c++ - 信号/槽连接总数？

Question

有没有一种方法可以找到 Qt 应用程序中信号/槽连接的总数有人向我推荐 Gamma 射线，但有没有更简单的解决方案？

Answer 1

检查 Qt::UniqueConnection .

This is a flag that can be combined with any one of the above connection types, using a bitwise OR. When Qt::UniqueConnection is set, QObject::connect() will fail if the connection already exists (i.e. if the same signal is already connected to the same slot for the same pair of objects). [...]

然后在连接已经存在的情况下使用断言，这将使您的程序崩溃并指示编程错误:

QLabel *label = new QLabel;
QLineEdit *lineEdit = new QLineEdit;
auto ok = QObject::connect(lineEdit, &QLineEdit::textChanged,
             label,  &QLabel::setText,
             Qt::UniqueConnection);
Q_ASSERT(ok);

免责声明:未经测试。