两个UIScrollView中的一个的UIView

Question

我想两个UIScrollView添加的为一个UIView，无论是scrollView的显示正常，是我遇到的问题是，如何确定哪些scrollView滚动，因为根据我有填充图像。这是我在做什么：

我有一个ViewController与UIScrollViewDelegate。

在我ViewConroller的loadView方法，我做了以下内容：

CGRect scrollViewFrame1; 
CGPoint scrollViewPoint1; 
scrollViewPoint1.x = 0; 
scrollViewPoint1.y = 57; 

CGSize scrollViewSize1; 
scrollViewSize1.width = 320; 
scrollViewSize1.height = 154; 

scrollViewFrame1.size = scrollViewSize1; 
scrollViewFrame1.origin = scrollViewPoint1; 

CGRect scrollViewFrame2; 
CGPoint scrollViewPoint2; 
scrollViewPoint2.x = 0; 
scrollViewPoint2.y = 258; 

CGSize scrollViewSize2; 
scrollViewSize2.width = 320; 
scrollViewSize2.height = 154; 

scrollViewFrame2.size = scrollViewSize2; 
scrollViewFrame2.origin = scrollViewPoint2; 

scrollView1 = [[UIScrollView alloc] initWithFrame:scrollViewFrame1]; 
scrollView2 = [[UIScrollView alloc] initWithFrame:scrollViewFrame2]; 

然后：

scrollView1.delegate = self; 
    scrollView2.delegate = self; 

然后：

[self.view addSubView:scrollView1]; 
[self.view addSubView:scrollView2]; 

我有一个scrollViewDidScroll:方法，我该如何确定这个方法去哪个t所调用，因为基于此，我需要为我的scrollView填充不同的图像。

- (void)scrollViewDidScroll:(UIScrollView *)scrollView 
{ 
     //Code to populate the next or previous images for scrollView 
      // If it was one i am able to show the images 
} 

感谢您的帮助。

Answer 1

委托方法将与它一起发送消息的对象（本例中为UIScrollView）。所以，你所要做的就是检查你的实例变量scrollView1和scrollView2。

- (void)scrollViewDidScroll:(UIScrollView *)scrollView 
{ 
    if (scrollView == scrollView1) { 
     //do stuff with scrollView1 
    } else if (scrollView == scrollView2) { 
     //do stuff with scrollView2 
    } 
} 

Answer 2

FYI

您还可以设置两个滚动视图的标签来区分

scrollView1.tag=10; 
scrollView2.tag=11; 
[self.view addSubView:scrollView1]; 
[self.view addSubView:scrollView2]; 

在您的代理

- (void)scrollViewDidScroll:(UIScrollView *)scrollView 
{ 
    if (scrollView1.tag==10) { 
     //do stuff with scrollView1 
    } else if (scrollView2.tag==11) { 
     //do stuff with scrollView2 
    } 
}