How to check if a view controller can perform a segue

Question

This might be a very simple question but didn't yield any results when searching for it so here it is...

I am trying to work out a way to check if a certain view controller can perform a segue with identifier XYZ before calling the performSegueWithIdentifier: method.

Something along the lines of:

if ([self canPerformSegueWithIdentifier:@"SegueID"])     [self performSegueWithIdentifier:@"SegueID"]; 

Possible?

Answer 1

To check whether the segue existed or not, I simply surrounded the call with a try-and-catch block. Please see the code example below:

@try {     [self performSegueWithIdentifier:[dictionary valueForKey:@"segue"] sender:self]; } @catch (NSException *exception) {     NSLog(@"Segue not found: %@", exception); } 

Hope this helps.

Answer 2

- (BOOL)canPerformSegueWithIdentifier:(NSString *)identifier {     NSArray *segueTemplates = [self valueForKey:@"storyboardSegueTemplates"];     NSArray *filteredArray = [segueTemplates filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"identifier = %@", identifier]];     return filteredArray.count>0; }