委托方法未在Tableview中调用

Question

iPadApp：我有两个班TimeTableViewController和MLCViewController在MLCViewController中创建了一个协议，我希望在TimeTableViewController中调用该协议。但delegate(protocol)方法并未调用TimeTableViewController。

这是我的代码......。

在 MLCViewController.h

中

//created protocol

@protocol MLCCancelDelegate;

@protocol MLCCancelDelegate <NSObject>

@optional

-(void)CancelMLCSession;

@end

@property(nonatomic,weak)id <MLCCancelDelegate>Mlcdelegate;

MLCViewController.m

//Which is written in a UIAlertView Delegate method
    switch (buttonIndex) {
        case 0:
        {

            if (self.Mlcdelegate && [self.Mlcdelegate respondsToSelector:@selector(CancelMLCSession)])
            {
                [self.Mlcdelegate CancelMLCSession];
            }

            break;
        }

        default:
            break;
    }

}

在 TimeTableViewController.m

中

//ViewDidLoad
 self.fifthViewController=[[MLCViewController alloc]init];
    fifthViewController.Mlcdelegate = self;

//-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
 UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
                    UIViewController* vc = [storyboard instantiateViewControllerWithIdentifier:@"MLCNote"];


                    pc = [[UIPopoverController alloc] initWithContentViewController:vc];
                    pc.delegate = self;


                    [pc presentPopoverFromRect:rect inView:collectionData
                      permittedArrowDirections:UIPopoverArrowDirectionAny
                                      animated:YES];


//Iam calling that delegate method like

-(void)CancelMLCSession{

    NSLog(@"cancelling");

}

Answer 1

尝试放

self. before fifthViewController.Mlcdelegate = self;

Answer 2

试试这个，

UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
MLCViewController* vc = (MLCViewController *)[storyboard instantiateViewControllerWithIdentifier:@"MLCNote"];
vc.Mlcdelegate = self;
self.fifthViewController = vc;

//rest stuff

Answer 3

添加此代码

UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
                    self.fifthViewController = [storyboard instantiateViewControllerWithIdentifier:@"MLCNote"];
                    pc = [[UIPopoverController alloc] initWithContentViewController:self.fifthViewController];
                    pc.delegate = self;
                    self.fifthViewController.Mlcdelegate=self;