ios - UIViewController的视图的属性框在UIScrollView下使用单个子视图时不起作用

Question

在使用 UIScrollView 的缩放功能之前，一切都很好。代码如下：

 UIScrollView* scrollView = [[UIScrollView alloc]init];
   for(int i=0; i < foodIntroCount; ++i) {
        UIImage* image = [UIImage imageNamed:@"7_1.jpg"];
        UIImageView * imgView = [[UIImageView alloc]initWithImage:image];
        imgView.frame = CGRectMake(0, height*i, width, height);
        [scrollView addSubView:imgView];
   }

   scrollView.contentSize =  CGSizeMake(width, height*(foodIntroCount+1)) ;
   scrollView.pagingEnabled = YES; 
   scrollView.showsVerticalScrollIndicator = NO;
   scrollView.showsHorizontalScrollIndicator = NO;
   scrollView.bounces = NO;
   scrollView.delegate = self;


   _foodWineViewController = [[OHFoodWineViewController alloc]initWithCategoryData:_foodData];
   UIView* wineView = _foodWineViewController.view;
   wineView.frame = CGRectMake(0, height*(foodIntroCount), width, height);
   [scrollView addSubview:wineView];

添加缩放功能后，代码如下所示：

UIScrollView* scrollView = [[UIScrollView alloc]init];
UIView* zoomView = [[UIView alloc]init];
   for(int i=0; i < foodIntroCount; ++i) {
        UIImage* image = [UIImage imageNamed:@"7_1.jpg"];
        UIImageView * imgView = [[UIImageView alloc]initWithImage:image];
        imgView.frame = CGRectMake(0, height*i, width, height);
        [zoomView addSubView:imgView];
   }

   scrollView.contentSize =  CGSizeMake(width, height*(foodIntroCount+1)) ;
   scrollView.pagingEnabled = YES; 
   scrollView.showsVerticalScrollIndicator = NO;
   scrollView.showsHorizontalScrollIndicator = NO;
   scrollView.bounces = NO;
   scrollView.delegate = self;
   scrollView.maximumZoomScale = 2.0;


   _foodWineViewController = [[OHFoodWineViewController alloc]initWithCategoryData:_foodData];
   UIView* wineView = _foodWineViewController.view;
   wineView.frame = CGRectMake(0, height*(foodIntroCount), width, height);
   [zoomView addSubView:wineView];
   [scrollView addSubview:zoomView];

问题是：wineView 显示在第一页，而不是 foodIntroCount+1 页面。

Answer 1

如果您想一个接一个地垂直添加子视图，您的代码应该考虑之前的y 位置和高度。所以你的代码应该如下所示

imgView.frame = CGRectMake(0, height*i+y, width, height);

代码没有经过测试，试试这个..