在视图控制器之间传递变量-线程1：信号SIGABRT

Question

I am trying to pass a variable ( tutorID ) to another view controller ( TimetableTableViewController ) but when the code runs the app crashes giving and error message: Thread 1: signal SIGABRT .

I have this inside my TimetableTableViewController.h (the view I'm passing the variable to):

@property (nonatomic, strong) NSString *currentTutorID;

And this inside my prepareForSegue method in the view controller I'm sending the variable from:

NSString *tutorID = @"1";

TimetableTableViewController * timetableTableViewController = [segue destinationViewController];
timetableTableViewController.currentTutorID = tutorID;

If anyone could help me fix this error or give me another way, thank you.

EDIT

The segue is leading to a NavigationViewController so thats why it's crashing. Does anyone know how I can pass the variable to TimetableTableViewController instead of the NavagationViewController .

Answer 1

Strange that you are getting SIGABRT, it should say that your controller not responding to selector tutorID .

Use [segue.destinationViewController topViewController] to get root controller from navigation controller that you want to present.

Answer 2

So the problem is your segue is going in NavigationViewController and TimetableTableViewController is root view controller of it.

In this case [segue destinationViewController] will return NavigationViewController not TimetableTableViewController.

You can try this.

NavigationViewController * nav = [segue destinationViewController];
TimetableTableViewController * timetableTableViewController = nav[0];
timetableTableViewController.currentTutorID = tutorID;

Try this and tell me what you are getting.