调整label换行行间距

   label.frame =CCR(0,0,SCREEN_WIDTH -30,100000);

    NSMutableAttributedString *attributedString = [[NSMutableAttributedStringalloc]initWithString:label.text];

    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStylealloc]init];

    [paragraphStyle setLineSpacing:lineSpace];//调整间距

    

    [attributedString addAttribute:NSParagraphStyleAttributeNamevalue:paragraphStylerange:NSMakeRange(0, [label.textlength])];

    label.attributedText = attributedString;

    [label sizeToFit];

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