CGPath errors

[dvkch]

Hi,

I discovered that everytime my app starts I get a lot of warnings:

<Error>: Error: this application, or a library it uses, has passed an invalid numeric value (NaN, or not-a-number) to CoreGraphics API and this value is being ignored.Please fix this problem.
<Error>: void CGPathCloseSubpath(CGMutablePathRef _Nullable): no current point.

After some debugging it appeared that some of the items you compute (center, etc) are invalid when the bounds property is empty. By adding a check on self.bounds in the method bellow I was able to prevent these messages. Maybe a better check could be to reset progressLineInset to CGRectZero if CGRectIsInfinite returns YES; that way if the bounds are not empty but not big enough for the line widths it would still prevent those errors.

- (CGRect)progressLineInset {
    static CGRect progressLineInset;
    if (CGRectIsEmpty(self.bounds))
        return CGRectZero;
    if (CGRectIsEmpty(progressLineInset)) {
        progressLineInset = CGRectIntegral(CGRectInset(self.bounds,
                            round(self.progressLineWidth + self.outerLineWidth),
                            round(self.progressLineWidth + self.outerLineWidth)));
    }
    return progressLineInset;
}

Thanks for considering!

[dvkch]

I just tried with CGRectIsInfinite, it doesn't work because in my case it's the rect origin that is wrong. Using those lines seems to work though

if (!isnormal(progressLineInset.origin.x) ||
    !isnormal(progressLineInset.origin.y) ||
    !isnormal(progressLineInset.size.width) ||
    !isnormal(progressLineInset.size.height))
{
    progressLineInset = CGRectZero;
}

[jurre]

Thanks @dvkch! I would love a pull request with those fixes if you wouldn't mind! Otherwise I'll try to get to it ASAP