{ UILabel *lb=[[UILabel alloc]initWithFrame:CGRectMake(offset_xx, offset_yy, 0, 0)]; [lb setText:@"fawfwefwaefaewwewaefewafwefawefawefawefwaefwaefawefawefawefawafewfawefawfweafwaefawefawefawfewafawefawfawfweafwafawefwaefawefwaefaweewafwefawefawefawefwaefwaefaewafwefawefawefawefwaefwaefaewafwefawefawefawefwaefwaefaewafwefawefawefawefwaefwaefaewafwefawefawefawefwaefwaefa"]; [lb setTextColor:[UIColor grayColor]]; [lb setNumberOfLines:0]; UIFont *font=[UIFont systemFontOfSize:13]; [lb setFont:font]; //设置行高上限 CGSize size=CGSizeMake(320, 4000); //计算frame的高度 CGRect lb_size=[lb.text boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil] context:nil]; [lb setFrame:lb_size]; [sv addSubview:lb]; }