iPhone sdk中的ARC问题

Question

i am checking a sample project from github an i got this error,,in one of the class,,there are many classes in it,,but i got door in this class only.the error is "receiver type view controller for instance message does not declare a method with selector 'loadChapter:forBook'

the error came in this method,

- (void)displayBook: (int)theBook andChapter: (int)theChapter andVerse: (int)theVerse
{

    [((PKRootViewController *)self.parentViewController.parentViewController ) showWaitingIndicator];
    PKWait(//here i got this error
           [self loadChapter:theChapter forBook:theBook];
           //[self.tableView reloadData];
           [self reloadTableCache];
           [(PKHistory *)[PKHistory instance] addPassagewithBook:theBook andChapter:theChapter andVerse:theVerse];
           [self notifyChangedHistory];
           ((PKSettings *)[PKSettings instance]).topVerse = theVerse;
           if (theVerse>1)
           {
               [self.tableView scrollToRowAtIndexPath: [NSIndexPath indexPathForRow:theVerse-1 inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:NO];
           }
           else 
           {
               [self.tableView scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:NO];
           }
           UITabBarController *tbc = (UITabBarController *)self.parentViewController.parentViewController;
           tbc.selectedIndex = 0;
           );
}

and also this method have also this error

 - (void)loadChapter: (int)theChapter forBook: (int)theBook
    {
        // clear selectedVerses
        selectedVerses = [[NSMutableDictionary alloc] init];
        PKSettings *theSettings = [PKSettings instance];
        theSettings.currentBook = theBook;
        theSettings.currentChapter = theChapter;
        //[theSettings saveCurrentReference]; -- removed for speed
        [self loadChapter];//here i got the error,,in this case after selector'loadChapter;
    }

what is the reason for this error,,in error showing window it shows,automaticReferenceCounting Issue

Answer 1

do you have a selector loadChapter without parameters?

aslo check if their declaration is included in interface file or not

Answer 2

The error receiver type view controller for instance message does not declare a method with selector 'loadChapter:forBook' means that the compiler can't found the method loadChapter:forBook: on the interface declaration of self . The same think happens on the other error, but with the method loadChapter . So the problem probably is that you have forgot to declare the methods on the interface, or maybe that you have declare two methods with the same name.