NSString *Path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filename = [Path stringByAppendingPathComponent:@"test.plist"];
[NSKeyedArchiver archiveRootObject:obj1 toFile:filename];
[NSKeyedUnarchiver unarchiveObjectWithFile:filename];
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