How to create custom SKActions?

问题

Hello all I want to do is create a SKAction which does something similar to wheelRight.physicsBody.velocity = CGVectorMake(0, 1000); to a physics object.

回答1:

Use SKAction runBlock: method:

SKAction *changeVelocity = [SKAction runBlock:^{
        wheelRight.physicsBody.velocity = CGVectorMake(0, 1000);
    }];
SKAction sequence = [SKAction sequence:@[..., changeVelocity, ..., ...]];
[wheelRight runAction:sequence];

来源：https://stackoverflow.com/questions/21400928/how-to-create-custom-skactions