NSUserDefaults写作和阅读对象定义自己

Person.h

#import <Foundation/Foundation.h>

#import "Face.h"

@interface Person : NSObject <NSCoding>

@property (nonatomic, strong) NSString      *personId;
@property (nonatomic, strong) NSString      *name;
@property (nonatomic, assign) NSInteger      age;
@property (nonatomic, strong) NSArray       *photos;
@property (nonatomic, strong) NSDictionary  *phoneNumber;

@property (nonatomic, strong) Face          *face;

@end

Person.m

#import "Person.h"

@implementation Person
@synthesize personId    = _personId;
@synthesize name        = _name;
@synthesize age         = _age;
@synthesize photos      = _photos;
@synthesize phoneNumber = _phoneNumber;
@synthesize face        = _face;

- (id)initWithCoder:(NSCoder *)aDecoder
{
if(self = [super init])
{
self.personId       = [aDecoder decodeObjectForKey:@"id"];
self.name           = [aDecoder decodeObjectForKey:@"name"];
self.age            = [[aDecoder decodeObjectForKey:@"age"] integerValue];
self.photos         = [aDecoder decodeObjectForKey:@"photos"];
self.phoneNumber    = [aDecoder decodeObjectForKey:@"phoneNumber"];
self.face           = [aDecoder decodeObjectForKey:@"face"];
}
return self;
}

- (void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:self.personId forKey:@"id"];
[aCoder encodeObject:self.name forKey:@"name"];
[aCoder encodeObject:[NSNumber numberWithInteger:self.age] forKey:@"age"];
[aCoder encodeObject:self.photos forKey:@"photos"];
[aCoder encodeObject:self.phoneNumber forKey:@"phoneNumber"];
[aCoder encodeObject:self.face forKey:@"face"];
}

Face.h

#import <Foundation/Foundation.h>

@interface Face : NSObject <NSCoding>

@property (nonatomic, strong) NSString *head;
//@property (nonatomic, strong) NSString *eyes;
//@property (nonatomic, strong) NSString *nose;
//@property (nonatomic, strong) NSString *mouth;
//@property (nonatomic, strong) NSString *ears;

@end

Face.m

#import "Face.h"

@implementation Face

- (id)initWithCoder:(NSCoder *)aDecoder
{
if(self = [super init])
{
self.head   = [aDecoder decodeObjectForKey:@"head"];
}
return self;
}

- (void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:self.head forKey:@"head"];
}

@end

写入和读取操作

Person *person = [[Person alloc] init];
person.personId = @"123456789";
person.name = @"Hunk";
person.age = 10;
person.photos = @[@"a.png", @"b.png", @"c.png"];
person.phoneNumber = @{@"mobile_phone" : @"987654321", @"work" : @"01012345678"};
Face *face = [[Face alloc] init];
face.head  = @"Round shape";
person.face = face;

NSData *personData0 = [NSKeyedArchiver archivedDataWithRootObject:person];

[[NSUserDefaults standardUserDefaults] setObject:personData0 forKey:@"person"];
[[NSUserDefaults standardUserDefaults] synchronize];

NSData *personData1 = [[NSUserDefaults standardUserDefaults] objectForKey:@"person"];
Person *person1 = [NSKeyedUnarchiver unarchiveObjectWithData:personData1];