ios - SpriteKit - 停止物体弹跳

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我如何停止并阻止从屏幕顶部落到屏幕底部的弹跳。这是该对象的代码:

- (SKNode*)addRock {
    SKSpriteNode* rock = [SKSpriteNode spriteNodeWithImageNamed:@"asteroid"];
    rock.position=CGPointMake ([self makeRandomXWBetween:0 and:self.size.width],self.size.height);
    rock.name = @"rock";
    rock.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:rock.size];
    rock.physicsBody.usesPreciseCollisionDetection = YES;
    rock.physicsBody.allowsRotation = NO;
    [self addChild:rock];

    return self;
}

Answer 1

您需要设置SKPhysicsBody的恢复属性。

rock.physicsBody.restitution = 0.0;

根据 Apple 的 Documentation :

This property is used to determine how much energy the physics body loses when it bounces off another object. The property must be a value between 0.0 and 1.0. The default value is 0.2.