UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.hotBg.bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(6, 6)];

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

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

? ? maskLayer.path= maskPath.CGPath;

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