iOS之文件管理(五)—NSKeyedArchive 文件归档

一，前言

使用情景：
　　在我们的实际开发过程中，为了更好的用户体验，可能需要在APP上存储用户的某些信息，比如淘宝APP会记录用户曾经填写过的收货地址。这种数据不方便用前面提到的NSUserDefaults来存储：
　　   一是，因为地址数据是一个模型，NSUserDefaults只能用于NSString、NSArray、NSDictionary等常用的数据类型；
　　   二是，用户还会经常对它进行增删改等操作，NSUserDefaults无法满足。

此时，用NSKeyedArchive归档的形式来存储地址模型数据最符合要求。

二，使用方法

（1）创建地址模型CLVoiceApplyAddressModel

CLVoiceApplyAddressModel.h文件

#import <Foundation/Foundation.h>

@interface CLVoiceApplyAddressModel : NSObject<NSCoding>
//用于存储多个地址时，标记用户选中的状态
@property (nonatomic, copy) NSString *state;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSString *phoneNum;
@property (nonatomic ,copy) NSString *mainAddress;
@property (nonatomic ,copy) NSString *detailAddress;

+(instancetype)AddressModelWithDict:(NSDictionary *)dict;
-(instancetype)initAddressModelWithDict:(NSDictionary *)dict;
@end

 

CLVoiceApplyAddressModel.m文件

  #import "CLVoiceApplyAddressModel.h"

  @implementation CLVoiceApplyAddressModel

-(void)encodeWithCoder:(NSCoder *)aCoder{
    [aCoder encodeObject:_state forKey:@"state"];
    [aCoder encodeObject:_name forKey:@"name"];
    [aCoder encodeObject:_phoneNum forKey:@"phoneNum"];
    [aCoder encodeObject:_mainAddress forKey:@"mainAddress"];
    [aCoder encodeObject:_detailAddress forKey:@"detailAddress"];
}
-(instancetype)initWithCoder:(NSCoder *)aDecoder{
　　 self = [super init];
　　if (self) {
  　　  self.state= [aDecoder decodeObjectForKey:@"state"];
    　　self.name = [aDecoder decodeObjectForKey:@"name"];
    　　self.phoneNum = [aDecoder decodeObjectForKey:@"phoneNum"];
    　　self.mainAddress = [aDecoder decodeObjectForKey:@"mainAddress"];
    　　self.detailAddress = [aDecoder decodeObjectForKey:@"detailAddress"];
　　}else{
   　　 return nil;
　　}
　　return self;
}
+(instancetype)AddressModelWithDict:(NSDictionary *)dict{
　　return [[self alloc] initAddressModelWithDict:dict];
}

-(instancetype)initAddressModelWithDict:(NSDictionary *)dict{
　　if (self = [super init]) {
   　　 self.state =[dict objectForKey:@"state"];
    　　self.name =[dict objectForKey:@"name"];
    　　self.phoneNum =[dict objectForKey:@"phoneNum"];
    　　self.mainAddress =[dict objectForKey:@"mainAddress"];
    　　self.detailAddress =[dict objectForKey:@"detailAddress"];
}
　　return self;
}
@end

 

为了实现对归档地址的操作，我们专门创建了一个工具类：CLInvoiceApplyAddressModelTool。

#import <Foundation/Foundation.h>
@class CLVoiceApplyAddressModel;

@interface CLInvoiceApplyAddressModelTool : NSObject

+(NSArray *)allAddressInfo;
+(CLVoiceApplyAddressModel *)currentSelectedAddress;
+(void)update;
+(void)updateAddressInfoAfterDeleted;

+(void)setSelectedAddressByNewInfoArray:(NSArray *)infoArray;
+(void)addInfo:(CLVoiceApplyAddressModel *)info;
+(void)removeInfoAtIndex:(NSUInteger)index;
＋(void)updateInfoAtIndex:(NSUInteger)index withInfo:(CLVoiceApplyAddressModel *)info;
+(void)removeAllInfo;
@end

 

#import "CLInvoiceApplyAddressModelTool.h"
#import "CLVoiceApplyAddressModel.h"
#define AddressInfosPath  [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"addressInfo1.data"]

@implementation CLInvoiceApplyAddressModelTool

static NSMutableArray *_addressInfos;
+(NSArray *)allAddressInfo{
    _addressInfos = [NSKeyedUnarchiver unarchiveObjectWithFile:AddressInfosPath];
    if (!_addressInfos) _addressInfos = [NSMutableArray array];
    return _addressInfos;
}

+(CLVoiceApplyAddressModel *)currentSelectedAddress{
    CLVoiceApplyAddressModel *currentAddress;
　　BOOL hasSelectedAddress = NO;
　　if ([self allAddressInfo].count) {
   　　 for (CLVoiceApplyAddressModel *info in _addressInfos) {
      　　  if ([info.state isEqualToString:@"1"]) {
         　　   currentAddress = info;
            　　hasSelectedAddress = YES;
            　　break;
       　　 };
   　　 }
　　}else if([self allAddressInfo].count == 0 || hasSelectedAddress){
   　　 currentAddress = nil;
　　}
　　　　return currentAddress;
　　}

+(void)update{
　　[NSKeyedArchiver archiveRootObject:_addressInfos toFile:AddressInfosPath];
}
+(void)updateAddressInfoAfterDeleted{
　　if (_addressInfos.count) {
   　　 if (![self currentSelectedAddress]) {
      　　  CLVoiceApplyAddressModel *info = [CLInvoiceApplyAddressModelTool allAddressInfo][0];
        　　info.state = @"1";
        　　[CLInvoiceApplyAddressModelTool updateInfoAtIndex:0 withInfo:info];
   　　 }
　　}
}

+(void)setSelectedAddressByNewInfoArray:(NSArray *)infoArray{
　　[NSKeyedArchiver archiveRootObject:infoArray toFile:AddressInfosPath];
}

+(void)addInfo:(CLVoiceApplyAddressModel *)info{
　if (!_addressInfos.count) {
  　　  _addressInfos = [NSMutableArray array];
　　}
　
　for (CLVoiceApplyAddressModel *oldInfo in _addressInfos ) {
    oldInfo.state = @"0";
　　}
　　[_addressInfos insertObject:info atIndex:0];
　　[self update];
}

+ (void)removeInfoAtIndex:(NSUInteger)index {
　　[_addressInfos removeObjectAtIndex:index];
　　[self update];
}

+ (void)removeAllInfo{
　　[_addressInfos removeAllObjects];
　　[self update];
}

+ (void)updateInfoAtIndex:(NSUInteger)index withInfo:(CLVoiceApplyAddressModel *)info {
　　[_addressInfos replaceObjectAtIndex:index withObject:info];
　　[self update];
}

@end