QT多线程

1.QT4.7以前的版本-----线程处理方式

1. 出现的警告

直接使用从UI—>转到槽，就会出现警告

2. 出现的错误

error: invalid operands of types 'QTimer*' and 'void (QTimer::*)(QTimer::QPrivateSignal)' to binary 'operator&'

错误:无效的操作数类型’QTimer*'和’void (QTimer:)(QTimer::QPrivateSignal)‘到二进制’operator&’

忘记在函数参数中加入逗号

connect(myTimer,&QTimer::timeout,this,&Widget::dealTimerout);

3.多线程编程

3.1创建线程类

4.多线程测试案例

.pro

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    widget.cpp

HEADERS += \
    widget.h

FORMS += \
    widget.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

.widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include 
#include 
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();


    //定义定时器槽函数
    void dealTimerout();



private slots:


    void on_bthStart_clicked();

private:
    Ui::Widget *ui;
    QTimer *myTimer;//声明一个定时器变量

};
#endif // WIDGET_H