IOS delegate写法

A.h类:

 

@protocol GifWebViewDelegate <NSObject>

@optional

- (void)gifWebViewHadOnceTap;

@end

@interface GifWebView : UIWebView <UIGestureRecognizerDelegate> {
   
}

@property (nonatomic, assign) id<GifWebViewDelegate> gifWebViewDelegate;

@end

 

A.m类:

....

@synthesize gifWebViewDelegate;

- (void)handleSingleTap:(UITapGestureRecognizer *)sender
{
    if ([gifWebViewDelegate retainCount] > 0 && [gifWebViewDelegate respondsToSelector:@selector(gifWebViewHadOnceTap)]) {
        [gifWebViewDelegate performSelector:@selector(gifWebViewHadOnceTap)];
    }
}

....