Question

我想知道我是否以正确的方式做到了。我有我的类UIMyView，我添加到我的主UIView。在那个UIMyView我使用NSTimer做一些事情，毕竟我调用removeFromSuperView方法返回主UIView。我想注意我的UIMyView何时关闭。我使用NSNotificationCenter来做这件事，但也许还有其他更好的方法吗？

编辑：好的，但我想你，你不理解我。使用setHidden或containsObject我们需要执行此操作，例如puttin it click Button或类似的东西。我想做的是检查何时关闭UIMyView而没有任何用户交互。

Answer 1

尝试这个。可能这对你有帮助

BOOL hasMapView = [self.contentView.subviews containsObject:self.mapView];
UIView *fromView, *toView;
if (hasMapView)
{
    [btnMode setImage:[UIImage imageNamed:@"map-mode.png"] forState:UIControlStateNormal];

    fromView = self.mapView;
    toView = self.tblVideo;
    [self.tblVideo reloadData];
}
else
{
    fromView = self.tblVideo;
    toView = self.mapView;

    [btnMode setImage:[UIImage imageNamed:@"list-mode.png"] forState:UIControlStateNormal];
    [self reloadPins];
}

Answer 2

使用它而不是使用removeFromSuperView

[urViewnm setHidden：YES];

Answer 3

检测视图是否已关闭

BOOL isViewActive = [self.view.subviews containsObject:UIMyView];

Answer 4

使用协议可以实现：

1.在CustomViewController.h中创建协议

 @protocol CustomViewControllerDelegate <NSObject>

- (void) didCustomViewControllerRemove:(id)sender;

@end

@interface CustomViewController : UIViewController

@property (retain) id <NSObject, CustomViewControllerDelegate> delegate;

@end

在CustomViewController.m中实现协议

  #import "CustomViewController.h"

    @implementation CustomViewController

  - (IBAction)cancelBtnPressed:(id)sender {    
    [_delegate didCustomViewControllerRemove:self];

  }

UIMyView.h

#import“CustomViewController.h”

@interface UIMyView：UIViewController'＆lt;'CustomViewControllerDelegate'＆gt;'

{}

使用委托方法UIMyView.m

 - (void) addCustomViewControllerMethod {

  CustomViewController *obj = [CustomViewController alloc]
 initWithNibName:@"CustomViewController" bundle:nil];

  [self.view addSubView: obj];

  obj.delegate =self; 

 }      
  - (void)didCustomViewControllerRemove:(id)sender {

         [self dismissViewControllerAnimated:YES completion:nil];      
 }

检测UIMyView何时关闭

4 个答案: