摘要：
在编译之后，将不同模式编译下的dll文件放入程序编译后的文件夹中，才能正常运行程序。
1.修改配置文件
1 #TEMPLATE =app
2
3 DEFINES +=CUSTOMMESSAGEBOX_LIBRARY
4 TEMPLATE = lib2.在导出类的头文件上加如下代码
1 #if defined(CUSTOMMESSAGEBOX_LIBRARY)
2 # define CUSTOMMESSAGEBOXSHARED_EXPORT Q_DECL_EXPORT
3 #else
4 # define CUSTOMMESSAGEBOXSHARED_EXPORT Q_DECL_IMPORT
5 #endif3.修改导出类定义
1 //class CustomMessageBox : public QDialog
2 class CUSTOMMESSAGEBOXSHARED_EXPORT CustomMessageBox : public QDialog4.编译
若是MinGW32编译器，在编译之后会在文件夹下找到***.dll和***.a文件；若是MSVC编译器，则应该是***.dll和***.lib。
5.使用
在使用该库的程序中，新建一个include文件夹，将***.a文件 和导出类的头文件复制进这个文件夹，在程序中引入该头文件即可。在编译之后，将不同模式编译下的dll文件放入程序编译后的文件夹中，才能正常运行程序。
6.简单案例
custommessagebox.pro
1 #-------------------------------------------------
2 #
3 # Project created by QtCreator 2020-03-07T22:37:05
4 #
5 #-------------------------------------------------
6
7 QT +=core gui
8
9 greaterThan(QT_MAJOR_VERSION, 4): QT +=widgets
10
11 TARGET =custommessagebox
12 #TEMPLATE =app
13
14 DEFINES +=CUSTOMMESSAGEBOX_LIBRARY
15 TEMPLATE =lib
16
17 # The following define makes your compiler emit warnings ifyou use
18 # any feature of Qt which as been marked asdeprecated (the exact warnings
19 # depend on your compiler). Please consult the documentation of the
20 # deprecated API in order to know how to port your code away fromit.
21 DEFINES +=QT_DEPRECATED_WARNINGS
22
23 # You can also make your code fail to compile ifyou use deprecated APIs.
24 # In order to doso, uncomment the following line.
25 # You can also selectto disable deprecated APIs only up to a certain version of Qt.
26 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
27
28
29 SOURCES +=30 custommessagebox.cpp
31 # main.cpp
32
33 HEADERS +=34 custommessagebox.h
35
36 FORMS +=37 custommessagebox.ui
38
39 RESOURCES +=40 resources.qrccustommessagebox.h
1 #ifndef CUSTOMMESSAGEBOX_H
2 #define CUSTOMMESSAGEBOX_H
3
4 #if defined(CUSTOMMESSAGEBOX_LIBRARY)
5 # define CUSTOMMESSAGEBOXSHARED_EXPORT Q_DECL_EXPORT
6 #else
7 # define CUSTOMMESSAGEBOXSHARED_EXPORT Q_DECL_IMPORT
8 #endif
9
10 #include <QDialog>
11
12 namespaceUi {
13 classCustomMessageBox;
14 }
15
16 //class CustomMessageBox : public QDialog
17 class CUSTOMMESSAGEBOXSHARED_EXPORT CustomMessageBox : publicQDialog
18 {
19 Q_OBJECT
20
21 public:
22 explicit CustomMessageBox(QWidget *parent = 0);
23 ~CustomMessageBox();
24
25 void setMessage(const QString msg, inttype);
26
27 voidtest();
28
29 privateslots:
30 voidon_btnOk_clicked();
31
32 private:
33 Ui::CustomMessageBox *ui;
34
35 void initStyle(); //初始化无边框窗体
36
37 void moveFormToCenter(); //窗体居中显示
38 };
39
40 #endif //CUSTOMMESSAGEBOX_Hcustommessagebox.cpp
1 #include "custommessagebox.h"
2 #include "ui_custommessagebox.h"
3
4 #include <QDesktopWidget>
5 #include <QDebug>
6
7 CustomMessageBox::CustomMessageBox(QWidget *parent) :
8 QDialog(parent),
9 ui(newUi::CustomMessageBox)
10 {
11 ui->setupUi(this);
12 this->initStyle();
13 this->moveFormToCenter();
14 }
15
16 CustomMessageBox::~CustomMessageBox()
17 {
18 deleteui;
19 }
20
21 void CustomMessageBox::setMessage(const QString msg, inttype)
22 {
23 switch(type) {
24 case 1:
25 {
26 ui->labIcoMain->setStyleSheet("border-image: url(:/images/image/msg_question.png);");
27 ui->lab_Title->setText("询问");
28 break;
29 }
30 case 2:
31 {
32 ui->labIcoMain->setStyleSheet("border-image: url(:/images/image/msg_error.png);");
33 ui->btnCancel->setVisible(false);
34 ui->lab_Title->setText("错误");
35 break;
36 }
37 default:
38 {
39 ui->labIcoMain->setStyleSheet("border-image: url(:/images/image/msg_info.png);");
40 ui->btnCancel->setVisible(false);
41 ui->lab_Title->setText("提示");
42 break;
43 }
44 }
45 ui->labInfo->setText(msg);
46 this->setWindowTitle(ui->lab_Title->text());
47 }
48
49 voidCustomMessageBox::test()
50 {
51 qDebug() << "测试是否可以输出";
52 }
53
54 voidCustomMessageBox::initStyle()
55 {
56 QFont localFont = this->font();
57 localFont.setPointSize(10);
58 localFont.setFamily("Microsoft YaHei");
59 this->setFont(localFont);
60 this->setWindowTitle(ui->lab_Title->text());
61 //设置窗体标题栏隐藏
62 this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowSystemMenuHint |Qt::WindowMinimizeButtonHint);
63 //设置图标
64 ui->lab_Ico->setStyleSheet("border-image: url(:/images/image/home.png);");
65 ui->btnMenu_Close->setIcon(this->style()->standardIcon(QStyle::SP_TitleBarCloseButton));
66 //关联关闭按钮
67 connect(ui->btnMenu_Close, SIGNAL(clicked()), this, SLOT(close()));
68 connect(ui->btnCancel, SIGNAL(clicked()), this, SLOT(close()));
69 }
70
71 voidCustomMessageBox::moveFormToCenter()
72 {
73 int width = this->width();
74 int height = this->height();
75 QDesktopWidget dwt;
76 int deskWidth =dwt.availableGeometry().width();
77 int deskHeight =dwt.availableGeometry().height();
78 QPoint movePoint(deskWidth / 2 - width / 2, deskHeight / 2 - height / 2);
79 this->move(movePoint);
80 }
81
82 voidCustomMessageBox::on_btnOk_clicked()
83 {
84 done(1);
85 this->close();
86 }custommessagebox.ui
省略
调用
1 voidWidget::on_btnMeesageBox_clicked()
2 {
3 CustomMessageBox messageBox;
4 messageBox.setMessage("调用成功", 1);
5 messageBox.exec();
6 }