调用cellForRowAtIndexPath但没有stacktrace

Question

Using Swift 3, the UITableView's func tableView(_ tableView: UITableView, cellForRowAt indexPath: @autoclosure @escaping IndexPath) -> UITableViewCell is being called. I want to track who's calling this function. As far as I know, this will only be called if there's a need for a cell to display. However, in stacktrace override internal func tableView(_ tableView: UITableView, numberOfRowsInSection section: @autoclosure @escaping Int) -> Int is not called and there is no stacktrace. Could someone advice to where to start digging up? Thanks!

See attached screenshot

Answer 1

By default, you only see the stack trace that contains debug symbols. So you won't see many framework internals here.

To see everything , there is a small button at the bottom of the stack trace window, third position from the right, that will enable also methods without debug symbols:

(In fact, it depends on your Xcode version; in older versions there is some sort of slider which will display more or less details in the stack trace).

Answer 2

As @AndreasOetjen mentioned, this is a normal behavior because the method get's called from a UIKit Framework class. The call-stack in this Framework is hidden by default and can be opt-io by the mentioned buttons.