9

我创建了SKScene继承类。问题是关于物理体方法的接触

- (void)didBeginContact:(SKPhysicsContact *)contact

不被调用的解决方案可能很简单，但作为精灵套件的初学者，我坚持这一点。

下面是代码

#import "MyScene.h"
@interface MyScene ()
@property BOOL contentCreated;
@end
@implementation MyScene
- (id)initWithSize:(CGSize)size {
    self = [super initWithSize:size];
    if (self) {
        self.physicsWorld.contactDelegate = self;
        self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame];
    }
    return self;
}
- (void)didMoveToView:(SKView *)view
{
    if (!self.contentCreated) {
        [self buildWorld];
        self.physicsWorld.contactDelegate = self;
    }
}

#pragma mark - World Building
- (void)buildWorld {
    NSLog(@"Building the world");
    SKSpriteNode * sprite1 = [[SKSpriteNode alloc] initWithColor:[SKColor grayColor] size:CGSizeMake(100,100)];
    sprite1.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(100,100)];
    sprite1.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame) +100);

    SKSpriteNode * sprite2 = [[SKSpriteNode alloc] initWithColor:[SKColor grayColor] size:CGSizeMake(100,100)];
    sprite2.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(100,100)];
    sprite2.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame) - 100);


    [self addChild:sprite1];
    [self addChild:sprite2];
}
- (void)didBeginContact:(SKPhysicsContact *)contact
{
    NSLog(@"contact");
}

@end

提前致谢。

4

1 回答 1

13

从SKPhysicsWorld文档中：

当两个物理体重叠并且其中一个物理体的contactTestBitMask属性与另一个物理体的属性重叠时，将创建接触categoryBitMask。

您必须分配物理体 acategoryBitMask和 a contactTestBitMask。您想首先创建您的类别：

static const uint32_t sprite1Category = 0x1 << 0;
static const uint32_t sprite2Category = 0x1 << 1;

接下来，分配类别和接触测试位掩码：

sprite1.physicsBody.categoryBitMask = sprite1Category;
sprite1.physicsBody.contactTestBitMask = sprite2Category;

sprite2.physicsBody.categoryBitMask = sprite2Category;
sprite2.physicsBody.contactTestBitMask = sprite1Category;

文档中的注释SKPhysicsBody：

为了获得最佳性能，请仅在联系人掩码中为您感兴趣的交互设置位。

于 2013-10-30T20:59:34.540 回答