iOS Swift3.0 OC 数据储存--归档

一、Swift 3.0

1、model

class userModel: NSObject,NSCoding {

    var account: String = ""
    var regmobile: String = ""
    var sec1_question: String = ""

    func encode(with aCoder: NSCoder) {
        aCoder.encode(account, forKey:"account")
        aCoder.encode(regmobile, forKey:"regmobile")
        aCoder.encode(sec1_question, forKey:"sec1_question")
        aCoder.encode(expert_audit, forKey:"expert_audit")

    }

    required init?(coder aDecoder: NSCoder) {
        super.init()
        account = (aDecoder.decodeObject(forKey:"account")as? String)!
        status = (aDecoder.decodeObject(forKey:"status")as? String)!
        nickname = (aDecoder.decodeObject(forKey:"nickname")as? String)!

    }

}

2、 归解档

  //  路径：
let userAccountPath = "\(NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).first!)/southDream.data"

  //归档
            NSKeyedArchiver.archiveRootObject(model, toFile: userAccountPath + "/userModel")

//解档
            if NSKeyedUnarchiver.unarchiveObject(withFile: userAccountPath) != nil {

              let  model = NSKeyedUnarchiver.unarchiveObject(withFile: userAccountPath) as? userModel
            }

二、OC

四种数据持久化方式 http://www.cocoachina.com/ios/20160617/16739.html

//

//归档数据，并用二进制写入文件
NSMutableData *data = [NSMutableData data];
NSKeyedArchiver *keyedArchiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
[keyedArchiver encodeObject:Users forKey:@"users"];//Users已知的保存用户信息的数组
[keyedArchiver finishEncoding];
[data writeToFile:@"归档数据保存路径" atomically:YES];
[objc] view plain copy print?
//读取上面已经保存好的文件，并反归档后在程序中使用数据
NSData *newData = [NSData dataWithContentsOfFile:@"归档数据保存路径"];
NSKeyedUnarchiver *keyedUnArchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:newData];
NSArray *users = [keyedUnArchiver decodeObjectForKey:@"users"];
for (User *user in users) {
    NSLog(@"name = %@  pw = %@",u.name,u.password);
}  

注意:需要归档的数据中如果含有自定义的对象，那么该对象需遵守<NSCoding>协议，并重写如下方法:
[objc] view plain copy print?
- (void)encodeWithCoder:(NSCoder *)aCoder{
    [aCoder encodeObject:对象属性 forKey:@"归档的key"];
}
[objc] view plain copy print?
- (id)initWithCoder:(NSCoder *)aDecoder{
    self = [super init];
    if (self) {
        实例变量 = [aDecoder decodeObjectForKey:@"归档的key"];
    }
    return self;
}  

用法扯皮

／／先把数据在model中归解档

。h

@property(nonatomic,copy)NSString *email;
@property(nonatomic,copy)NSString *uid;
@property(nonatomic,copy)NSString *mobile;

*is_sec_pwd;

。m

#import "UserModel.h"
static UserModel *model;
@implementation UserModel
+(UserModel *)defaultCellModel{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        if (!model) {
            model = [[UserModel alloc]init];
        }
    });
    return model;
}
- (void)encodeWithCoder:(NSCoder *)aCoder{
    [aCoder encodeObject:self.account forKey:@"account"];
    [aCoder encodeObject:self.regmobile forKey:@"regmobile"];
    [aCoder encodeObject:self.sec1_question forKey:@"sec1_question"];

}

- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder{
    self = [super init];

    if(self)

    {

        self.account = [aDecoder decodeObjectForKey:@"account"];

        self.regmobile = [aDecoder decodeObjectForKey:@"regmobile"];
        self.sec1_question = [aDecoder decodeObjectForKey:@"sec1_question"];
        self.headimage = [aDecoder decodeObjectForKey:@"headimage"];

    }

    return self;

}

@end

NSUserDefaults
 保存
Model数据-》归档-》NSUserdefaults 
NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults];
//不能直接存取NSObject，需要先归档转成NSData
NSData  *data  = [NSKeyedArchiver archivedDataWithRootObject:model];             
 [defaults setObject:data forKey:@"model"];
NSUserdefaults-》解档-》Model数据
NSData *modeldata = [[NSUserDefaults standardUserDefaults]objectForKey:@"model"];
 usermodel = [NSKeyedUnarchiver unarchiveObjectWithData:modeldata];
 
 
 
／／文件中保存
#import "ViewController.h"
#import "linePesist.h"
//导入数据模型类
#define CodeString  @"CodeString"
@implementation ViewController
-(NSString *)dataFile{
NSArray *ar = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString *fielpath = [ar objectAtIndex:0];
return [fielpath stringByAppendingPathComponent:@"data.archive"];
//改修后缀名，以免与属性列表创建的文件重复，而加载成旧的的文件。 不用查字典了。。archive表归档
}
- (void)viewDidLoad {
[super viewDidLoad];
NSString *filepath = [self dataFile];
NSLog(@"%@",filepath);
if([[NSFileManager defaultManager]fileExistsAtPath:filepath]) {
//创建2个实例
NSData *data = [[NSData alloc]initWithContentsOfFile:filepath]; NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc]initForReadingWithData:data];
//把已归档的对象读取。赋值给linepesist
linePesist *linepesist =[unarchiver decodeObjectForKey:CodeString]; [unarchiver finishDecoding];
//完成解档
for(int i = 0;i