NSDictionary与NSDates作为键 [英] NSDictionary with NSDates as keys
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问题描述
有可能有一个NSdictionary，其中的键是NSDates，并且它可写/可归档到磁盘？
Is it possible to have an NSdictionary where the keys are NSDates and also have it writeable/archiveable to disk?
推荐答案
不使用属性列表，因为只允许字符串键。你应该能够使用 NSKeyedArchiver 编写它，但是它的缺点是更不透明的格式。或者，你当然可以做一个字典的副本，你将日期转换为字符串。
Not using property lists, as only string keys are allowed there. You should be able to write it using NSKeyedArchiver, but that has the disadvantage of being a more opaque format. Alternatively, you could of course make a copy of the dictionary where you convert the dates to strings.
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