When calculating multiline string height with some fonts I get wrong font heights for
size (width, 0)
Solution was found here:
And here is fixed function:
static CGSize _calculateStringSize(NSString *str, id font, CGSize *constrainSize)
{
if (constrainSize->width > 0 && constrainSize->height == 0)
{
static UITextView * textView = [[UITextView alloc] init];
textView.text = str;
textView.font = font;
textView.frame = CGRectMake(0.0f, 0.0f, constrainSize->width, CGFLOAT_MAX);
[textView sizeToFit];
CGSize dim = CGSizeZero;
dim.width = constrainSize->width;
dim.height = textView.frame.size.height;
return dim;
}
CGSize textRect = CGSizeZero;
textRect.width = constrainSize->width > 0 ? constrainSize->width
: 0x7fffffff;
textRect.height = constrainSize->height > 0 ? constrainSize->height
: 0x7fffffff;
return [str sizeWithFont:font constrainedToSize:textRect lineBreakMode:NSLineBreakMode::NSLineBreakByWordWrapping];
}
It creates one static UITextView and never releases it… but it’s not so big price for right calculations 
Could anyone update sources?