Swift round up for respondsToSelector() and sizeWithFont()

[kutyel]

I am translating into Swift the following Objective-C block code which belongs to JBChartInformationView.m (at the demo project):

- (void)layoutSubviews
{
    CGSize valueLabelSize = CGSizeZero;

    if ([self.valueLabel.text respondsToSelector:@selector(sizeWithAttributes:)])
    {
        valueLabelSize = [self.valueLabel.text sizeWithAttributes:@{NSFontAttributeName:self.valueLabel.font}];
    }
    else
    {
        valueLabelSize = [self.valueLabel.text sizeWithFont:self.valueLabel.font];
    }

    CGFloat xOffset = ceil((self.bounds.size.width - valueLabelSize.width) * 0.5);
    self.valueLabel.frame = CGRectMake(xOffset, ceil(self.bounds.size.height * 0.5) - ceil(valueLabelSize.height * 0.5), valueLabelSize.width, valueLabelSize.height);
}

This code basically loads dynamically an UILabel in the middle of the UIView respecting the relative font size and the padding of the view. This is the code I currently have:

override func layoutSubviews()
{
    var valueSize = CGSizeZero

    if valueLabel.text != nil {
        if ((self.valueLabel.text! as NSString).respondsToSelector(Selector("sizeWithAttributes:"))){
            valueSize = (self.valueLabel.text! as NSString).sizeWithAttributes([NSFontAttributeName:self.valueLabel.font])
        }
    }

   let xOffSet = ceil((self.bounds.size.width - valueSize.width) * 0.5)
   valueLabel.frame = CGRectMake(xOffSet, ceil(self.bounds.size.height * 0.5) - ceil(valueSize.height * 0.5), valueSize.width, valueSize.height)
}

This is not working correctly cause the label appears in the left-top corner of the view. I believe there is some round up in swift for not using the respondsToSelector() method but do not know how. I also want to avoid using sizeWithFont() cause it's _deprecated_.

Any help will be very welcomed!

[terryworona]

Hey @kutyel, you may find better luck asking on stack overflow (or similar).

I'm going to close this issue as it has no correlation to the core charting libraries.

FWW, I would start with inspecting the valueLabel and valueSize properties.