如何使 collectionview 响应其自身视图之外的平移手势

Question

我的 UIViewController 中有一个 UICollectionView，我希望它能够响应 UICollectionView 内外的手势。默认情况下，UICollectionView 仅响应其自身 view 内的手势，但我如何才能使其响应其 view 外的滑动？

谢谢。

Answer 1

我写了一个视图子类来完成这个：

#import <UIKit/UIKit.h>

@interface TouchForwardingView : UIView

@property (nonatomic, weak) IBOutlet UIResponder *forwardingTarget;

- (instancetype)initWithForwardingTarget:(UIResponder *)forwardingTarget;


@end

#import "TouchForwardingView.h"

@implementation TouchForwardingView

- (instancetype)initWithForwardingTarget:(UIResponder *)forwardingTarget
{
    self = [super init];
    if (self)
    {
        self.forwardingTarget = forwardingTarget;
    }

    return self;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesBegan:touches withEvent:event];
    [self.forwardingTarget touchesBegan:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesEnded:touches withEvent:event];
    [self.forwardingTarget touchesEnded:touches withEvent:event];
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesCancelled:touches withEvent:event];
    [self.forwardingTarget touchesCancelled:touches withEvent:event];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesMoved:touches withEvent:event];
    [self.forwardingTarget touchesMoved:touches withEvent:event];
}

@end

在界面生成器中，将包含视图的子视图设置为 TouchForwardingView，然后将集合视图分配给 forwardingTarget 属性。

Answer 2

Swift 版本的 Nailer 的答案，这会将在 viewcontroller 上完成的所有手势转发到 collectionview

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    collectionView.touchesBegan(touches, withEvent: event)
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
    collectionView.touchesEnded(touches, withEvent: event)
}
override func touchesCancelled(touches: Set<UITouch>?, withEvent event: UIEvent?) {
    collectionView.touchesCancelled(touches, withEvent: event)
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
    collectionView.touchesMoved(touches, withEvent: event)
}

Answer 3

Steven B 的回答 Swift 4 :)

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    collectionView.touchesBegan(touches, with: event)
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    collectionView.touchesEnded(touches, with: event)
}
override func touchesCancelled(_ touches: Set<UITouch>?, with event: UIEvent?) {
    collectionView.touchesCancelled(touches!, with: event)
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    collectionView.touchesMoved(touches, with: event)
}

如何使 collectionview 响应其自身视图之外的平移手势

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