首页 文章

检测popover dismiss

提问于
浏览 次
7

我想玩UIPopupController，我明白我无法检测到我的popover解雇 . 我的步骤：
1.从XCode创建示例（文件 - >新项目 - >实用应用程序）
2.添加到MainViewController.h UIPopoverControllerDelegate

#import "FlipsideViewController.h"

@interface MainViewController : UIViewController <FlipsideViewControllerDelegate,UIPopoverControllerDelegate>

@property (strong, nonatomic) UIPopoverController *flipsidePopoverController;

- (IBAction)showInfo:(id)sender;

@end
  • 在MainViewController中：
- (IBAction)showInfo:(id)sender
    {
        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
            FlipsideViewController *controller = [[FlipsideViewController alloc] initWithNibName:@"FlipsideViewController" bundle:nil];
            controller.delegate = self;
            controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
            [self presentModalViewController:controller animated:YES];
        } else {
            if (!self.flipsidePopoverController) {
                FlipsideViewController *controller = [[FlipsideViewController alloc] initWithNibName:@"FlipsideViewController" bundle:nil];
                controller.delegate = self;

                self.flipsidePopoverController.delegate = self

                self.flipsidePopoverController = [[UIPopoverController alloc] initWithContentViewController:controller];
            }
            if ([self.flipsidePopoverController isPopoverVisible]) {
                [self.flipsidePopoverController dismissPopoverAnimated:YES];
            } else {
                [self.flipsidePopoverController presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
            }
        }
    }

    -(void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController
    {
        NSLog(@"OLOLO");
    }

但是当我点击某个地方，并且popover消失时，Console中没有NSLog消息 . 我究竟做错了什么？

ios uipopovercontroller

4 回答

  • 15

    将popover的代表设置为self，你也可以使用两个popover代理，即： -

    /* Called on the delegate when the popover controller will dismiss the popover. Return NO to prevent the dismissal of the view.
 */
- (BOOL)popoverControllerShouldDismissPopover:(UIPopoverController *)popoverController;

/* Called on the delegate when the user has taken action to dismiss the popover. This is not called when -dismissPopoverAnimated: is called directly.
 */
- (void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController;
    回复于
  • 5

    早期的答案建议使用UIPopoverControllerDelegate，这似乎是实现目标的唯一合理方式 . 我认为添加一个实际的例子会很好，因为这不是最简单的事情 . 我的要求很简单 - 我希望背景视图模糊，而弹出窗口是可见的，所以这里是步骤：

    • 在故事板中连接弹出窗口，在目标视图控制器属性中配置它的弹出窗口内容大小 .

    • 通过打开.h文件并执行以下操作，使源视图控制器成为UIPopoverControllerDelegate：

    @interface MyController : UIViewController <UIPopoverControllerDelegate>
    • 覆盖prepareForSegue，将源视图控制器指定为弹出窗口的委托，然后在segue显示目标之前将alpha设置为0.5：
    - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    UIStoryboardPopoverSegue* popover = (UIStoryboardPopoverSegue*)segue;
    popover.popoverController.delegate = self;
    self.view.alpha = 0.5;
}
    • 实现popover委托方法popoverControllerDidDismissPopover . 将alpha设置回1.0并取消分配给代表，以确保我们不会停止ARC执行它的工作：
    -(void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController {
    self.view.alpha = 1.0;
    popoverController.delegate = nil;
}
    回复于
  • 0

    您是否将MainViewController实例设置为popover的委托？

    （如果你通过代码创建popover） popover.delegate = self;

    回复于
  • 2
    - (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
UIStoryboardPopoverSegue *popoverSegue;
popoverSegue = (UIStoryboardPopoverSegue *)segue;
popoverController = popoverSegue.popoverController;
pCVisible = YES;
[[segue destinationViewController] setDelegate:self];
}

- (void) setDataFromPopover {
  if (pCVisible) {
     [popoverController dismissPopoverAnimated:YES]; // THIS IS KEY!   this is where the popover is dismissed, not in the popover itself
  }
}

    和

    //TableViewController.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:       (NSIndexPath *)indexPath
{
   //variable = whatever

OtherViewController *initialView;
initialView=(OtherViewController *)self.delegate;
initialView.theLabel.text = variable;
[initialView setDataFromPopover];
}
    回复于

相关问题