objective-c - 如何从Popover中的按钮关闭UIPopover

我正在尝试从Popover中的按钮关闭UIPopoverViewControler。另外，我希望它将数据传输回主 View 。我有它为modalViewController工作，但没有为Popover工作。有谁知道我怎么能做到这一点？

//弹出框

- (IBAction) save:(id)sender
{
    if ([self startDateIsValid] && [self endDateIsValid])
    {

        [[self parentViewController] setDatesForEvent:startDate eventEndDate:endDate allDay:[allDaySwitch isOn]];
        [self dismissModalViewControllerAnimated:YES];

    }

}

//AddEventViewController_iPad

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import "dateViewPopOverViewController_iPad.h"
@interface AddEventViewController_iPad : UIViewController <UITableViewDelegate,UITableViewDataSource, MFMailComposeViewControllerDelegate, UITextFieldDelegate,  UIAlertViewDelegate,UIPopoverControllerDelegate,UINavigationControllerDelegate,UIPopoverControllerDelegate,ABPeoplePickerNavigationControllerDelegate, ABNewPersonViewControllerDelegate,DismissPopoverDelegate> {

//datePopover

#import <UIKit/UIKit.h>
#import "AddEventViewController_iPad.h"
@protocol DismissPopoverDelegate <NSObject>

- (void) dismissWithData:(NSString *)data;

@end

@interface dateViewPopOverViewController_iPad : UIViewController<UIPopoverControllerDelegate> {

最佳答案

想法很简单。 YourViewController-它是UIPopoverController的viewController。 MainViewController-在其中创建UIPopoverController的 Controller

使用关闭方法

声明YourViewController中的协议(protocol)

在id<DismissDelegateProtocol>中声明YourViewController类型的属性

在DismissDelegateProtocol中声明对MainViewController的支持

在DismissDelegateProtocol中实现MainViewController的关闭方法

在YourViewController中创建MainViewController时，请设置委托(delegate)属性(yourViewController.delegate = self;)

实际上，对触摸按钮的调用委托(delegate)方法的响应:[self.delegate dismissWithData:dataToTransfer];

在代码中应该是这样的:

在MainViewController.h中:

#import "YourViewController.h"
@class MainViewController: UIViewController < DismissPopoverDelegate >

在MainViewController.m中:

- (void) dismissPopover:(NSObject *)yourDataToTransfer
{ /* Dismiss you popover here and process data */ }

...
// Some method, when you create popover
{
    YourViewController *vc = ... ;
    vc.delegate = self; // this delegate property should be declared as assign
}

在YourViewController.h 中:

@protocol DismissPopoverDelegate
- (void) dismissPopover:(NSObject *)yourDataToTransfer;
@end

@class YourViewController : UIViewController
{
    id<DismissPopoverDelegate> delegate;
}

@property (nonatomic, assign) id<DismissPopoverDelegate> delegate;

在YourViewController.m中:

- (void) methodWhenYouWantToDismissPopover
{
    [self.delegate dismissPopover:data];
}