iOS 数据储存--归档

Posted 2020-09-19 徐家汇123

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

／／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;
@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

 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