ASPFontUtil.m

+ (CGFloat)topUIBaselineAdjustment:(ASPUITextElement)element traitCollection:(UITraitCollection *)contextTraitCollection {
    ASPUITextStyle elementTextStyle = [self mapUIElementToStyle:element];
    UIFont *font = [ASPFontUtil getUIFont:elementTextStyle traitCollection:contextTraitCollection];
    return floor(font.ascender - font.capHeight);
}

+ (CGFloat)bottomUIBaselineAdjustment:(ASPUITextElement)element traitCollection:(UITraitCollection *)contextTraitCollection {
    ASPUITextStyle elementTextStyle = [self mapUIElementToStyle:element];
    UIFont *font = [ASPFontUtil getUIFont:elementTextStyle traitCollection:contextTraitCollection];
    return -(floor(font.lineHeight - font.ascender));
}