自定义地图标注视图在点击时会隐藏

Question

自定义地图标注视图在点击时会隐藏

4

我已经制作了自定义地图标注。我的标注包含UIButtons和UITextView。当我点击UIButton时，它会很好地按下。但是当我点击UITextView时，它会将光标移动到点击位置，然后取消选择引脚并隐藏标注...

我像这里一样实现了MyAnnotationView的hitTest:withEvent:方法：https://stackoverflow.com/a/13495795/440168 但是我在日志中看到，[super hitTest:withEvent:]从未返回nil。

这是我的MyAnnotationView方法：

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    BOOL isInside = [super pointInside:point withEvent:event];
    if (isInside)
        return YES;

    for (UIView * subview in self.subviews)
    {
        if ([subview isKindOfClass:[NSClassFromString(@"UICalloutView") class]])
            continue;

        CGPoint inPoint = [self convertPoint:point toView:subview];
        BOOL isInside = [subview pointInside:inPoint withEvent:nil];
        if (isInside)
            return YES;
    }

    return NO;
}

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    UIView * hitView = [super hitTest:point withEvent:event];
    if (hitView)
        return hitView;

    for (UIView * subview in self.subviews)
    {
        if ([subview isKindOfClass:[NSClassFromString(@"UICalloutView") class]])
            continue;

        CGPoint inPoint = [self convertPoint:point toView:subview];
        hitView = [subview hitTest:inPoint withEvent:event];
        if (hitView)
            return hitView;
    }

    return nil;
}

更新1：

以下是我添加自定义标注视图的代码：

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
    for (UIView * subview in view.subviews)
        subview.hidden = YES;
    [view addSubview:self.myCalloutView];
    self.myCalloutView.center = CGPointMake(view.bounds.size.width/2,-self.myCalloutView.bounds.size.height/2);

    // ...
}

更新2：

我刚刚使用了一些小技巧实现了我的MKMapView子类。但是这样可以工作！

@implementation HNPMapView

- (void)handleTap:(UITapGestureRecognizer *)recognizer
{
    for (UIView * v in [self findSubviewsOfClass:[MyCallout class]]) {
        CGPoint point = [recognizer locationInView:v];
        if (CGRectContainsPoint(v.bounds, point))
            return;
    }

    //[super performSelector:@selector(handleTap:) withObject:recognizer];
    void (*functionPointer)(id,SEL,...) = [MKMapView instanceMethodForSelector:@selector(handleTap:)];
    functionPointer(self,@selector(handleTap:),recognizer);
}

@end

使用此类别在视图层次结构中查找Callout：

@interface UIView (FindSubview)
- (NSArray *)findSubviewsOfClass:(Class)class;
@end
@implementation UIView (FindSubview)
- (NSArray *)findSubviewsOfClass:(Class)class
{
    NSMutableArray * found = [NSMutableArray array];
    for (UIView * subview in self.subviews)
    {
        if ([subview isKindOfClass:class])
            [found addObject:subview];
        [found addObjectsFromArray:[subview findSubviewsOfClass:class]];
    }
    return found;
}
@end

- k06a

1个回答

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- ytur · Accepted Answer

在hitTest方法中，你应该创建一个虚拟矩形来定义可触摸区域，根据你需要触摸的对象。

在UICalloutView中，你应该使用另一个循环来查找你的UITextView。

之后，你应该根据UITextView的尺寸和UICalloutView视图的原点来定义这个虚拟矩形。

此外，在for循环中不需要使用continue语句，因为当return被调用时，所有的循环都会立即停止。

所以你的hitTest方法应该像这样：

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    UIView * hitView = [super hitTest:point withEvent:event];

    if (hitView)
        return hitView;

    for (UIView * subview in self.subviews)
    {

        if ([subview isKindOfClass:[NSClassFromString(@"UICalloutView") class]]) {

            for(UIView *subTextView in subview.subviews){
                if([subTextView isKindOfClass:[UITextView class]]){

                    CGRect touchableArea = CGRectMake(subview.frame.origin.x, subview.frame.origin.y, subTextView.frame.size.width, subTextView.frame.size.height);
                    if (CGRectContainsPoint(touchableArea, point)){
                        return subTextView;
                    }
                }               
            }            
        }
    }    
    return nil;
}