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POUnrecognized selector sent to instance error from Utility App navigation controller view
 

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  1. POUnrecognized selector sent to instance error from Utility App navigation controller view
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    <p>I have a utility app. I've implemented this code on the flipside, which calls a Feedback view to send an email, like this <a href="http://www.iostipsandtricks.com/using-apples-mail-composer/" rel="nofollow noreferrer">tutorial</a>. This works, but then when I click on the Send Feedback UIButton, my app immediately crashes with <code>*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController sendMail]: unrecognized selector sent to instance 0x89c1960'.</code></p> <p>I've checked these things:</p> <p>I've declared the delegate properly and implemented it for the MailComposer.</p> <p>My method, sendMail, is wired to the TouchUp Event for the button.</p> <p>My method names agree:</p> <pre><code>- (IBAction)sendMail; </code></pre> <p>and</p> <pre><code>- (IBAction)sendMail { if ([MFMailComposeViewController canSendMail]) { MFMailComposeViewController *mfViewController = [[MFMailComposeViewController alloc] init]; mfViewController.mailComposeDelegate = self; [self presentModalViewController:mfViewController animated:YES]; } else { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Status:" message:@"Your phone is not currently configured to send mail." delegate:nil cancelButtonTitle:@"ok" otherButtonTitles:nil]; [alert show]; } </code></pre> <p>}</p> <p>The code doesn't event get to this method because I have a breakpoint set at the top of the method implementation but doesn't get called. Nor did a breakpoint at ViewDidLoad get activated.</p> <p>Looking at this error closely:</p> <pre><code>reason: '-[UIViewController sendMail]: unrecognized selector sent to instance </code></pre> <p>it seems it is expecting a view controller named sendMail rather than a method. I read this <a href="https://stackoverflow.com/questions/5843217/unrecognized-selector-sent-to-instance">post</a> which seems very similar but I dont' see any other view controller names in the xib Identity drop down list. I think this is part of my problem but I'm not sure how to fix it.</p> <p>Maybe I'm supposed to be presenting the MFMailComposer via a viewcontroller? If so, I'm not sure how to do that.</p> <p>Any suggestions would be appreciated.</p>
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