如何在UICollectionView中按下視圖時關閉UIImageView

Question

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{ 
    UICollectionViewFlowLayout *myLayout=[[UICollectionViewFlowLayout alloc]init]; 
    myLayout.scrollDirection=UICollectionViewScrollDirectionHorizontal; 
    [self.collectionView setCollectionViewLayout:myLayout animated:YES]; 

    UIImageView *recipeImageView=[[UIImageView alloc]initWithFrame:CGRectMake(35, 100, 250, 250)]; 
    recipeImageView.layer.borderColor = [UIColor redColor].CGColor; 
    recipeImageView.layer.borderWidth = 8.0; 
    [self.view addSubview:recipeImageView]; 
    NSString *selectedRecipeImageFileName = [self.getName objectAtIndex:indexPath.row]; 
    UIImage *selectedRecipeImage = [UIImage imageNamed:selectedRecipeImageFileName]; 
    recipeImageView.image = selectedRecipeImage; 
} 

我正在使用集合視圖。首先，我按下任何圖像，然後在視圖上顯示UIImageView。如果我按下其他圖像，那麼該圖像將再次出現。此時它正常工作。之後，我想擁有它，所以如果我按下空白處，然後圖像視圖隱藏。請給我一些想法。

Answer 1

添加到您的點觸手勢：

[recipeImageView removeFromSuperview]; 

但你的圖像視圖必須是任何函數訪問。所以你可以創建一個函數，然後隨時調用它。

UPDATE

對不起，延遲響應。在您的.h文件中

：試試這個

首先在@interface ......添加<UIGestureRecognizerDelegate>

和@interface之後：

@property UIImageView *recipeImageView; 

在.m文件 viewDidLoad

：

UIGestureRecognizer *taps = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(removeImageView)]; 
    taps.cancelsTouchesInView = NO; 
    taps.delegate = self; 
    [self.view addGestureRecognizer:taps]; 

和你的.m文件中的某個地方：

-(void)removeImageView 
{ 
    [_recipeImageView removeFromSuperview]; 
} 

Answer 2

保留一個指向該UIImageView的指針並在其上調用removeFromSuperview。

Answer 3

在主視圖上使用輕擊手勢可將UIImageView從超級視圖中移除。

//inside viewDidLoad initilise tap gesture 
    tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(removeImageView:)]; 
    tapRecognizer.numberOfTapsRequired = 1; 

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{ 
UICollectionViewFlowLayout *myLayout=[[UICollectionViewFlowLayout alloc]init]; 
myLayout.scrollDirection=UICollectionViewScrollDirectionHorizontal; 
[self.collectionView setCollectionViewLayout:myLayout animated:YES]; 

UIImageView *recipeImageView=[[UIImageView alloc]initWithFrame:CGRectMake(35, 100, 250, 250)]; 
recipeImageView.layer.borderColor = [UIColor redColor].CGColor; 
recipeImageView.layer.borderWidth = 8.0; 

// tap gesture was initialised globally. 
[self.view addGestureRecognizer:tapGesture]; 

[self.view addSubview:recipeImageView]; 

NSString *selectedRecipeImageFileName = [self.getName objectAtIndex:indexPath.row]; 
UIImage *selectedRecipeImage = [UIImage imageNamed:selectedRecipeImageFileName]; 
recipeImageView.image = selectedRecipeImage; 

}

現在removeImageView內：

- (void)removeImageView:(UITapGestureRecognizer*)sender { 
    UIView *view = sender.view; 
    //Now here check the views on which user is taping and match if user is taping on desired view where you want remove the images from superView. and also remove the tap gesture from view. 

}