Swift: Thread 1 signal SIGABRT

Question

After upgrading Xcode from 5 to 6 beta, almost every project gives me an unexpected error after running the application. There are some other posts with this title but the error

Answer 1

I know there's already plenty of answers but just to note what happened in my case:

I created the ViewController on the storyboard first and then I created the class, I don't know why this was an error because both class names where identical, but by rewriting the class name on the storyboard helped to "link" correctly the view controller and its file. First create file then ViewController on storyboard to prevent this error.

Answer 2

I found this issue happened when I linked @IBOutlet/@IBAction and the linkage broke (renaming for instance). In the main.storyboard inspector, right click (control click) on the elements and delete any bad linkages. Should fix the error if that's the issue.

(Xcode 7)

Answer 3

I'm new to the coding world but resolved the painstacking problem. I was getting the same error by doing something and even though i deleted everything around that i couldn't resolve it. It was still giving me the same error, which meant that it is not deleting in some file it stores. Took me a while to figure out which file, finally when i opened the Mainstoryboard as source file, and did search on the error key word which i knew i changed, it gave me the lines it was sitting in. After deleting those lines error got fixed. I know basic HTML so i knew which lines to delete.

I cannot start my project all over again everytime i have this error so i had to find the solution and there was no solution i could find. So i had to do it myself with common sense, as i said i have no knowledge of coding.

Hope it helps.

Answer 4

fix my problem:

1. Go to deployment info and in "Main interface" select your correct storyboard...
2. Rerun app.

Answer 5

My issues with this started after I installed the legacy simulators (iOS7.1) under 'More Simulators' under the simulator build target. Xcode 6 and its native simulator had been running fine until then. What fixed it for me was to close Xcode, delete Derived Data, and under iOS Simulator in the simulator application choose "Reset Content and Settings" then restart the system.

Answer 6

This error is caused when you have 2 or more of the same IBOutlets or IBActions in your main.storyboard inspector (right arrow key at the very end of your options). Find out where there is double, and delete the one you don't need! It should work perfectly fine after that.