Question

I have two view controllers and nibs. I populated one view controller with a toggle switch and declared this in its header file:

@public UISwitch *toggleSwitch;

and exposed it as a property like this:

@property (nonatomic,retain) IBOutlet UISwitch *toggleSwitch;

I also connected the switch with toggleSwitch outlet. Then I used this switch in my other view controller like this :

theViewControllerWhereIDeclaredTheSwitch.toggleSwitch.on = YES;

Though everything worked fine with the switch being ON by default but when I switched off the switch it threw an exception: “Thread 1: signal SIGABRT” in the main.m file. I get this error quite often while working with Xcode, this error is a real pain in my ass. Please help.

Answer 1

You should not share UI elements over multiple UIViewControllers.

A better approach would be to share a BOOL or even encapsulate the state in your own object inheriting from NSObject and pass that between the 2 UIViewControllers.