NSUserDefaults 归档，数据持久化
我这里的方法适用于 model 归档，用户登录数据持久化
1,创建一个model ，要遵守协议 NSCoding
我创建 UserInfo
UserInfo.h 文件：
#import
@interface UserInfo : NSObject
@property (nonatomic, strong)NSString *userName;
@property (nonatomic, strong)NSString *userToken;
@end
UserInfo.m 文件：
- (void)encodeWithCoder:(NSCoder *)aCoder{
[aCoder encodeObject:self.userName forKey:@"userName"];
[aCoder encodeObject:self.userToken forKey:@"userToken"];
}
- (id)initWithCoder:(NSCoder *)aDecoder{
self = [super init];
if (self) {
self.userName = [aDecoder decodeObjectForKey:@"userName"];
self.userToken = [aDecoder decodeObjectForKey:@"userToken"];
}
return self;
}
2，在需要归档的地方 写归档的方法：
//归档
- (void)encode{
BOOL save = YES;
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setBool:save forKey:@"save"];
[userDefaults synchronize];
[NSKeyedArchiver archiveRootObject:_userList toFile:_path];
}
3，在需要解归档的地方写上解归档的方法：
//解归档
- (void)decode{
_userList = [[NSKeyedUnarchiver unarchiveObjectWithFile:_path ]mutableCopy];
NSLog(@"---解归档---%@", _userList);
for (UserInfo *user in _userList) {
NSLog(@"jieguidang %@", user.userToken);
}
}
- (void)loadData{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
_path = [[paths firstObject]stringByAppendingPathComponent:@"userInfo.archiver"];
BOOL save = NO;
NSLog(@"地址 :%@", _path);
NSUserDefaults *uerd = [NSUserDefaults standardUserDefaults];
if ([uerd boolForKey:@"save"]!= YES) {
_userList = [NSMutableArray array];
}else{
save = YES;
[uerd setBool:save forKey:@"save"];
[uerd synchronize];
[self decode];
}
}
5，用户登录成功后，把用户登录成功后的一些必要数据持久化，在用户再次进入 APP 的时候不用再重新登录：
UserInfo *userInfo = [[UserInfo alloc]init];
userInfo.userName = _telephoneNumb;
userInfo.userToken = news[@"data"][@"token"];
[_userList addObject:userInfo];
[self encode];