ios - iOS 3.x 上的 setShadowOffset 崩溃

Question

由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因:“* -[CALayer setShadowOffset:]:无法识别的选择器发送到实例 0x2f86d0”

cell.shadowView.layer.masksToBounds = NO;
cell.shadowView.layer.cornerRadius = 10.0;
cell.shadowView.layer.shadowOffset = CGSizeMake(0, 2);
cell.shadowView.layer.shadowRadius = 6;
cell.shadowView.layer.shadowOpacity = 0.5;

Answer 1

阅读 CALayer 类引用一切都写在苹果的文档中。