Question

我有一个带有单个子视图的MKMapView：

MKMapView *mapView = [[MKMapView alloc] initWithFrame:[UIScreen mainScreen].bounds];
UIView *subView = [[UIView alloc] initWithFrame:CGRectMake(0, 200, 200, 200)];
subView.backgroundColor = [UIColor grayColor];
[mapView addSubview:subView];

我希望因为子视图不处理任何触摸事件，所有触摸事件将被传递到父地图视图（通过响应者链）。然后我会期望子视图中的平移和捏合会平移和捏合地图。

遗憾的是，情况似乎并非如此。有没有人知道将地图视图输入响应者链的方法？

我意识到在我的子视图中覆盖hitTest可以达到我在这里期待的效果，但是我不能使用这种方法，因为我需要在子视图中回复其他手势。

Answer 1

如何使用UIGestureRecognizers处理所有手势（正确设置以忽略其他手势识别器或与他们同时触发）添加到mapView并禁用子视图的userInteractionEnabled？

我使用以下代码在mapView上收听Taps而不会干扰标准手势：

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(mtd_handleMapTap:)];

// we require all gesture recognizer except other single-tap gesture recognizers to fail
for (UIGestureRecognizer *gesture in self.gestureRecognizers) {
    if ([gesture isKindOfClass:[UITapGestureRecognizer class]]) {
        UITapGestureRecognizer *systemTap = (UITapGestureRecognizer *)gesture;

        if (systemTap.numberOfTapsRequired > 1) {
            [tap requireGestureRecognizerToFail:systemTap];
        }
    } else {
        [tap requireGestureRecognizerToFail:gesture];
    }
}


- (void)mtd_handleMapTap:(UITapGestureRecognizer *)tap {
if ((tap.state & UIGestureRecognizerStateRecognized) == UIGestureRecognizerStateRecognized) {

        // Get view frame rect in the mapView's coordinate system
        CGRect viewFrameInMapView = [self.mySubview.superview convertRect:self.mySubview.frame toView:self.mapView];
        // Get touch point in the mapView's coordinate system
        CGPoint point = [tap locationInView:self.mapView];

        // Check if the touch is within the view bounds
        if (CGRectContainsPoint(viewFrameInMapView, point)) {
             // tap was on mySubview
        }
}

}

MKMapView和响应者链

1 个答案: