标签：练习 指正 label 定时器 理想 qpi com pix code
最近练习Qt，需要一个飞机在屏幕上画五边形。虽然达到的效果不是非常的理想，但是勉强还是达到了效果，欢迎大家指正。用到的飞机图片如下。
第一步：初始化，在构造函数里面，把图片向左旋转18°
// 向左旋转18°
matrix.rotate(-18);
ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation));
第二步：在定时器里面执行如下代码
switch(flag) { case 1: { if (num == 10) { num = 0; flag = 2; matrix.rotate(72); ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation)); } int x = ui.label->x() - 8; int y = ui.label->y() - 10; ui.label->move(x, y); num++; break; } case 2: { if (num == 10) { num = 0; flag = 3; matrix.rotate(72); ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation)); } int x = ui.label->x() + 15; int y = ui.label->y() - 10; ui.label->move(x, y); num++; break; } case 3: { if (num == 10) { num = 0; flag = 4; matrix.rotate(72); ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation)); } int x = ui.label->x() + 15; int y = ui.label->y() + 10; ui.label->move(x, y); num++; break; } case 4: { if (num == 10) { num = 0; flag = 5; matrix.rotate(72); ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation)); } int x = ui.label->x() - 8; int y = ui.label->y() + 10; ui.label->move(x, y); num++; break; } case 5: { if (num == 10) { num = 0; flag = 1; matrix.rotate(72); ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation)); } int x = ui.label->x() - 14; int y = ui.label->y(); ui.label->move(x, y); num++; break; } default: { break; } }
标签：练习 指正 label 定时器 理想 qpi com pix code
原文地址：https://www.cnblogs.com/duxie/p/11781279.html
