iOS存储自定义对象模型

创建一个模型（user）

在.h中。遵守NSCoding协议

#import <Foundation/Foundation.h>

@interface PDUser : NSObject<NSCoding>

@property(nonatomic,strong)NSString *apiKey;
@property(nonatomic,strong)NSString *apiSecret;
@property(nonatomic,strong)NSString *regDev;

@property(nonatomic,assign)NSInteger user_id;

@end

在.m中。重写方法encodeWithCoder，initWithCoder

#import "PDUser.h"

@implementation PDUser

-(void)encodeWithCoder:(NSCoder *)aCoder{
     
    [aCoder encodeObject:self.apiKey forKey:@"apiKey"];
    [aCoder encodeObject:self.apiSecret forKey:@"apiSecret"];
    [aCoder encodeObject:self.regDev forKey:@"UUID"];
    [aCoder encodeObject:[NSString stringWithFormat:@"%ld",self.user_id] forKey:@"userid"];

}

-(instancetype)initWithCoder:(NSCoder *)aDecoder{
    
    if(self = [super init]){
        
        self.apiKey = [aDecoder decodeObjectForKey:@"apiKey"];
        self.apiSecret = [aDecoder decodeObjectForKey:@"apiSecret"];
        self.regDev = [aDecoder decodeObjectForKey:@"UUID"];
        self.user_id = [[aDecoder decodeObjectForKey:@"userid"] integerValue];
    
    }
    return self;
}

外界使用

保存在NSUserDefaults中，以及从中取出user。

• 保存

    //把user对象存入 
    PDUser *user = [[PDUser alloc] init];
    user.apiSecret = _reBackData.apiSecret;
    user.apiKey = _reBackData.apiKey;
    user.regDev = _reBackData.regDev;
    user.user_id = _reBackData.user_id;
        
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:user];
    [[NSUserDefaults standardUserDefaults] setObject:data forKey:@"USERKEY"];     //保存

• 取出

    //从中取出user对象
    NSUserDefaults *userD = [NSUserDefaults standardUserDefaults];
    NSData *data = [userD objectForKey:@"USERKEY"];
    PDUser *user = [NSKeyedUnarchiver unarchiveObjectWithData:data];
        

清除数据

    [[NSUserDefaults standardUserDefaults] removeObjectForKey:key];
    [[NSUserDefaults standardUserDefaults] synchronize];