sizeWithFont棄用ERROR，如何解決？

Question

我嘗試使用sizeWithAtrributes，但它只是打破了，不知道我做錯了這是拿出sizeWithFont:minFontSize:actualFont:forWidth:lineBreakMode:被棄用iOS7錯誤：

if (theRect.size.width > self.bounds.size.width - rightIconNeeds - leftIconNeeds) { 
    CGFloat finalSize = realLabel.font.pointSize; 
    theRect.size = [realLabel.text sizeWithFont:realLabel.font 
            minFontSize:realLabel.font.pointSize * realLabel.minimumScaleFactor 
           actualFontSize:&finalSize 
             forWidth:self.bounds.size.width - rightIconNeeds - leftIconNeeds 
            lineBreakMode:realLabel.lineBreakMode]; 
} 

Answer 1

我用這個來代替：

CGRect r = [str boundingRectWithSize:CGSizeMake(sizeLimit.width, CGFLOAT_MAX) 
          options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading 
          attributes:@{NSFontAttributeName:realLabel.font} 
          context:nil]; 
r = CGRectIntegral(r).size;