最近有个需求是要提取一段字符串中特定范围内的内容，查找资料后，使用的是Java中的Pattern.compile函数来实现对指定字符串的截取。记录下来查找的知识和应用，方便以后的查看。
Question How can you detect when the Table View is done drawing the cells? Issue I got two labels within the contentView of an UITableViewCell. The size of these labels are dynamic. I was able to d
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