关于ios：长按发生时忽略mapView：didSelectAnnotationView

Ignore mapView:didSelectAnnotationView when long press is occuring

我正在为此苦苦挣扎。我在一个小区域有很多别针的mapview。长按地图时，无论是否长按注解视图，我都想忽略mapview对注解的选择。似乎是在touchDown上选择了注释，而不是在注释视图上在内部进行了润饰，这很烦人。

我在地图视图中添加了一个长按手势：

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

当我长按注释视图时，无法识别此内容。当我按下" did select"注释委派调用后，长按就永远不会触发。

我试图阻止点击手势识别器，但这当然是行不通的，因为mapview的手势没有委托给我的map view控制器，所以这行不通：

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

我还尝试将长按手势添加到注解视图中作为一种hack，但是这种方法也不会被触发，而且我还是不喜欢这种策略。

当长按手势悬停在地图视图上时，是否可以阻止地图视图的注释选择？

找出解决方案。基本上是MKMapView的子类，并实现handleTap和handleLongPress。

在那儿，长按时我会阻塞水龙头。在处理同时识别两个手势的情况时，我也稍作延迟：

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@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