IOS Data Storage--Archive

Four methods of data persistence http://www.cocoachina.com/ios/20160617/16739.html

First, the data in the model of the solution file

。 H

@property (nonatomic,copy) nsstring *email; @property (nonatomic,copy) nsstring *uid; @property (nonatomic,copy) NSString *mobile; @property (nonatomic,copy) nsstring *vip; @property (nonatomic,copy) nsstring *regtime; @property ( nonatomic,copy) NSString *is_sec_pwd;

*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"];    [Acoder encodeObject:self.headimage forkey:@ "Headimage"];      [Acoder encodeObject:self.expert_audit forkey:@ "Expert_audit"];        }-(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

Save

Model Data-"archive-" Nsuserdefaults

Nsuserdefaults * defaults = [Nsuserdefaults standarduserdefaults];

cannot access the NSObject directly, it needs to be archived and turned into NSData

NSData *data = [Nskeyedarchiver archiveddatawithrootobject:model];

[Defaults setobject:data forkey:@ "model"];

nsuserdefaults--"Model data "

NSData *modeldata = [[nsuserdefaults standarduserdefaults]objectforkey:@ "model"];

Usermodel = [Nskeyedunarchiver unarchiveobjectwithdata:modeldata];

Save in file

#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

IOS Data Storage--Archive