iOS如何删除细边框线然后使用layer.cornerRadius

Question

I always use simple method to get view rounded corners

+ (void)setRoundedCornersByView:(UIView*) givenView roundAngle:(int)roundAngle borderWidth:(double)borderWidth borderColor:(UIColor*)borderColor alphaBorder:(double)alphaBorder {
    givenView.layer.cornerRadius = roundAngle;
    givenView.layer.borderColor = [[borderColor colorWithAlphaComponent:alphaBorder] CGColor];
    givenView.layer.borderWidth = borderWidth;
    givenView.layer.masksToBounds = YES;
}

But now i got thin border around rounded line, it's a thin line which have color like background color of rounded view

How to remove it without use onDraw, because it's not possible to do - because it's mean i must override all iOS controls where i need rounded corners.

Also u try use

UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bound byRoundingCorners:corners cornerRadii:cornerRadii];
CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = givenView.bounds;
maskLayer.path = maskPath.CGPath;
givenView.layer.mask = maskLayer;

but, as u can see, it's not fully rounded

Answer 1

Obviously, the layer bounds is not big enough to cover the whole image after the clip of corner drawing. So, you can enlarge the layer's bounds a little bit to cover the view's image. Like this:

+ (void)setRoundedCornersByView:(UIView *)givenView roundAngle:(int)roundAngle borderWidth:(double)borderWidth borderColor:(UIColor *)borderColor alphaBorder:(double)alphaBorder
{
  CGFloat offset = 1.f; // .5f is also good enough
  givenView.layer.cornerRadius = roundAngle + offset;
  givenView.layer.borderColor = [[borderColor colorWithAlphaComponent:alphaBorder] CGColor];
  givenView.layer.borderWidth = borderWidth + offset;
  givenView.layer.masksToBounds = YES;

  [givenView.layer setBounds:CGRectMake(-offset,
                                        -offset,
                                        CGRectGetWidth(givenView.frame)  + offset * 2.f,
                                        CGRectGetHeight(givenView.frame) + offset * 2.f)];
}