substringToIndex 'Int' is not convertible to 'String.Index'
2015-03-04 11:15
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在Beta3中工作正常，现在出现了一个奇怪的错误，而且我不知道怎么解决它。尝试了所有类似问题的解决方法。练练手
标记线上给了我相同的错误：手
在beta4中，Swift的String.Index处理再一次修改—你现在不能提供一个Int当String.Index被预期。处理它的方法是通过创建String.Index你需要使用预先方法：练练手
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