在关闭ipad中的ModalView后调用MasterView中的函数

Question

我正在使用iPad的Master-Detail模板。我有一个视图控制器，我想模态显示，所以我用这个代码

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];  
     m_ViewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil]; 
     m_ViewController.modalPresentationStyle = UIModalPresentationFormSheet; 

     [appDelegate.splitViewController presentModalViewController:m_ViewController animated:YES]; 

能正常工作和视图控制器有模式加载，现在我试图关闭此视图控制器，所以里面ViewController.m，我叫这行代码

[self dismissModalViewControllerAnimated:YES]; 

此代码也能正常工作和视图控制器被驳回，但驳回后，我想调用一个函数在我马西德威。怎么做？

根据与Moxy的讨论添加的代码。

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]; 
     [appDelegate.testViewController testfunction:testImage]; 

Answer 1

正如amit3117指出的那样，您应该使用委托。 协议应该至少用一种方法来定义，该方法可以与委托人沟通，以模态方式呈现的视图控制器完成其工作。

@class ViewController; 

@protocol MyViewControllerDelegate <NSObject> 

-(void)viewControllerDidFinish:(ViewController *)sender; 

@end 

编辑：我忘了补充一点，你应该对委托的ViewController

@interface ViewController : UIViewController 

@property (nonatomic, weak) id <MyViewControllerDelegate> delegate; 

@end 

的公共属性，您可以使用您的主视图控制器为委托。因此，在您的主视图控制器的实现还需要有：

@interface MyMasterViewController() <MyViewControllerDelegate> 
@end 

@implementation MyMasterViewController 

-(void)showViewController 
{ 
    m_ViewController = [[ViewController alloc] initWithNibName:@"ViewController" 
                 bundle:nil]; 
    m_ViewController.modalPresentationStyle = UIModalPresentationFormSheet; 
    m_ViewController.delegate = self; 
    // –presentModalViewController:animated: is deprecated! 
    [self.parentViewController presentViewController:m_ViewController 
              animated:YES 
              completion:nil]; 
} 

-(void)viewControllerDidFinish:(ViewController *)sender 
{ 
    // Add any code you want to execute before dismissing the modal view controller 
    // –dismissModalViewController:animated: is deprecated! 
    [self.parentViewController dismissViewControllerAnimated:YES 
                completion:^{ 
                // code you want to execute after dismissing the modal view controller 
                }]; 
} 
@end 

当m_ViewController完成其工作，它应该叫：

[self.delegate viewControllerDidFinish:self];