从DetailViewController发送数据到MasterViewController

Question

这正是我正在尝试做的。

wizardviewcontroller.m

- (IBAction)onCountryClick:(id)sender { 
    MJDetailViewController *detailViewController = [[MJDetailViewController alloc] initWithNibName:@"MJDetailViewController" bundle:nil]; 
    [self presentPopupViewController:detailViewController animationType:MJPopupViewAnimationSlideLeftRight]; 
} 

用户点击按钮全国弹出一个显示了名单。

当用户选择一个行按钮标题应该改变。

这是我的DetailView，

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath: (NSIndexPath  *)indexPath { 

    WizardViewController *mj = [[WizardViewController alloc]  initWithNibName:@"WizardViewController" bundle:nil]; 
    mj.countryselected = [countryNames objectAtIndex:indexPath.row]; 
    [mj.countryButton setTitle:mj.countryselected forState:UIControlStateNormal]; 
    [self dismissPopupViewControllerWithanimationType:MJPopupViewAnimationFade]; 
} 

DetailViewController被解雇，但countryButtonTitle没有更新。我知道这是因为wizardview并不令人耳目一新。我想知道在这种情况下正确的解决方法。

希望这有助于得到更好的答案。在MJDetailViewController

@protocol MJDetailViewControllerDelegate; 
@interface MJDetailViewController : UIViewController 
@property (nonatomic,assign) id< MJDetailViewControllerDelegate> delegate; 
@end 


@protocol MJDetailViewControllerDelegate <NSObject> 

- (void)selectedContry:(NSString *)title; 

@end 

Answer 1

制作协议，并呼吁像

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath: (NSIndexPath  *)indexPath { 

    NSString *title = [countryNames objectAtIndex:indexPath.row]; 
     if ([self.delegate respondsToSelector:@selector(selectedContry:)]) { 
      [self.delegate selectedContry:title]; 
     } 
    [self dismissPopupViewControllerWithanimationType:MJPopupViewAnimationFade]; 
} 

添加MJDetailViewControllerDelegate为在WizardViewController.h）

现在实现selectedContry:方法WizardViewController.m，如：

- (void)selectedContry:(NSString *)title 
{ 
    [self.countryButton setTitle:title forState:UIControlStateNormal]; 
} 

希望它可以帮助你。