Get to UIViewController from UIView?

Question

Is there a built-in way to get from a UIView to its UIViewController? I know you can get from UIViewController to its UIView

Answer 1

This doesn't answer the question directly, but rather makes an assumption about the intent of the question.

If you have a view and in that view you need to call a method on another object, like say the view controller, you can use the NSNotificationCenter instead.

First create your notification string in a header file

#define SLCopyStringNotification @"ShaoloCopyStringNotification"

In your view call postNotificationName:

- (IBAction) copyString:(id)sender
{
    [[NSNotificationCenter defaultCenter] postNotificationName:SLCopyStringNotification object:nil];
}

Then in your view controller you add an observer. I do this in viewDidLoad

- (void)viewDidLoad
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(copyString:)
                                                 name:SLCopyStringNotification
                                               object:nil];
}

Now (also in the same view controller) implement your method copyString: as depicted in the @selector above.

- (IBAction) copyString:(id)sender
{
    CalculatorResult* result = (CalculatorResult*)[[PercentCalculator sharedInstance].arrayTableDS objectAtIndex:([self.viewTableResults indexPathForSelectedRow].row)];
    UIPasteboard *gpBoard = [UIPasteboard generalPasteboard];
    [gpBoard setString:result.stringResult];
}

I'm not saying this is the right way to do this, it just seems cleaner than running up the first responder chain. I used this code to implement a UIMenuController on a UITableView and pass the event back up to the UIViewController so I can do something with the data.