Question

我想在我的六边形精灵周围创建触控区域（CGMutablePathRefs）。我的目标是创建名称为hexTouchArea1，hexTouchArea2等的键，因此我开始将它们存储在NSMutableDictionary中。但是我不能在其中存储CGMutablePathRefs。我该如何解决这个问题？

for (int i = 0; i < hexCount; i++) {
            hexTouchAreas = [[NSMutableDictionary alloc] init];
            CGPoint touchAreaOrigin = ccp(location.x -22, location.y-40);
            NSString *touchAreaKey = [NSString stringWithFormat:@"hexTouchArea%d",i];
            CGMutablePathRef hexTouchArea = CGPathCreateMutable();
            hexTouchArea = [self drawHexagonTouchArea:touchAreaOrigin];

            [hexTouchAreas setObject:hexTouchArea forKey:touchAreaKey];
            NSLog(@"the touchareas are %@", hexTouchAreas);
}

drawHexagonTouchArea返回一个CGMutablePathRef：

-(CGMutablePathRef) drawHexagonTouchArea:(CGPoint)origin
{

    CGMutablePathRef path = CGPathCreateMutable();
    CGPoint newloc = CGPointMake(origin.x, origin.y);

    CGPathMoveToPoint(path, NULL, newloc.x, newloc.y);
    CGPathAddLineToPoint(path, NULL, newloc.x -22,newloc.y + 38);
    CGPathAddLineToPoint(path, NULL, newloc.x + 0, newloc.y + 76);
    CGPathAddLineToPoint(path, NULL, newloc.x + 46,  newloc.y + 76);
    CGPathAddLineToPoint(path, NULL, newloc.x +66,newloc.y + 40);
    CGPathAddLineToPoint(path, NULL, newloc.x +44, newloc.y + 0);
    CGPathCloseSubpath(path);
    return path;
}

AND：如何将这些触摸区域分配给CCSprites，这样如果精灵旋转，它们不会单独移动？

Answer 1

您可以使用NSValue封装CGMutablePathRef，然后将其添加到字典中：

NSValue *pathAsValue = [NSValue valueWithPointer:hexTouchArea];
[dictionary setObject:pathAsValue forKey:yourKeyHere];

如果需要，请使用：

NSValue *myPathAsValue = [dictionary objectForKey:yourKeyHere];
CGMutablePathRef pathRef = [myPathAsValue pointerValue];

Answer 2

变化：

[hexTouchAreas setObject:hexTouchArea forKey:touchAreaKey];

为：

[hexTouchAreas setObject:(id)hexTouchArea forKey:touchAreaKey];

CGPath和CGMutablePath只是不透明的CFType对象类型，可以将它们（通过强制转换为id）添加到任何免费的Cocoa容器类中桥接到他们的CoreFoundation对应部分。

并观察从drawHexagonTouchArea

返回的结果的内存泄漏

将CGMutablePathRef存储在NSMutableDictionary中？

2 个答案: