addressBookHelper

/** *  Model类:存储数据的类叫做Model类.(AddressPerson,PhotoInfo)    Model层的类:只要和数据有关的类都是Model层的类.(比如:数据存储的类,数据处理的类,数据请求类,数据解析类). *//** *  MVC:M层的任务是为了分担Controller数据处理的功能,让C只处理M与V之间的通讯,不做数据处理.而AddressBookHelper就是帮助AddressBookListController瘦身的,分担数据数据的模块.    而对于该助手类来说,对于数据处理,只需要一个助手就可以了,所以该类采用单例设计模式. */@interface FYZAddressBookHelper : NSObject+ (FYZAddressBookHelper *)sharedAddressBookHelper;//返回分区的个数+ (NSInteger)numberOfSections;//返回指定分区的行数+ (NSInteger)numberOfRowsInSection:(NSInteger)section;//返回对应的AddressPerson对象+ (AddressPerson *)addressPersonAtIndexPath:(NSIndexPath *)indexPath;//返回每个分区的title+ (NSString *)titleForHeaderInSection:(NSInteger )section;//返回索引值+ (NSArray *)sectionIndexTitles;//是否删除整个分区+ (BOOL)isNeedDeleteSection:(NSInteger)section;//删除整个分区+ (void)deleteOneSection:(NSInteger)section;//删除一行+ (void)deleteRowAtIndexPath:(NSIndexPath *)indexPath;//移动数据+ (void)moveAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath;//添加数据+ (void)addAddresPerson:(AddressPerson *)person;//保存数据+ (void)saveData;@end<p style="margin-top: 0px; margin-bottom: 0px; font-size: 24px; font-family: Menlo; color: rgb(201, 27, 19);"><pre name="code" class="objc"><pre name="code" class="objc"><pre name="code" class="objc">#import "FYZAddressBookHelper.h"#import "NSString+Addition.h"#define kFileName @"person.plist"@interface FYZAddressBookHelper ()@property (nonatomic, retain) NSMutableDictionary *addressBookDic; //存储联系人信息@property (nonatomic, retain) NSMutableArray *orderedKeys;//存储排好序的key@end@implementation FYZAddressBookHelper//把该静态变量定义在方法之外,在整个.m文件中都可以访问.static FYZAddressBookHelper *helper = nil;+ (FYZAddressBookHelper *)sharedAddressBookHelper{    //加一个同步锁,保证同一时刻只有一个线程访问.    @synchronized(self) {        if (!helper) {            helper = [[FYZAddressBookHelper alloc] init];                        //判断之前在Documents文件夹下是否存储过数据，            //(1)先获取person.plist文件路径            NSString *filePath = [self getFilePath];            //(2)判断该路径是否存在。（路径是否正确）            NSFileManager *manager = [NSFileManager defaultManager];            BOOL isExist = [manager fileExistsAtPath:filePath];            if (isExist) {                //如果存储过数据，则在Documents文件夹下读取，                [helper readDataFromDocuments];            } else {                //如果没有，则在包中的plist文件读取.                [helper readDataFromPlist];            }        }    }    return helper;}//从documents文件夹下的person.plist文件中读取//反归档- (void)readDataFromDocuments{    //根基文件路径初始化一个NSMutableData对象    NSMutableData *data = [NSMutableData dataWithContentsOfFile:[[self class] getFilePath]];    //创建反归档对象    NSKeyedUnarchiver *unArchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];    //反归档    self.addressBookDic = [unArchiver decodeObjectForKey:@"person"];    //结束反归档    [unArchiver finishDecoding];    RELEASE_SAFE(unArchiver);    //获取排好序的key值    NSArray *sortedKeys = [[self.addressBookDic allKeys] sortedArrayUsingSelector:@selector(compare:)];    //将不可变的数组转化为可变数组    self.orderedKeys = [NSMutableArray arrayWithArray:sortedKeys];}//从本地文件读取数据- (void)readDataFromPlist{    //1.先获取文件路径    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"AddressBook" ofType:@"plist"];    //2.根据文件路径初始化字典对象    NSDictionary *dic = [NSDictionary dictionaryWithContentsOfFile:filePath];    //3.创建可变字典存储联系人数据    self.addressBookDic = [NSMutableDictionary dictionaryWithDictionary:dic];    //4.将字典封装成AddressPerson对象    //(1)遍历字典得到key    for (NSString *key in dic) {        //(2)根据key获取对应的数组        NSArray *group = dic[key];        //(3)创建可变数组,存储AddressPerson对象        NSMutableArray *newGroup = [NSMutableArray array];        //(4)遍历数组,得到字典,将字典封装成AddressPerson对象        for (NSDictionary *tempDic in group) {            AddressPerson *person = [[AddressPerson alloc] initWithDic:tempDic];            [newGroup addObject:person];            RELEASE_SAFE(person);        }        //(5)替换掉字典中key对应的存储字典的不可变数组.(使用存储对象的可变数组)        [self.addressBookDic setObject:newGroup forKey:key];    }    //5.获取字典中所有的key,并且升序排序    NSArray *sortedKeys = [[self.addressBookDic allKeys] sortedArrayUsingSelector:@selector(compare:)];    //6.将不可变数组转换成可变数组    self.orderedKeys = [NSMutableArray arrayWithArray:sortedKeys];}+ (NSInteger)numberOfSections{    return [self sharedAddressBookHelper].orderedKeys.count;}+ (NSInteger)numberOfRowsInSection:(NSInteger)section{    //1.先获取key//    NSString *key = helper.orderedKeys[section];//    //2.根据key获取对应的小数组//    NSMutableArray *group = helper.addressBookDic[key];//    //3.求出小数组元素个数//    return [group count];    return [helper.addressBookDic[helper.orderedKeys[section]] count];}+ (AddressPerson *)addressPersonAtIndexPath:(NSIndexPath *)indexPath{    //1.先获取key    //2.获取key 对应的小数组    //3.从小数组中获取对应的对象    return helper.addressBookDic[helper.orderedKeys[indexPath.section]][indexPath.row];}+ (NSString *)titleForHeaderInSection:(NSInteger )section{    return helper.orderedKeys[section];}+ (NSArray *)sectionIndexTitles{    return helper.orderedKeys;}//是否删除整个分区+ (BOOL)isNeedDeleteSection:(NSInteger)section{    //当对应的数组中只有一个元素时,需要删除整个分区.    NSMutableArray *group = helper.addressBookDic[helper.orderedKeys[section]];    return group.count == 1 ? YES : NO;}//删除整个分区+ (void)deleteOneSection:(NSInteger)section{    //(1)从字典中移除对应的分组    NSString *key = helper.orderedKeys[section];    [helper.addressBookDic removeObjectForKey:key];    //(2)从排好序的key中移除分组对应的key    [helper.orderedKeys removeObjectAtIndex:section];}//删除一行+ (void)deleteRowAtIndexPath:(NSIndexPath *)indexPath{    //(1)先获取key    NSString *key = helper.orderedKeys[indexPath.section];    //(2)获取数组    NSMutableArray *group = helper.addressBookDic[key];    //(3)移除元素    [group removeObjectAtIndex:indexPath.row];}//移动+ (void)moveAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath{    //(1)将原来数据删除掉    NSString *key = helper.orderedKeys[sourceIndexPath.section];    NSMutableArray *group = helper.addressBookDic[key];        //在删除之前先retain    AddressPerson *person = [[group objectAtIndex:sourceIndexPath.row] retain];        [group removeObjectAtIndex:sourceIndexPath.row];    //(2)插入新的数据    [group insertObject:person atIndex:destinationIndexPath.row];    RELEASE_SAFE(person);}//@"范玉贞" fanyuzhen //F+ (void)addAddresPerson:(AddressPerson *)person{    //获取拼音第一个字符,@"F"    NSString *first = [person.name firstCharactor];    //(1)根据key从字典中取对应的分组    NSMutableArray *group = helper.addressBookDic[first];//@"F"    if (!group) {        //如果字典中没有该元素        group = [NSMutableArray array];        //将对应key与分组存入字典中        [helper.addressBookDic setObject:group forKey:first];                //添加联系人        //重新读取orderedKeys        //5.获取字典中所有的key,并且升序排序        NSArray *sortedKeys = [[helper.addressBookDic allKeys] sortedArrayUsingSelector:@selector(compare:)];        //6.将不可变数组转换成可变数组        helper.orderedKeys = [NSMutableArray arrayWithArray:sortedKeys];    }    [group addObject:person];}//归档+ (void)saveData{    //1.获取存储的内容    //helper.addressBookDic;    //2.获取存储的文件路径    NSString *filePath = [self getFilePath];    NSMutableData *data = [NSMutableData data];    //创建归档对象    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];    //归档    [archiver encodeObject:helper.addressBookDic forKey:@"person"];    //结束归档    [archiver finishEncoding];    //写入文件    [data writeToFile:filePath atomically:YES];    RELEASE_SAFE(archiver);}+ (NSString *)getFilePath{    //(1)获取documents文件路径    NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];    //(2)获取存储的文件路径(拼接)    NSString *filePath = [documentsPath stringByAppendingPathComponent:kFileName];    return filePath;}- (void)dealloc{    RELEASE_SAFE(_addressBookDic);    RELEASE_SAFE(_orderedKeys);    [super dealloc];}@end