(): .jumpState: .rect.y >= .lowest_y: .jumpValue = -.rect.y <= .lowest_y-.jumpHeight: .jumpValue = .rect.y += .jumpValue .rect.y >= .lowest_y: .jumpState =
您好读者!请问您遇到了什么问题,图书配套的源码可以正常运行的,可以参考一下!