iOS方法containsPoint不起作用

Question

我有这样的观点：

// .h file
@interface LayerBubbleView : UIView

/**
 *  click handler
 */
@property (nonatomic, copy) void (^clickHandler)(NSString* identifier, CAShapeLayer* layer);

-(instancetype)initWithFrame:(CGRect)frame withDataArray:(NSArray *)dataArray;

@end

// .m file
#import "BDPLayerBubbleView.h"

@interface BDPLayerBubbleView ()

@property (nonatomic, strong) NSMutableArray *paths;
@property (nonatomic, strong) NSMutableArray *identifiers;

@end

@implementation BDPLayerBubbleView

-(instancetype)initWithFrame:(CGRect)frame withDataArray:(NSArray *)dataArray {
    self = [self initWithFrame:frame];
    if (self) {

        _paths = [[NSMutableArray alloc] init];
        _identifiers = [[NSMutableArray alloc] init];
        for (int i = 0; i < dataArray.count; i++) {
            NSArray *data = dataArray[i];
            CGRect frame = [data[0] CGRectValue]; // please ignore here, just for demo
            CGFloat radius = [data[1] doubleValue];
            CGPoint center = [data[2] CGPointValue];
            UIColor *fillColor = data[3];
            UIColor *borderColor = data[4];
            NSString *identifier = data[5];

            CAShapeLayer *shapeLayer = [CAShapeLayer layer];
            UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRoundedRect:frame cornerRadius:radius];
            [_paths addObject:bezierPath];
            [_identifiers addObject:identifier];
            shapeLayer.path = [bezierPath CGPath];
            shapeLayer.strokeColor = [borderColor CGColor];
            shapeLayer.fillColor = [fillColor CGColor];
            shapeLayer.lineWidth = 0.5;
            shapeLayer.bounds = frame;
            shapeLayer.position = center;
            [self.layer addSublayer:shapeLayer];
        }
    }
    return self;
}

#pragma mark - Touch handling

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint touchPoint = [touch locationInView:self];

    for(int i=0;i<[_paths count];i++) {
        UIBezierPath* path = _paths[i];
        CAShapeLayer *shapeLayer = self.layer.sublayers[i];
        if ([path containsPoint:touchPoint] || [shapeLayer containsPoint:touchPoint])
        {
            NSString *identifier = _identifiers[i];

            if([self.layer.sublayers[i] isKindOfClass:CAShapeLayer.class] && [identifier length] > 0) {
                CAShapeLayer* l = self.layer.sublayers[i];

                if(_clickHandler) {
                    _clickHandler(identifier, l);
                }
            }
        }
    }
}

逻辑是，视图上有很多气泡层，当用户点击气泡时，我可以检测到哪个气泡层用户点击，这样我就可以触发相应的clickHandler并突出显示气泡层。

但是，[path containsPoint:touchPoint]和[shapeLayer containsPoint:touchPoint]都不会为所有子图层返回YES。我不确定我的代码有什么问题？

所以我建议使用CGPathContainsPoint和CGRectContainsPoint进行检测。我测试过，CGPathContainsPoint在CGRectContainsPoint DID工作时无效。

我现在对CG API和UIKit包装API之间的差异感到困惑。任何专家都能解释一下吗？我仍然希望containsPoint能够发挥作用。