我已经阅读了吨的内容,虽然大多数似乎是关于非故事板的方法,但我认为我拼凑了一些并弄明白了。但是,以下代码不会导致我的popover被解雇。 Popover中的dismissPopoverButtonPressed按钮执行但委托中的dismissPopover方法中的断点永远不会发生。非常感谢有人密切关注代码以发现错误。
由于
在下文中,NewGameViewController包含一个UIButton。按此按钮会弹出Popover Segue并显示包含PopViewController UIView的弹出框。
NewGameViewController.h
#import "PopViewController.h"
@interface NewGameViewController: UIViewController <DismissPopoverDelegate>
{
UIPopoverController *popover;
}
NewGameViewController.m
@implementation NewGameViewController
-(void)prepareForSegue:(UIStoryboardPopoverSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"popoverSegue"])
{
popover = [(UIStoryboardPopoverSegue *)segue popoverController];
// getting warning: Assigning to 'id<UIPopoverControllerDelegate>' from incompatible type 'NewGameViewController *const__strong'
//popover.delegate = self;
}
}
-(void)dismissPopover
{
[popover dismissPopoverAnimated:YES];
}
PopViewController.h
@protocol DismissPopoverDelegate <NSObject>
-(void) dismissPopover;
@end
@interface PopViewController: UIViewController
{
__unsafe_unretained id<DismissPopoverDelegate> delegate;
}
@property (nonatomic, assign) id<DismissPopoverDelegate> delegate;
-(IBAction)dismissPopoverButtonPressed:(id)sender;
@end
PopViewController.m
#import "NewGameViewController.h"
@implementation PopViewController
@synthesize delegate;
-(IBAction)dismissPopoverButtonPressed:(id)sender
{
[self.delegate dismissPopover];
}
答案 0 :(得分:13)
当从故事板segue链接到弹出控制器时,segue的popoverController
属性指的是标准的UIPopoverController。此控制器本身具有一个属性contentViewController
,它将表示实际在弹出框中显示的视图控制器,在您的情况下为PopViewController
。
因此,当你真正需要将自己设置为popover的 content 视图控制器的委托时,你当前的代码将自己设置为popover控制器的委托。
您仍然需要保留对弹出控制器的引用,以解除,以便保留现有代码,但进行以下更改:
-(void)prepareForSegue:(UIStoryboardPopoverSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"popoverSegue"])
{
popover = [(UIStoryboardPopoverSegue *)segue popoverController];
// Get a reference to the content view controller of the popover
PopViewController *popVC = (PopViewController*)popover.contentViewController;
// Set ourselves as the content VC's delegate
popVC.delegate = self;
}
}