在这篇文章中使用了`archiveRootObject: toFile:、initForWritingWithMutableData:`和`archivedDataWithRootObject:`三种类型归档方法,它们区别如下: 源码地址:github.com/pro648/BasicDemos-iOS/tree/master/KeyedArchiver 详细介绍:github.com/pro648/tips/wiki/数据存储之归档解档-NSKeyedArchiver-NSKeyedUnarchiver - archiveRootObject: toFile:不能决定如何处理归