iOS 【NSKeyedArchier】归档解档类名调整问题

归档解档的是自定义的对象，
归档时是A名字，当对象名调整之后，解档是B名字；

*** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: '*** -[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of class (VIVOolbarPal) for key (kArchiverDataKey) because no class named "VIVOolbarPal" was found; the class needs to be defined in source code or linked in from a library (ensure the class is part of the correct target). If the class was renamed, use setClassName:forClass: to add a class translation mapping to NSKeyedUnarchiver'
terminating with uncaught exception of type NSException

上面错误提示来源，
1、NSKeyedArchiver 归档时，对象类名是这个VIVOolbarPal；

VIVOolbarPal *account = [[VIVOolbarPal alloc] init];
NSMutableData *data = [[NSMutableData alloc] init];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
[archiver encodeObject:account forKey:kArchiverDataKey];

2、运行项目，手机APP上本地归档的是VIVOolbarPal；

3、VIVOolbarPal 类名调整为新【ABCOolbarPal】类名；

4、再次运行项目，读取之前APP归档信息报错：

NSData *data = [[NSData alloc] initWithContentsOfFile:[STL_PATH_DIRECTORY stringByAppendingPathComponent:kUserFileName]];
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
ABCVIVOolbarPal *account = [unarchiver decodeObjectForKey:kArchiverDataKey];

'*** -[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of class (VIVOolbarPal)；

1、简单的方式（获取时，设置之前的类）：

NSData *data = [[NSData alloc] initWithContentsOfFile:[STL_PATH_DIRECTORY stringByAppendingPathComponent:kUserFileName]];
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
//设置对应的类
[unarchiver setClass: ABCVIVOolbarPal.class forClassName:@"VIVOolbarPal"];

ABCVIVOolbarPal *account = [unarchiver decodeObjectForKey:kArchiverDataKey];

2、归档与解档时，都用指定的名字（如ABCCC)：

归档

VIVOolbarPal *account = [[VIVOolbarPal alloc] init];
NSMutableData *data = [[NSMutableData alloc] init];
[NSKeyedArchiver setClassName:@"ABCCC" forClass:account.class];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
[archiver encodeObject:account forKey:kArchiverDataKey];

解档

NSData *data = [[NSData alloc] initWithContentsOfFile:[STL_PATH_DIRECTORY stringByAppendingPathComponent:kUserFileName]];
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
//设置对应的类
//[unarchiver setClass: ABCVIVOolbarPal.class forClassName:@"VIVOolbarPal"];
[unarchiver setClass: ABCVIVOolbarPal.class forClassName:@"ABCCC"];

ABCVIVOolbarPal *account = [unarchiver decodeObjectForKey:kArchiverDataKey];