兩個UIScrollView中的一個的UIView

Question

我想兩個UIScrollView添加的爲一個UIView，無論是scrollView的顯示正常，是我遇到的問題是，如何確定哪些scrollView滾動，因爲根據我有填充圖像。這是我在做什麼：

我有一個ViewController與UIScrollViewDelegate。

在我ViewConroller的loadView方法，我做了以下內容：

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]; 

然後：

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

然後：

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

我有一個scrollViewDidScroll:方法，我該如何確定這個方法去哪個t所調用，因爲基於此，我需要爲我的scrollView填充不同的圖像。

- (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 
} 

感謝您的幫助。

Answer 1

委託方法將與它一起發送消息的對象（本例中爲UIScrollView）。所以，你所要做的就是檢查你的實例變量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

您還可以設置兩個滾動視圖的標籤來區分

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 
    } 
}