You need to use NSLineBreakByWordWrapping
in iOS 6
For your code try this:
NSString *string = @"bla";
CGSize s = [string sizeWithFont:[UIFont systemFontOfSize:20]
constrainedToSize:CGSizeMake(self.view.bounds.size.width - 40, CGFLOAT_MAX) // - 40 For cell padding
lineBreakMode:NSLineBreakByWordWrapping];
an example on a label would be:
[label setLineBreakMode:NSLineBreakByWordWrapping];
Instead of
label.lineBreakMode = UILineBreakModeWordWrap;
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