ios之NSUserDefault存储自定义类型的对象

ios中存储小数据的类NSUSerDefault只能存储NSNumber（Integer、Float、Double），NSString，NSDate，NSArray，NSDictionary，BOOL类型，要是存储其他类型的对象，会提示或报错“Attempt to set a
non-property-list object”。其实存储自定义类型对象也是可以的，步骤如下：

1.自定义类需继承NSCoding：

2.存储的时候用归档转换成NSData，取出的时候从NSData再转换成需要的类型

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self userdefaultTest];
}

#pragma mark -NSUserDefault存储自定义对象
-(void)userdefaultTest
{
CustomClass *cc = [[CustomClass alloc] init];
cc.name = @"helly";
cc.age = 24;

NSUserDefaults *userd = [NSUserDefaults standardUserDefaults];
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:cc];
[userd setObject:data forKey:@"person"];
[userd synchronize];

CustomClass *ccc = (CustomClass *)[NSKeyedUnarchiver unarchiveObjectWithData:[userd objectForKey:@"person"]];
NSLog(@"ccc=%@",ccc);

}