Question

我想在化身与障碍物之间进行碰撞检测，因此，每当发生碰撞时，它都应打印“碰撞”，但即使这样也不起作用，所以问题是，它无法检测到任何碰撞。而且，如果发生碰撞，应该区分玩家和障碍物。

#Determine if we have an overlap between an input and an output
for item in canvas.find_all():
    tags = canvas.gettags(item)
    if tag in tags:
        if 'input' in tags:
            #current item is an input of the moved object
            #Get the items coordinates
            coords = canvas.coords(item)
            #Find if we overlap with other objects
            closest = canvas.find_overlapping(coords[0]-5,coords[1]-5,coords[2]+5,coords[3]+5)
            for closest_item in closest:
                closest_tags = canvas.gettags(closest_item)
                if 'output' in closest_tags:
                    #If we overlap with another object, print connected and the appropriate tags
                    print("connected", closest_tags, "-", tag)
                    connected_coords = canvas.coords(closest_item)
                    snapx = coords[0] - connected_coords[0]
                    snapy = coords[1] - connected_coords[1]
                    canvas.move(tag, -snapx, -snapy)

Answer 1

首先，avatarCategory和障碍物类别都为0，因为：UInt32 = 0 * 1 << 1 = 0，所以我们要解决此问题：

let avatarCategory: UInt32 = 1 << 0
let obstacleCategory: UInt32 = 1 << 1

现在contactTestBitMask表示您希望收到有关其联系人的通知的对象，因此您需要更改它：

avatar.physicsBody?.contactTestBitMask = obstacleCategory

和

obstacle.physicsBody?.contactTestBitMask = avatarCategor

暂时尝试

编辑：我关于碰撞和接触的循序渐进指南： https://stackoverflow.com/a/51041474/1430420

以及碰撞和接触的指南测试位掩码： https://stackoverflow.com/a/40596890/1430420

Swift 4中两个节点之间的冲突检测

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