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;
