iOS 微博草稿箱代码实现

首先创建一个归档用的工具类BaseKeyedArchiver

.h中代码：

////  BaseKeyedArchiver.h//  DataWriteToFile////  Created by limin on 16/7/18.//  Copyright © 2016年 君安信（北京）科技有限公司. All rights reserved.//#import <Foundation/Foundation.h>@interface BaseKeyedArchiver : NSObject/** *  单例 * *  @return 返回单例对象 */+ (instancetype)sharedClient;/** *  对数据进行归档 * *  @param dataArray 需要进行归档的数据 */-(void)setArchiverDataWithData:(NSMutableArray *)dataArray;/** *  获取解归档的数据 * *  @return 解归档后的数组 */-(NSMutableArray*)getArchiverData;/** *  获取文件路径 * *  @return 返回文件路径 */-(NSString *)getAllFilePath;@end

.m中代码

////  BaseKeyedArchiver.m//  DataWriteToFile////  Created by limin on 16/7/18.//  Copyright © 2016年 君安信（北京）科技有限公司. All rights reserved.//#import "BaseKeyedArchiver.h"/** *  文件后缀名 */NSString *const kFileDefaultPathExtension = @"cache";/** *  默认文件名 */NSString *kFileDefaultFileName = @"defaultFile";@interface BaseKeyedArchiver ()@end@implementation BaseKeyedArchiver/** *  单例 * *  @return 返回单例对象 */+ (instancetype)sharedClient{    static BaseKeyedArchiver *client = nil;    static dispatch_once_t onceToken;    dispatch_once(&onceToken, ^{        client = [[BaseKeyedArchiver alloc]init];    });//    kFileDefaultFileName = [[NSUserDefaults standardUserDefaults]valueForKey:isLoginStatus]?[[NSUserDefaults standardUserDefaults]valueForKey:PHONE]:@"defaultFile";    return client;}/** *  对数据进行归档 * *  @param dataArray 需要进行归档的数据 */-(void)setArchiverDataWithData:(NSMutableArray *)dataArray{    NSString *fileAllPath = [self getAllFilePath];    if([[NSFileManager defaultManager] fileExistsAtPath:fileAllPath]) {//先将该地址存在的文件删除，再存储。        NSError *error    = nil;        if(![[NSFileManager defaultManager] removeItemAtPath:fileAllPath error:&error]) {            NSLog(@"Cannot remove file: %@", error);        }    }    [NSKeyedArchiver archiveRootObject:dataArray toFile:fileAllPath];}/** *  获取解归档的数据 * *  @return 解归档后的数组 */-(NSMutableArray*)getArchiverData{    NSString *fileAllPath = [self getAllFilePath];    NSMutableArray *newDataArray = [NSKeyedUnarchiver unarchiveObjectWithFile:fileAllPath];    return newDataArray;}/** *  获取文件路径 * *  @return 返回文件路径 */-(NSString *)getAllFilePath{    NSString *paths = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];    NSString *fileAllPath = [[paths stringByAppendingPathComponent:kFileDefaultFileName] stringByAppendingPathExtension:kFileDefaultPathExtension];    return fileAllPath;}@end

需要存储的数据，创建一个model对象。并在model.m中加入归档信息

.h代码

////  LMDraftModel.h//  ImageSelectOrArchive////  Created by limin on 16/12/13.//  Copyright © 2016年 君安信（北京）科技有限公司. All rights reserved.//#import <Foundation/Foundation.h>@interface LMDraftModel : NSObject/* 文章标题 */@property(nonatomic,copy)NSString *articleTitle;/* 时间 */@property(nonatomic,copy)NSString *time;/* 图片数组 */@property(nonatomic,strong)NSArray *pictureArrays;/** 图片资源*/@property(nonatomic,strong)NSArray *assetArrays;/* 图片来源 */@property(nonatomic,assign)BOOL OriginalPhoto;@end

.m代码

////  LMDraftModel.m//  ImageSelectOrArchive////  Created by limin on 16/12/13.//  Copyright © 2016年 君安信（北京）科技有限公司. All rights reserved.//#import "LMDraftModel.h"#import <objc/runtime.h>@interface LMDraftModel()<NSCoding>@end@implementation LMDraftModel#pragma mark - 归档-(void)encodeWithCoder:(NSCoder *)aCoder{    unsigned int outCount = 0;    Ivar *ivars = class_copyIvarList([self class], &outCount);    for (unsigned int i = 0; i<outCount; i++) {        Ivar ivar = ivars[i];        NSString *key = [NSString stringWithUTF8String:ivar_getName(ivar)];        id value = [self valueForKey:key];        [aCoder encodeObject:value forKey:key];    }    free(ivars);}#pragma mark - 解归档-(instancetype)initWithCoder:(NSCoder *)aDecoder{    self = [super init];    if (self) {        unsigned int OutCount = 0;        Ivar *ivars = class_copyIvarList([self class], &OutCount);        for (unsigned int i=0; i<OutCount; i++) {            Ivar ivar = ivars[i];            NSString *key = [NSString stringWithUTF8String:ivar_getName(ivar)];            [self setValue:[aDecoder decodeObjectForKey:key] forKey:key];        }        free(ivars);    }    return self;}@end

数据归档方法：

#pragma mark - 保存到草稿箱-(void)saveDraftBox{    //时间    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];    NSString *destDateString = [dateFormatter stringFromDate:[NSDate date]];    //model    LMDraftModel *model = [[LMDraftModel alloc]init];    model.time = destDateString;    model.articleTitle = self.titleTextField.text;    model.pictureArrays = self.selectedPhotos;       //归档数据{A:先取出存储的数据，B:判断数据是否已存在，（1，第一次进去，直接插入数据。2:从草稿箱进去的，直接替换对应的数据）}    NSMutableArray *draftArrays = [[BaseKeyedArchiver sharedClient]getArchiverData];    if (!draftArrays) {        draftArrays = [NSMutableArray array];    }    if (self.isFromDraftBox) {        [draftArrays replaceObjectAtIndex:self.draftIndex withObject:model];    }else    {        [draftArrays insertObject:model atIndex:0];    }    [[BaseKeyedArchiver sharedClient]setArchiverDataWithData:draftArrays];    }

获取归档的数据:

-(void)getUnArchiveData{    //解析文件数据    NSArray *array = [[BaseKeyedArchiver sharedClient]getArchiverData];}