- (IBAction)save:(id)sender {        Person *p = [[Person alloc] init];    p.age = 18;    p.name = @"jack";        // 获取cache    NSString *cachePath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];        // 获取文件的全路径    NSString *filePath = [cachePath stringByAppendingPathComponent:@"person.data"];        // 把自定义对象归档    [NSKeyedArchiver archiveRootObject:p toFile:filePath];    }- (IBAction)read:(id)sender {        // 获取cache    NSString *cachePath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];        // 获取文件的全路径    NSString *filePath = [cachePath stringByAppendingPathComponent:@"person.data"];        // 解档    Person *p = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];        NSLog(@"%d,%@",p.age,p.name);    }