ios - 忽略 map 查看 :didSelectAnnotationView when long press is occuring

Question

我正在为这个问题苦苦挣扎。我有一个 map View ，在一个小区域中有很多图钉。当我长按 map 时，我想忽略 map View 对注释的选择，无论我是否长按注释 View 。似乎注释是在触摸时被选择的，而不是在注释 View 内部进行触摸，这很烦人。

我在 map View 中添加了长按手势:

UILongPressGestureRecognizer *longRec = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(addPin:)];
longRec.cancelsTouchesInView = YES;
[self.mapView addGestureRecognizer:longRec];

当我长按注释 View 时，无法识别这一点。一旦我按下，did select 注释委托(delegate)调用就会被处理，并且长按永远不会触发。

我尝试阻止点击手势识别器，这当然不起作用，因为 map View 的手势没有委托(delegate)给我的 map View Controller ，所以这不起作用:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]] && [otherGestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]]) {
        return NO;
    }
    return YES;
}

我还尝试在注释 View 中添加长按手势作为一种黑客手段，但这也永远不会被触发，而且我无论如何也不喜欢这种策略。

当长按手势在 map View 上待处理时，是否有办法阻止 map View 的注释选择？

Answer 1

想出了一个解决办法。基本上是MKMapView的子类化并实现handleTap和handleLongPress。

在那里，我在长按期间阻止了点击。我还给出了一点延迟来处理同时识别两个手势的情况:

@implementation KWMapView // :MKMapView

- (void)handleTap:(UITapGestureRecognizer *)tapGesture
{
    CGPoint tapPoint = [tapGesture locationInView:self];
    NSUInteger numberOfTouches = [tapGesture numberOfTouches];

    if (numberOfTouches == 1 && tapGesture.state == UIGestureRecognizerStateEnded) {
        if (!self.blockTap) {
            id v = [self hitTest:tapPoint withEvent:nil];

            if ([v isKindOfClass:[MKAnnotationView class]]) {
                [self addAnnotation:[v annotation]];
                [self selectAnnotation:[v annotation] animated:YES];
            } else {
                [[NSNotificationCenter defaultCenter] postNotificationName:PNMapViewDidTapMap object:tapGesture];
            }
        }
    }
}

- (void)handleLongPress:(UILongPressGestureRecognizer*)sender {
    self.blockTap = YES;

    if (sender.state == UIGestureRecognizerStateBegan) {
        [[NSNotificationCenter defaultCenter] postNotificationName:PNMapViewDropPinGesture object:sender];
    }

    if (sender.state == UIGestureRecognizerStateEnded || sender.state == UIGestureRecognizerStateCancelled || sender.state == UIGestureRecognizerStateFailed) {
        double delayInSeconds = .2;
        dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
        dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
            self.blockTap = NO;
        });
    }
}
@end