本文章主要学习QSlider样式

准备下面几张背景图片：

调小图标、调大图标、QSlider位置图标

QSlider划过的背景图标、QSlider未划过的背景图标

最终效果图

自己创建一个QSlider工程，此处省略……

编写mainwindow.h文件

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3  
 4 #include <QMainWindow>
 5 #include <QSlider>
 6 #include <QPushButton>
 7  
 8  
 9 class MainWindow : public QMainWindow
10 {
11     Q_OBJECT
12     
13 public:
14     explicit MainWindow(QWidget *parent = 0);
15 private slots:
16     void    BtnLeftClick();
17     void    BtnRightClick();
18 private:
19     QSlider     *pQSlider;
20 };
21  
22 #endif // MAINWINDOW_H

编写mainwindow.cpp文件

 1 #include "mainwindow.h"
 2  
 3 MainWindow::MainWindow(QWidget *parent) :
 4     QMainWindow(parent)
 5 {
 6     this->resize(QSize(360,90));
 7     this->setStyleSheet("background-color:rgb(43,45,55);border:none;");
 8  
 9     QPushButton *pBtnL      = new QPushButton(this);
10     QPushButton *pBtnR      = new QPushButton(this);
11     pQSlider   = new QSlider(Qt::Horizontal,this);
12  
13     pBtnL->setGeometry(30,24,32,34);
14     pQSlider->setGeometry(70,20,220,40);
15     pBtnR->setGeometry(300,20,32,34);
16  
17  
18     pBtnL->setStyleSheet("outline:none;border-image: url(:/btn_del.png)");
19     pBtnR->setStyleSheet("outline:none;border-image: url(:/btn_add.png)");
20  
21     //设置不可用,不可滑动
22     pQSlider->setEnabled(false);
23     pQSlider->setStyleSheet("QSlider::groove:horizontal{ \
24                                                     height: 12px; \
25                                                     left: 5px; \
26                                                     right: 5px; \
27                                                     border-image: url(:/qslider_bg.png);\
28                                                   } \
29                                     QSlider::handle:horizontal{ \
30                                                     border-radius: 20px; \
31                                                     width:  40px; \
32                                                     height: 40px; \
33                                                     margin-top: -10px; \
34                                                     margin-left: -10px; \
35                                                     margin-bottom: -20px; \
36                                                     margin-right: -10px; \
37                                                     border-image:url(:/qslider_btn.png);} \
38                                     QSlider::sub-page:horizontal{border-image: url(:/qslider.png);}");
39  
40  
41     //设置最小值、最大值
42     pQSlider->setMinimum(0);
43     pQSlider->setMaximum(16);
44  
45     //设置初始值
46     pQSlider->setValue(4);
47  
48     //关联信号槽
49     connect(pBtnL,SIGNAL(clicked()),this,SLOT(BtnLeftClick()));
50     connect(pBtnR,SIGNAL(clicked()),this,SLOT(BtnRightClick()));
51 }
52  
53 void MainWindow::BtnLeftClick()
54 {
55     if(pQSlider->value() > 0)
56     {
57         pQSlider->setValue(pQSlider->value()-1);
58     }
59 }
60  
61 void MainWindow::BtnRightClick()
62 {
63     if(pQSlider->value() < 16)
64     {
65         pQSlider->setValue(pQSlider->value()+1);
66     }
67 }

编写main.cpp文件

 1 #include "mainwindow.h"
 2 #include <QApplication>
 3  
 4 int main(int argc, char *argv[])
 5 {
 6     QApplication a(argc, argv);
 7     MainWindow w;
 8     w.show();
 9     
10     return a.exec();
11 }