iOS UIView 切其中某一个圆角

    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.editingView.bounds      byRoundingCorners:UIRectCornerBottomRight    cornerRadii:CGSizeMake(10, 10)];
    CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
    maskLayer.frame = self.editingView.bounds;
    maskLayer.path = maskPath.CGPath;
    self.editingView.layer.mask = maskLayer;