#import 
     
      #import "SBModel.h"#import "AutoCoding.h"@interface UserModel : SBModel 
      
       /* 命名方式 OC/Java都是遵守驼峰原则/波浪命名方法 在PHP, Linux里面命名是按照 _ 隔开 全小写命名 需要把 *///Login@property (nonatomic, strong) NSString *bid;@property (nonatomic, strong) NSString *mobile;@property (nonatomic, strong) NSString *token;// 表示自己当前用户 单例+ (id) currUser;// 保存当前用户myself+ (void) saveMyself;// 恢复当前用户+ (id) restoreMyself;+ (BOOL) isExistMyself;+ (void) deleteSaveMyself;// 把对象self拷贝到target对象中- (id) copyToObject:(id)target;@end//#define myself [UserModel currUser]#define myself ((UserModel *)[UserModel currUser])#import "UserModel.h"@implementation UserModel+ (id) currUser {    static UserModel *um;    if (um == nil)        um = [[UserModel alloc] init];    return um;}#pragma mark - 使用AutoCoding自动进行归档static inline NSString * myselfSaveFile() {    return [NSHomeDirectory() stringByAppendingString:@"/Library/Caches/myself"];}+ (void) saveMyself {    NSString *path = myselfSaveFile();    // 使用自动归档开源库 直接把对象写入到文件中    [myself writeToFile:path atomically:YES];    }// 恢复当前用户+ (id) restoreMyself {    NSString *path = myselfSaveFile();    // 从path路径找到并解档案    UserModel *um = [self objectWithContentsOfFile:path];    return um;}+ (BOOL) isExistMyself {    NSString *path = myselfSaveFile();    id obj = [self objectWithContentsOfFile:path];        if ([obj isKindOfClass:[self class]]) {        return YES;    }    return NO;}+ (void) deleteSaveMyself {    NSString *path = myselfSaveFile();    [[NSFileManager defaultManager] removeItemAtPath:path error:nil];}#pragma mark - 自动实现了拷贝NSCopying功能- (id)copyWithZone:(NSZone *)zone {    id copy = [[[self class] alloc] init];    for (NSString *key in [self codableProperties]) {        [copy setValue:[self valueForKey:key] forKey:key];    }    return copy;}// 把self存于target对象中- (id) copyToObject:(id)target {    for (NSString *key in [self codableProperties]) {        [target setValue:[self valueForKey:key] forKey:key];    }    return target;}@end