輕按UIButton時關閉UIView

Question

在我的應用程序中，我有一個水平圖像庫，當我點擊圖像時， UIView稱為顯示放大圖像。 UIView包含一個scrollView ，以編程方式創建的imageviews （動態創建）和一個UIButton （關閉按鈕）。 但是，當我點擊關閉按鈕時，不會關閉UIView 。 在我的viewDidLoad中，我設置了gestureRecognizer 。

[self.view addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapAction:)]];

這是我的singleTapAction方法：

- (void)singleTapAction:(UIGestureRecognizer *)singleTap_
{
    MTGalleryPopUp* galleryImage = [[[NSBundle mainBundle] loadNibNamed:@"MTGalleryPopUp" owner:self options:nil] lastObject];
    if(galleryImage.hidden)
    {
        NSLog(@"HIDDEN");
        [galleryImage dismissWithAnimation:YES];
    }
    else
    {
        NSLog(@"NOT HIDDEN");
        [self showGalleryDialog];
    }
}

這是我的showGalleryDialog方法：

- (void)showGalleryDialog
{
    MTGalleryPopUp * galleryView = [[[NSBundle mainBundle] loadNibNamed:@"MTGalleryPopUp" owner:self options:nil] lastObject];

    [galleryView setReferenceVC:self];
    [galleryView initWithTitle:@"Image Gallery"];
    [galleryView setAlpha:0.0f];
    [self.view addSubview:galleryView];
    [UIView beginAnimations:nil context:nil];
    [galleryView setAlpha:1.0];
    [UIView commitAnimations];
}

這是我創建UIView ：

- (id)initWithTitle:(NSString *)aTitle
{
    CGRect rect = [[UIScreen mainScreen] bounds]; // portrait bounds
    if (self = [super initWithFrame:rect])
    {
        CGRect screenRect = [[UIScreen mainScreen] bounds];
        [self setBackgroundColor:[UIColor colorWithRed:0.0f green:0.0f blue:0.0f alpha:0.8f]];

        self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0f, TITLE_HEIGHT, screenRect.size.width, 350)];
        [self.scrollView setUserInteractionEnabled:YES];

       CloseButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
       [CloseButton addTarget:self
                    action:@selector(dismissWithAnimation:)
          forControlEvents:UIControlEventTouchUpInside];

        [CloseButton setTitle:@"X" forState:UIControlStateNormal];
        [CloseButton.layer setBorderWidth:2];
        [CloseButton.layer setBorderColor:[UIColor whiteColor].CGColor];

        CloseButton.layer.cornerRadius=10;
        CloseButton.layer.masksToBounds = YES;
        [CloseButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        CloseButton.titleLabel.font=[UIFont systemFontOfSize:16];
        CloseButton.frame=CGRectMake(self.frame.size.width-80, 8, 20, 20);
        [self addSubview:CloseButton];

        strURL = [NSString stringWithFormat:@"%@%@?temp_url_sig=%@&temp_url_expires=%lld", URLstorage, CONTAINER_PATH, HMACStr, [@(floor([oneMinLater timeIntervalSince1970])) longLongValue]];

        [mutableURLstorage addObject:strURL];
        [imagesArray addObject:[[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:strURL]]]];
    }

    CGSize pageSize = CGSizeMake(ITEM_WIDTH, self.scrollView.frame.size.height);
    _pgCtr = [[UIPageControl alloc] initWithFrame:CGRectMake(0, screenRect.size.height-30, 320, 36)];
    _pgCtr.backgroundColor=[UIColor grayColor];
    int numberofPage=ceil((float)[imagesArray count]/2.5);
    _pgCtr.numberOfPages= numberofPage;
    self.scrollView.contentSize = CGSizeMake(450*numberofPage, pageSize.height);

    int imgCurrentX = 10;
    for (UIImageView* image in imagesArray)
    {
        @autoreleasepool
        {
            imageview = [[UIImageView alloc] initWithFrame:CGRectMake(imgCurrentX, 45, 200, self.scrollView.frame.size.height - 10)];
                imageview.image = (UIImage*)image;
                [imageview setUserInteractionEnabled:YES];
                [self.scrollView addSubview:imageview];
                imgCurrentX = imgCurrentX + 220;
            }
        }

        [self addSubview:self.scrollView];
    }

    return self;
}

當我在調試，發生的事情是它可以追溯到singleTap_方法，並再次重新創建UIView （現在二人UIViews重疊）。 我在這里做錯了什么？

任何幫助將不勝感激。 謝謝。

Answer 1

我看到了幾個問題：MTGalleryPopUp未保存； 視圖未正確初始化； 我認為您可以通過更改“ alpha”來消除視圖，但是在singleTapAction中檢查“ hidden”屬性：-這是不同的事情。

將屬性galleryPopUp添加到根控制器：

@property MTGalleryPopUp *galleryPopUp;

這將是一個懶惰的初始化對象，添加以下方法：

- (MTGalleryPopUp *)galleryPopUp {
  if (!_galleryPopUp) {
    _galleryPopUp = [[[NSBundle mainBundle] loadNibNamed:@"MTGalleryPopUp" owner:self options:nil] lastObject];
  }
  return _galleryPopUp;
}

更改singleTapAction：

- (void)singleTapAction:(UIGestureRecognizer *)singleTap_
{
    if(self.galleryPopUp.alpa == 0)
    {
        NSLog(@"HIDDEN");
        [self showGalleryDialog];
    }
    else
    {
        NSLog(@"NOT HIDDEN");
        [galleryImage dismissWithAnimation:YES];
    }
}

並且showGalleryDialog中存在一個問題：

[galleryView initWithTitle:@"Image Gallery"];

應該在UIView中調用它，不是嗎？

Answer 2

您將創建“ MTGalleryPopUp”類的兩個對象。 因此，更好的方法是在“ .h”文件中聲明它，並在viewDidLoad中對其進行初始化。 根據每個水龍頭只是隱藏和顯示。 我希望它能解決您的問題