Iphone 关于在iOS中将数据传递给代理的问题

所以我有一个tableview作为根屏幕，还有一个add按钮，它显示一个新的屏幕，这个屏幕有一个日期选择器。当我呈现新视图时，我将根屏幕设置为委派

现在，我需要将数据从uidatepicker屏幕传递回其代理，但我不记得该如何工作

我知道我应该能够从新的datepicker视图中调用根屏幕中存在的方法，但同样，我记不起语法

我知道我以前做过，但我已经有一段时间没有用可可了，我只是想回忆一下

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谢谢你的帮助

这应该足以刷新您的记忆

MyDatePickerViewController.h：

@protocol MyDatePickerViewControllerDelegate;

@interface MyDatePickerViewController;

MyDatePickerViewController : UIViewController
{
    id<MyDatePickerViewControllerDelegate> delegate;

    NSDate* selectedDate;
}

@property (nonatomic, assign) id<MyDatePickerViewControllerDelegate> delegate;
@property (nonatomic, retain) NSDate* selectedDate;

@end

@protocol MyDatePickerViewControllerDelegate
- (void)myDatePickerViewControllerDidFinish:(MyDatePickerViewController*)myDatePickerViewController;
@end

#import MyDatePickerViewController

@interface MyRootViewController : UIViewController <MyDatePickerViewControllerDelegate>
{
    ...
}

@end

MyRootViewController.h：

@protocol MyDatePickerViewControllerDelegate;

@interface MyDatePickerViewController;

MyDatePickerViewController : UIViewController
{
    id<MyDatePickerViewControllerDelegate> delegate;

    NSDate* selectedDate;
}

@property (nonatomic, assign) id<MyDatePickerViewControllerDelegate> delegate;
@property (nonatomic, retain) NSDate* selectedDate;

@end

@protocol MyDatePickerViewControllerDelegate
- (void)myDatePickerViewControllerDidFinish:(MyDatePickerViewController*)myDatePickerViewController;
@end

#import MyDatePickerViewController

@interface MyRootViewController : UIViewController <MyDatePickerViewControllerDelegate>
{
    ...
}

@end