Objective c 为触摸定义精灵形状

我正在尝试使用以下代码向NSArray中的精灵添加形状：

theSprites = [[NSMutableArray alloc] init];

CCSprite *sprite1 = [CCSprite spriteWithSpriteFrameName:@"sprite1"];
sprite1.position = ccp(winSize.width/2, sprite1.contentSize.height/2);
[self addChild:sprite1 z:3];
sprite1Path=CGPathCreateMutable();
CGPathMoveToPoint(sprite1Path, NULL, 0, 286);
CGPathAddLineToPoint(sprite1Path, NULL, 0, 0);
CGPathAddLineToPoint(sprite1Path, NULL, 768, 0);
CGPathAddLineToPoint(sprite1Path, NULL, 768, 208);
CGPathAddLineToPoint(sprite1Path, NULL, 356, 258);
CGPathCloseSubpath(sprite1Path);
[theSprites addObject:sprite1];

CCSprite *sprite2 = [CCSprite spriteWithSpriteFrameName:@"sprite2"];
sprite2.position = ccp(winSize.width/2, sprite2.contentSize.height/2);
[self addChild:sprite2 z:4];
sprite2Path=CGPathCreateMutable();
CGPathMoveToPoint(sprite2Path, NULL, 0, 254);
CGPathAddLineToPoint(sprite2Path, NULL, 0, 0);
CGPathAddLineToPoint(sprite2Path, NULL, 768, 0);
CGPathAddLineToPoint(sprite2Path, NULL, 768, 144);
CGPathAddLineToPoint(sprite2Path, NULL, 494, 168);
CGPathAddLineToPoint(sprite2Path, NULL, 204, 212);
CGPathCloseSubpath(sprite2Path);
[theSprites addObject:sprite2];

然后，我试图指定只有这个定理是可论证的。我创建了一个类似于cocos2d教程中的函数

- (void)selectSprite:(CGPoint)touchLocation {
CCSprite *touchSprite = nil;
for (CCSprite *sprite in theSprites) {
  if (CGRectContainsPoint(sprite.boundingBox, touchLocation)) {            
    touchSprite = sprite;
    }  }  }

现在我是斯塔克！ 我不知道如何将CGRectContainsPoint更改为CGPathContainsPoint。。。

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我不知道如何用一个语句指定两个形状。。。或者创建if（）if（）构造…

我看到两个问题。首先，需要将路径附加到精灵。您应该子类化

CCSprite

，并给它一个

boundingPath

属性：

MySprite.h MySprite.m 然后，在创建精灵时设置

shapePath

属性：

MySprite *sprite1 = [MySprite spriteWithSpriteFrameName:@"sprite1"];
// ... blah blah blah all the stuff you did to init sprite1 and sprite1Path
CGPathCloseSubpath(sprite1Path);
sprite1.shapePath = sprite1Path;
[theSprites addObject:sprite1];

现在，您可以在精灵中测试触摸，如下所示：

- (MySprite *)spriteAtPoint:(CGPoint)point {
    for (MySprite *sprite in theSprites) {
        CGPoint spriteOrigin = sprite.boundingBox.origin;
        CGPoint pointInSprite = CGPointMake(point.x - spriteOrigin.x, point.y - spriteOrigin.y);
        if (CGPathContainsPoint(sprite.shapePath, NULL, pointInSprite, false))
            return sprite;
        }
    }
}

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当我尝试添加

@property（非原子）CGPath shapePath时有一个“必须使用'struct'标记来引用类型'CGPath'”。我需要添加“struct”吗？
MySprite *sprite1 = [MySprite spriteWithSpriteFrameName:@"sprite1"];
// ... blah blah blah all the stuff you did to init sprite1 and sprite1Path
CGPathCloseSubpath(sprite1Path);
sprite1.shapePath = sprite1Path;
[theSprites addObject:sprite1];

- (MySprite *)spriteAtPoint:(CGPoint)point {
    for (MySprite *sprite in theSprites) {
        CGPoint spriteOrigin = sprite.boundingBox.origin;
        CGPoint pointInSprite = CGPointMake(point.x - spriteOrigin.x, point.y - spriteOrigin.y);
        if (CGPathContainsPoint(sprite.shapePath, NULL, pointInSprite, false))
            return sprite;
        }
    }
}