Thread 1: signal SIGABRT Error


I am working on the iTahDoodle app in Chapter 31. The app doesn’t give an build errors and loads up fine. I can enter a task but when I press the “insert” button, the app stops and gives me the error “Thread 1: signal SIGABRT” in my main.m file.

This did NOT occur when I first ran the app when the tasks would only display in the log. It started after I entered the code to display the tasks in the table.

I can assure you that I’ve gone through the code line by line very closely.

Any help is appreciated.


I have exactly the same fail point, I have double checked code but can’t find any error. Very frustrating. Up until wiring up the table view everything worked great.

Can any one advise what a SIGABRT Error means.


Solved the problem finally found the typo, hard to spot as no warnings given

BNRAppDelegate.m for part of code where Tell table class to instantiate i.e.

//Tell the table view which class to instantiate whenever it needs to create a new cell [self.taskTable registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];

I had inaccurately put @“cell”

so later on when in Table view management section, when the UITableViewCell method called e.g.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { //to improve performance, this methos first checks //for an existing cell object that we can reuse //if there isn't one then a new cell created UITableViewCell *c = [self.taskTable dequeueReusableCellWithIdentifier:@"Cell"];

the @“Cell” was not matching the incorrect @“cell” above and the program fell over.

Nearly took as long to find the error as to do all the coding…got to love debugging!!

Thanks! I made the same typo.