//
//  CGXVerticalMenuContainerCollectionView.m
//  CGXVerticalMenuView-OC
//
//  Created by CGX on 2018/05/01.
//  Copyright © 2019 CGX. All rights reserved.
//

#import "CGXVerticalMenuContainerCollectionView.h"

@implementation CGXVerticalMenuContainerCollectionView

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    if (self.gestureDelegate && [self.gestureDelegate respondsToSelector:@selector(menuContainerCollectionView:gestureRecognizerShouldBegin:)]) {
        return [self.gestureDelegate menuContainerCollectionView:self gestureRecognizerShouldBegin:gestureRecognizer];
    }else {
        if (self.isNestEnabled) {
            if ([gestureRecognizer isMemberOfClass:NSClassFromString(@"UIScrollViewPanGestureRecognizer")]) {
                CGFloat velocityY = [(UIPanGestureRecognizer *)gestureRecognizer velocityInView:gestureRecognizer.view].y;
                //x大于0就是往下滑
                if (velocityY > 0) {
                    if (self.contentOffset.y == 0) {
                        return NO;
                    }
                }else if (velocityY < 0) {
                    //x小于0就是往上滑
                    if (self.contentOffset.y + self.bounds.size.height == self.contentSize.height) {
                        return NO;
                    }
                }
            }
        }
    }
    return YES;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    if (self.gestureDelegate && [self.gestureDelegate respondsToSelector:@selector(menuContainerCollectionView:gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:)]) {
        return [self.gestureDelegate menuContainerCollectionView:self gestureRecognizer:gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:otherGestureRecognizer];
    }
    return NO;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/

@end