Question

有一个基本形式，按下按钮调用方法performSegueWithIdentifier，显示弹出窗口。在弹出窗口处于活动状态之前，我怎样才能使主视图窗口变暗（变暗）？

我试图像这样使用库SVProgressHUD：

- (IBAction)publishButtonAction:(id)sender {
    [SVProgressHUD showWithMaskType:SVProgressHUDMaskTypeBlack];
    [self performSegueWithIdentifier:@"fbshareSigue" sender:self];
    [SVProgressHUD dismiss];
}

获得一瞬间 - 直到有一个弹出窗口。

如果我尝试这个，我必须在哪里插入此代码？：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{

    if ([[segue identifier] isEqualToString:@"fbshareSigue"]) {
        OFAFBShareViewController *svc = (OFAFBShareViewController *) [segue destinationViewController];
        UIStoryboardPopoverSegue *popoverSegue = (UIStoryboardPopoverSegue *)segue;
        svc.postBlock = self.postInitBlock;
        [svc setClosePopWindow:[popoverSegue popoverController]];
    }
}

    - (IBAction)publishButtonAction:(id)sender {
        UIView *dimView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
        dimView.backgroundColor = [UIColor blackColor];
        dimView.alpha = 0.5f;
        dimView.tag = 1111;
        dimView.userInteractionEnabled = NO;
        [self.view addSubview:dimView];

        [self performSegueWithIdentifier:@"fbshareSigue" sender:self];
}

  /* This code should be put in the other method where you are removing the popup.. Because it will remove the dim view. here is the wrong place for this code*/  

 /* for (UIView *view in [self.view subviews]) {
        if (view.tag == 1111) {
            [view removeFromSuperview];
        }
    }*/

昏暗不起作用......

====================

我有调用Popover（OFAResultViewController）的查看OFAFBShareViewController：

...
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{

    if ([[segue identifier] isEqualToString:@"fbshareSigue"]) {
        OFAFBShareViewController *svc = (OFAFBShareViewController *) [segue destinationViewController];
        UIStoryboardPopoverSegue *popoverSegue = (UIStoryboardPopoverSegue *)segue;
        svc.postBlock = self.postInitBlock;
        [svc setClosePopWindow:[popoverSegue popoverController]];
    }
}

- (IBAction)publishButtonAction:(id)sender {
    UIView *dimView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
    dimView.backgroundColor = [UIColor blackColor];
    dimView.alpha = 0.5f;
    dimView.tag = 1111;
    dimView.userInteractionEnabled = NO;
    [self.view addSubview:dimView];
    [self performSegueWithIdentifier:@"fbshareSigue" sender:self];    
}
...

在OFAFBShareViewController我试图关闭昏暗的视图：

...
- (IBAction)cancelButtonAction:(id)sender {
    [closePopWindow dismissPopoverAnimated:YES];
    for (UIView *view in [self.view subviews]) {
            if (view.tag == 1111) {
                [view removeFromSuperview];
            }
}
...

但它不再起作用了......

Answer 1

显示弹出窗口时，您可以使用以下代码。

在OFAFBShareViewController中

- (void) loadView
{
       [super loadView]; 
       UIView *dimView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
        dimView.backgroundColor = [UIColor blackColor];
        dimView.alpha = 0.5f;
        dimView.tag = 1111;
        dimView.userInteractionEnabled = NO;
        [self.view addSubview:dimView];
}

删除弹出窗口后，使用标记从超级视图中删除此视图。

在iOS 5.0之后，还引入了一种公共API方法：

=============================================== =======

要删除视图，您可以使用以下代码：

 for (UIView *view in [self.view subviews]) {
                if ([view.tag == 1111]) {
                    [view removeFromSuperview];
                }
            }

保持删除Dim View代码不变。仅将super.view再次更改为self.view。

那对你有用。

希望它适合你...

Answer 2

创建弹出窗口时，将昏暗视图添加到当前视图，并将当前视图添加为弹出控制器的UIPopoverControllerDelegate：

添加dimView：

let dimView = UIView(frame: view.frame)
view.addSubview(dimView)
dimView.backgroundColor = UIColor.blackColor()
dimView.alpha = 0.5
dimView.tag = 1234
dimView.userInteractionEnabled = false
view.addSubview(dimView)

将原点视图添加为popoverController的委托：
```
popoverViewController!.delegate = self
```

然后，为了在解除弹出窗口时删除dimView，将当前视图设置为实现UIPopoverControllerDelegate，并实现popoverControllerDidDismissPopover函数。在此函数内，删除dimView：

extension MyOriginViewController: UIPopoverControllerDelegate {

    func popoverControllerDidDismissPopover(popoverController: UIPopoverController) {
        for subView in view.subviews {
            if subView.tag == 1234 {
                 subView.removeFromSuperview()
            }
        }
    }
}

调用Popover时调暗主视图

2 个答案: