qt实现樱花飞舞效果（qt实现樱花飞舞效果）

本文实例为大家分享了Qt实现樱花飞舞效果的具体代码，供大家参考，具体内容如下

应女友要求，使用Qt做了一个在电脑桌面樱花飞舞的小程序。这里面用到了Qt动画效果QPropertyAnimation类来控制飞舞效果。使用label加载樱花图案。大概的核心代码如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 Widget::Widget(QWidget *parent) : QWidget(parent), timer(new QTimer(this)), pixmap(new QPixmap(":/cherry.png")), ui(new Ui::Widget) { ui->setupUi(this); setWindowFlags(Qt::FramelessWindowHint | windowFlags()); //去除窗体标题 this->resize(qApp->desktop()->availableGeometry().size()); this->setAttribute(Qt::WA_TranslucentBackground, true); //设置背景透明 this->setAutoFillBackground(true); this->setWindowFlags(this->windowFlags() | Qt::WindowStaysOnTopHint); //窗口总在最顶层 connect(timer,SIGNAL(timeout()),this,SLOT(start())); QPixmap *pixmap = new QPixmap(":/cherry.png"); pixmap->scaled(ui->label->size(), Qt::KeepAspectRatio); pixmaps.append(pixmap); pixmap = new QPixmap(":/cherry2.png"); pixmap->scaled(ui->label->size(), Qt::KeepAspectRatio); pixmaps.append(pixmap); pixmap = new QPixmap(":/cherry3.png"); pixmap->scaled(ui->label->size(), Qt::KeepAspectRatio); pixmaps.append(pixmap); pixmap = new QPixmap(":/cherry4.png"); pixmap->scaled(ui->label->size(), Qt::KeepAspectRatio); pixmaps.append(pixmap); pixmap = new QPixmap(":/cherry5.png"); pixmap->scaled(ui->label->size(), Qt::KeepAspectRatio); pixmaps.append(pixmap); creatLabels(); createAnimation(); timer->start(1000); } //批量创建樱花标签 void Widget::creatLabels() { for(int i = 0; i < cherryNums;i++) { QLabel *label = new QLabel(this); label->setScaledContents(true); label->setPixmap(*pixmaps[i%pixmaps.size()]); label->setAttribute(Qt::WA_TranslucentBackground, true); label->resize(0,0); labs.append(label); } } //批量创建樱花动画 void Widget::createAnimation() { if(labs.empty()) return; QVector<int> rnds = generateRandomNumber(labs.size()*2); for(int i = 0;i < labs.size();i++) { QPropertyAnimation *ani = new QPropertyAnimation(this); ani->setTargetObject(labs[i]); ani->setPropertyName("geometry"); ani->setDuration(10000); ani->setLoopCount(-1); //无限循环 ani->setStartValue(QRect(rnds[i*2],0,200,60)); ani->setEndValue(QRect(rnds[2*i+1],this->height()-50,200,60)); animations.append(ani); } }