Как распознать oneTap / doubleTap в данный момент?

на простой способ сделать это-подкласс UITapGestureRecognizer и не общий UIGestureRecognizer.

такой:

#import <UIKit/UIGestureRecognizerSubclass.h>

#define UISHORT_TAP_MAX_DELAY 0.2
@interface UIShortTapGestureRecognizer : UITapGestureRecognizer

@end

и просто реализовать:

@implementation UIShortTapGestureRecognizer

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesBegan:touches withEvent:event];
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(UISHORT_TAP_MAX_DELAY * NSEC_PER_SEC)), dispatch_get_main_queue(), ^
    {
        // Enough time has passed and the gesture was not recognized -> It has failed.
        if  (self.state != UIGestureRecognizerStateRecognized)
        {
            self.state = UIGestureRecognizerStateFailed;
        }
    });
}
@end

единственное, что вам нужно сделать, это добавить дополнительную строку кода для использования requireGestureRecognizerToFail

[singleTapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];

затем весь код стал:

UITapGestureRecognizer *doubleTapRecognizer = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(beginComicTransitions:)] autorelease];    
doubleTapRecognizer.numberOfTapsRequired = 2;
doubleTapRecognizer.numberOfTouchesRequired = 1;
doubleTapRecognizer.delegate = self;   

UITapGestureRecognizer *singleTapRecognizer = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(bringMenu:)] autorelease];    
singleTapRecognizer.numberOfTapsRequired = 1;
singleTapRecognizer.numberOfTouchesRequired = 1;
singleTapRecognizer.delegate = self;

[singleTapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];

• если не распознается двойное нажатие, то одно нажатие будет распознано
• если распознано двойное нажатие, не распознает одно нажатие

swift код версии:

    let doubleTap = UITapGestureRecognizer(target: self, action: "doubleTapped:")
    doubleTap.numberOfTapsRequired = 2
    doubleTap.numberOfTouchesRequired = 1
    self.scrollView.addGestureRecognizer(doubleTap)

    let singleTap = UITapGestureRecognizer(target: self, action: "singleTap:")
    singleTap.numberOfTapsRequired = 1
    singleTap.numberOfTouchesRequired = 1
    self.scrollView.addGestureRecognizer(singleTap)

    singleTap.requireGestureRecognizerToFail(doubleTap)

вот простые пользовательские распознаватели жестов для двойных нажатий, где вы можете указать максимально допустимое время между нажатиями. Это основано на ответе @Walters.

PbDoubleTapGestureRecognizer.h:

@interface PbDoubleTapGestureRecognizer : UIGestureRecognizer

@property (nonatomic) NSTimeInterval maximumDoubleTapDuration;

@end

PbDoubleTapGestureRecognizer.м :

#import "PbDoubleTapGestureRecognizer.h"
#import <UIKit/UIGestureRecognizerSubclass.h>

@interface PbDoubleTapGestureRecognizer ()
@property (nonatomic) int tapCount;
@property (nonatomic) NSTimeInterval startTimestamp;
@end

@implementation PbDoubleTapGestureRecognizer

- (id)initWithTarget:(id)target action:(SEL)action {
    self = [super initWithTarget:target action:action];
    if (self) {
        _maximumDoubleTapDuration = 0.3f; // assign default value
    }
    return self;
}

-(void)dealloc {
    [NSObject cancelPreviousPerformRequestsWithTarget:self];
}

- (void)reset {
    [super reset];

    [NSObject cancelPreviousPerformRequestsWithTarget:self];

    self.tapCount = 0;
    self.startTimestamp = 0.f;
}

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

    if (touches.count != 1 ) {
        self.state = UIGestureRecognizerStateFailed;
    } else {
        if (self.tapCount == 0) {
            self.startTimestamp = event.timestamp;
            [self performSelector:@selector(timeoutMethod) withObject:self afterDelay:self.maximumDoubleTapDuration];
        }
        self.tapCount++;
    }
}

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

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

    if (self.tapCount > 2) {
        self.state = UIGestureRecognizerStateFailed;
    } else if (self.tapCount == 2 && event.timestamp < self.startTimestamp + self.maximumDoubleTapDuration) {
        [NSObject cancelPreviousPerformRequestsWithTarget:self];
        NSLog(@"Recognized in %f", event.timestamp - self.startTimestamp);
        self.state = UIGestureRecognizerStateRecognized;
    }
}

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

- (void)timeoutMethod {
    self.state = UIGestureRecognizerStateFailed;
}

@end

вы можете использовать его как это:

PbDoubleTapGestureRecognizer *doubleTapGr = [[PbDoubleTapGestureRecognizer alloc]initWithTarget:self action:@selector(_doubleTapAction)];
doubleTapGr.maximumDoubleTapDuration = 0.4;
[yourView addGestureRecognizer:doubleTapGr];

вы можете объединить это с requireGestureRecognizerToFail: чтобы получить поведение, которое просили.

Swift 3.1 версия eladleb это!--5--> ответ.

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
        super.touchesBegan(touches, with: event)

        DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in
            if self?.state != .recognized {
                self?.state = .failed
            }
        }
    }

@interface NaMeClass ()

@property (nonatomic, strong) UITapGestureRecognizer * singleTap;
@property (nonatomic, strong) NSTimer *timer;

@end

//...код...

//viewDidLoad
self.singleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapIcon:)];
self.singleTap.numberOfTapsRequired = 1;
self.singleTap.cancelsTouchesInView = YES;
self.singleTap.delaysTouchesBegan = YES;
[self addGestureRecognizer:self.singleTap];

//.....code

-(void)tapIcon:(UITapGestureRecognizer *)tapGesture
{
    if (tapGesture.state == UIGestureRecognizerStateEnded){
        if (!self.timer) {
            self.timer = [NSTimer scheduledTimerWithTimeInterval:0.2
                         target:self selector:@selector(singleTap) userInfo:nil repeats:NO];
        }else{
            [self doubleTap];
     }
}

}

-(void)singleTap{
    [self.timer invalidate];
    self.timer = nil;
    NSLog(@"1111111111111");
}

-(void)doubleTap{
    [self.timer invalidate];
    self.timer = nil;
    NSLog(@"22222222222");
}