Question

I have an issue running an app on a simulator.
The problem:

EXC_BAD_ACCESS occurring at objc_msgSend in Thread 1.

Screenshot :

In my Application, I have multiple ViewController. when I click on back button of UINavigationBar then this type of issue is generated, I can’t explain my problem because all the functionality works properly.

Example :-

1 – fitstVController (work properly)

=> it have UITableView, when I click on specific row then it will go on another UIViewController (SecoundViewController)

2 – SecoundViewController (work properly)

=> it have UITableView and UIActionSheet. when I select button of UiActionSheet then another UIViewController (ThirdViewController) is open

3 – ThirdViewController (work properly)

=> it have UITableView and multiple UIPickerView. But HERE IS PROBLEM THAT I CAN’T GO BACK AT PREVIOUS UIViewController (SecoundViewController).
=> when i do that then EXC_BAD_ACCESS (Code = 1, address = 0x30000008) issue generated.

Answer 1

In short, this type of problem occurs when you release the memory assigned to an object that has been already released. Most likely, this type of issue is generated when you go back to your previous UIViewController (or other cases).

And also, I suggest reading the following link for a more thorough explanation:

Hamster Emporium archive:So you crashed in objc_msgSend()