Qt状态机QStateMachine使用

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建立一个空的Qt工程添加main.cpp

#include <QApplication>#include <QPushButton>#include <QState>#include <QStateMachine>int main(int argc, char* argv[]){    QApplication app(argc, argv);    QPushButton button("state machine");    QStateMachine machine;    //新建三个状态机    QState* s1 = new QState(&machine);    QState* s2 = new QState(&machine);    QState* s3 = new QState(&machine);    //设定三个状态分别控制button在不同的位置显示    s1->assignProperty(&button, "geometry", QRect(100, 100, 100, 50));    s2->assignProperty(&button, "geometry", QRect(300, 100, 100, 50));    s3->assignProperty(&button, "geometry", QRect(200, 200, 100, 50));    //关联三个状态间的切换    s1->addTransition(&button, SIGNAL(clicked()), s2);    s2->addTransition(&button, SIGNAL(clicked()), s3);    s3->addTransition(&button, SIGNAL(clicked()), s1);    // entred为进入 exited离开 还可以有finished propertiesAssigned destroyed    //QObject::connect(s3, SIGNAL(entered()), &button, SLOT(showMinimized()));    //设置起始状态    machine.setInitialState(s1);    machine.start();    button.show();    return app.exec();}

运行后，每点击一次按钮将移至下一个位置

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