Question

我需要在viewcontroller中调用一个方法，该方法从创建的popupviewcontroller创建一个popupviewcontroller。

对于iPad，我这样创建：

if (!self.flipsidePopoverController) {
    FlipsideViewController *controller = [[[FlipsideViewController alloc] initWithNibName:@"FlipsideViewController" bundle:nil] autorelease];
    controller.delegate = self;
    self.flipsidePopoverController = [[[UIPopoverController alloc] initWithContentViewController:controller] autorelease];
}
if ([self.flipsidePopoverController isPopoverVisible]) {
    [self.flipsidePopoverController dismissPopoverAnimated:YES];
}
else
{
    /// The important part ///
    [self.flipsidePopoverController presentPopoverFromRect:CGRectMake((self.view.frame.size.width-320), 0, (self.view.frame.size.width), 10) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
}

现在我希望在弹出窗口中调用主视图控制器中的方法。我怎样才能做到这一点？

我的iPhone相当于：

// Creating it //
FlipsideViewController *controller = [[[FlipsideViewController alloc] initWithNibName:@"FlipsideViewController" bundle:nil] autorelease];
controller.delegate = self;
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:controller animated:YES];

从弹出窗口中调用方法：

if ([self.presentingViewController isKindOfClass:[MainViewController class]])
    [(MainViewController*)self.presentingViewController resetClock];

Answer 1

为显示的视图控制器提供对主视图控制器的引用。例如：

@class MainViewController;
@interface FlipsideViewController : UIViewController
{
}

@property (nonatomic, assign) MainViewController *mainController;

@end

（不要忘记实施中的@synthesize！）稍后当您呈现弹出窗口时，只需设置属性：

[controller setMainController:self];

Answer 2

·H

#import <UIKit/UIKit>
#import AppDelegate.h"

@interface FlipsideViewController : UIViewController
{
}

@property (nonatomic, assign) MainViewController *mainController;

@end

的.m

#import "FlipsideViewController.h"
#import "MainViewController.h"

@interface FlipsideViewController ()

@end

@implementation FlipsideViewController

@synthesize mainController = _mainController;

// methods

@end

从子popupviewcontroller调用super中的方法

2 个答案: