ios - ScrollView 类 iOS

Question

我的程序甚至没有进入 scrollViewDidScroll方法。我不知道为什么。我的 View 确实加载看起来像这样:

- (void)viewDidLoad
{
   [super viewDidLoad];

   // Set the size of the content to be displayed
   self.scrollView.contentSize = CGSizeMake(self.scrollView.bounds.size.width * ScrollViewControllerNumberOfPages, self.scrollView.bounds.size.height);

   // Turn on paging in the scroll view (can also be done in Interface Builder)
   self.scrollView.pagingEnabled = YES;

   NSLog(@"CurrentPage ViewDidLoad%@",self.pageControl.currentPage);
   switch (self.pageControl.currentPage)
   {
       case 1:
           [self.minkyImageView setImage:[UIImage imageNamed:@"monkey_1.png"]]; 
           NSLog(@"case1");
           break;
       case 2:
           [self.minkyImageView setImage:[UIImage imageNamed:@"Shape1.png"]];
            NSLog(@"case2");
           break;
       default:
           break;
   }     
}

我也实现了 scrollviewDelegate在我的界面上是这样的。我不明白我做错了什么。它甚至没有进入名为 scrollViewDidScroll 的方法中。 .

@interface MinkyScreenSwapViewController: UIViewController <UIScrollViewDelegate>

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGFloat contentWidth = scrollView.bounds.size.width;
CGFloat halfContentWidth = contentWidth / 2;
NSInteger currentPage = (scrollView.contentOffset.x + halfContentWidth) / contentWidth;
self.pageControl.currentPage = currentPage;
NSLog(@"CurrentPage");
}

Answer 1

试用:

self.scrollView.delegate = self;

希望这可以帮助。