每次都逼我翻代码   这次干脆写博客里面算了 哈哈哈

 

    CGSize maxSize = CGSizeMake(ScreenWith-30,NSIntegerMax);

    CGSize labelsize = [addressContentLabel.text boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:addressContentLabel.font} context:nil].size;