在 Sprite Kit 中停止节点旋转答案

【问题标题】：Stop node rotation in Sprite Kit在 Sprite Kit 中停止节点旋转
【发布时间】：2015-10-26 19:33:27
【问题描述】：

我不知道如何阻止节点旋转。为什么allowRotation 没有禁用它？
以下是我描述我的节点的方式：

SKSpriteNode *badguy = [SKSpriteNode spriteNodeWithTexture:[self.spriteAtlas textureNamed:@"test"]];
badguy.texture.filteringMode = SKTextureFilteringNearest;
badguy.physicsBody.angularVelocity = 0;
badguy.physicsBody.allowsRotation = NO;
badguy.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(32, 32)];    
badguy.physicsBody.velocity = CGVectorMake(0, 0);
badguy.physicsBody.categoryBitMask = CollisionTypeEnemy;
badguy.physicsBody.contactTestBitMask = CollisionTypePlayer | CollisionTypeWall | CollisionTypeEnemy;
badguy.physicsBody.collisionBitMask = CollisionTypeWall | CollisionTypePlayer | CollisionTypeEnemy;
badguy.physicsBody.mass = 10000;
badguy.physicsBody.restitution = 0;
badguy.physicsBody.dynamic = YES;
badguy.zPosition = 10;

更新时我调用这个方法：

-(void)enemiesFollow
{

    [self.world enumerateChildNodesWithName:@"badGuy" usingBlock:^(SKNode * _Nonnull badGuyNode, BOOL * _Nonnull stop) {
        if((SDistanceBetweenPoints(self.player.position, badGuyNode.position) < 100)&&
           (SDistanceBetweenPoints(self.player.position, badGuyNode.position) > 32))
        { 
            SKAction * actionMove = [SKAction moveTo:self.player.position duration:2.0];
            [badGuyNode runAction:actionMove];  
        }else{
            [badGuyNode removeAllActions];
        }

    }];

}

【问题讨论】：

请更新您的代码，举例说明您如何移动该（旋转）节点。

标签： sprite-kit

【解决方案1】：

感谢Skyler Lauren's 的建议，我很确定问题出在以下几行：

SKSpriteNode *badguy = [SKSpriteNode spriteNodeWithTexture:[self.spriteAtlas textureNamed:@"test"]];
badguy.texture.filteringMode = SKTextureFilteringNearest;
badguy.physicsBody.angularVelocity = 0;
badguy.physicsBody.allowsRotation = NO;
badguy.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(32, 32)];

关键是您不能在创建实际实体之前设置物理实体的属性。所以，在你创建一个物理体之后移动这些线，你会很好的，就像这样：

SKSpriteNode *badguy = [SKSpriteNode spriteNodeWithColor:[SKColor greenColor] size:CGSizeMake(32,32)];
badguy.texture.filteringMode = SKTextureFilteringNearest;
badguy.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(32, 32)];
badguy.physicsBody.angularVelocity = 0;
badguy.physicsBody.allowsRotation = YES;

【讨论】：