iOS 資料儲存--歸檔

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四種資料持久化方式 http://www.cocoachina.com/ios/20160617/16739.html 

／／先把資料在model中歸解檔

。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

 儲存

Model資料-》歸檔-》NSUserdefaults 

NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults];

//不能直接存取NSObject，需要先歸檔轉成NSData

NSData  *data  = [NSKeyedArchiver archivedDataWithRootObject:model];             

 [defaults setObject:data forKey:@"model"];

NSUserdefaults-》解檔-》Model資料

NSData *modeldata = [[NSUserDefaults standardUserDefaults]objectForKey:@"model"];

 usermodel = [NSKeyedUnarchiver unarchiveObjectWithData:modeldata];

 

 

 

／／檔案中儲存

#import "ViewController.h" #import "linePesist.h" //匯入資料模型類 #define CodeString  @"CodeString" @implementation ViewController -(NSString *)dataFile{ NSArray *ar = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES); NSString *fielpath = [ar objectAtIndex:0]; return  [fielpath stringByAppendingPathComponent:@ "data.archive" ]; //改修尾碼名，以免與屬性列表建立的檔案重複，而載入成舊的的檔案。 不用查字典了。。archive表歸檔 } - (void)viewDidLoad { [ super  viewDidLoad]; NSString *filepath = [self dataFile]; NSLog(@ "%@" ,filepath); if ([[NSFileManager defaultManager]fileExistsAtPath:filepath]) { //建立2個執行個體 NSData *data = [[NSData alloc]initWithContentsOfFile:filepath]; NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc]initForReadingWithData:data]; //把已歸檔的對象讀取。賦值給linepesist linePesist *linepesist =[unarchiver decodeObjectForKey:CodeString]; [unarchiver finishDecoding]; //完成解檔 for (int i = 0;i

iOS 資料儲存--歸檔