Qt 如何使用 lambda 表达式连接信号和槽？

connect(camera, static_cast<void(QCamera::*)(QCamera::LockStatus, QCamera::LockChangeReason)>(&QCamera::lockStatusChanged),

      [=](QCamera::LockStatus status, QCamera::LockChangeReason reason){ /* ... */ });

static_cast<void(QCamera::*)(QCamera::LockStatus, QCamera::LockChangeReason)>(&QCamera::lockStatusChanged)

上面这句是一个静态转换 static_cast<>()

QCamera::* 是类指针

QCamera::LockStatus 函数参数

QCamera::LockChangeReason 函数参数

&QCamera::lockStatusChanged 函数地址