animation->targetObject() != m_scrollBarV) { animation->setTargetObject(m_scrollBarV); animation->setPropertyName("value"); }move_y = -1; release_y = QCursor::pos().y(); //qDebug()<<"MouseButtonRelease QCursor::pos().y()="<parent(); if(parent_obj != 0 || parent_obj->inherits("QAbstractItemView")) { QTimer::singleShot(150, (QAbstractItemView *)parent_obj , SLOT(clearSelection())); }int endValue; int pageStep; if(release_y - press_y != 0 && qAbs(release_y - press_y) > 45) { //qDebug()<<"obj->objectName()="<objectName(); int mseconds = pressDateTime.msecsTo(QDateTime::currentDateTime()); //qDebug()<<"mseconds="<pageStep(); //qDebug()<<"pageStep="<【Qt模仿Android、IOS滑动窗口效果】 limit)//滑动的时间大于某个值的时候，不再滚动(通过增加分母) { mseconds = mseconds + (mseconds - limit) * 20; }if(release_y - press_y > 0) { endValue = https://www.it610.com/article/m_scrollBarV->value() - pageStep * (200.0 / mseconds); //.0避免避免强制转换为整形 if(scrollV_min > endValue) { endValue = scrollV_min; } } else if(release_y - press_y < 0) { endValue = https://www.it610.com/article/m_scrollBarV->value() + pageStep * (200.0 / mseconds); if(endValue > scrollV_max) { endValue = https://www.it610.com/article/scrollV_max; } } if(mseconds> limit) { mseconds = 0; //滑动的时间大于某个值的时候，滚动距离变小，减小滑动的时间 } animation->setDuration(mseconds+550); animation->setEndValue(endValue); animation->setEasingCurve(QEasingCurve::OutQuad); animation->start(); return true; } } else if(event->type() == QEvent::MouseMove && move_y >= 0) { //窗口跟着鼠标移动int move_distance = QCursor::pos().y() - move_y; int endValue = https://www.it610.com/article/m_scrollBarV->value() - move_distance; if(scrollV_min > endValue) { endValue = https://www.it610.com/article/scrollV_min; }if(endValue> scrollV_max) { endValue = https://www.it610.com/article/scrollV_max; } m_scrollBarV->setValue(endValue); //qDebug()<<"endValue="https://www.it610.com/article/<