? UIRectCornerTopLeft = 1 << 0, ?(左上)

? ? UIRectCornerTopRight? ? = 1 << 1, ?(右上)

? ? UIRectCornerBottomLeft? = 1 << 2, ?(左下)

? ? UIRectCornerBottomRight = 1 << 3, ?(右下)

? ? UIRectCornerAllCorners? = ~0UL

UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.BID.bounds byRoundingCorners:UIRectCornerBottomRight cornerRadii:CGSizeMake(10*YZAdapter, 0)];

? ? ? ? CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];

? ? ? ? maskLayer.frame = self.BID.bounds;

? ? ? ? maskLayer.path = maskPath.CGPath;

? ? ? ? self.BID.layer.mask = maskLayer;