将UIScrollView委托设置为其自己的自定义类

Question

I created a custom component from UIScrollView.

I create a custom UIScrollview class and add it to my scroll view.

And in the custom class in "- (void)drawRect:(CGRect)rect" I design my scroll view the way I wanted. and its all working fine.

My Question is how to add my scrollview as the delegate of the Custom class.

I did this inside my custom class -

self.delegate = self;

and the delegate get set and I have access to the UIScroll view delegate methods (like - - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView).

My problem is once I set my delegate like 'self.delegate = self;' compiler gives me a warning like below

Please can anyone help me to fix this warning.

Answer 1

You need to declare your custom class as conforming to the UIScrollViewDelegate protocol.

Check out the Apple docs on protocols .

In your header file, you probably have something like

@interface OGOTimeSelector : UIScrollView

To declare that your class conforms to the UIScrollViewDelegate protocol, this would become:

@interface OGOTimeSelector : UIScrollView <UIScrollViewDelegate>