ui->setupUi(this);
    //1. 使用本地文件：ui->actionasdasdas->setIcon(QIcon("本地绝对路径"));
    ui->actiona1->setIcon(QIcon("C:/Users/满满/Desktop/output/picture/1.jpg"));
    //2. 使用资源文件：ui->actionasdasdas->setIcon(QIcon(":+前缀+文件名"));
    ui->actiona1->setIcon(QIcon(":/picture/5.jpg"));