信号/插槽连接的总数？

Question

有没有办法找到Qt应用程序中信号/插槽连接的总数有人向我介绍伽玛射线，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). [...]

然后使用的情况下断言的连接也存在，这将你的程序崩溃表明一个编程错误：

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。