09、CoreData版的聯(lián)系人列表

咱們的這個(gè)聯(lián)系人列表可以對(duì)通訊錄中的人進(jìn)行添加聯(lián)系人操作，并且可以點(diǎn)擊某個(gè)聯(lián)系人，進(jìn)入詳情界面，對(duì)聯(lián)系人的個(gè)人信息進(jìn)行修改并保存，實(shí)現(xiàn)一個(gè)簡(jiǎn)單的聯(lián)系人列表就可以啦?。?！
第一步、建一個(gè)工程并增加如下的幾個(gè)類，

屏幕快照 2017-01-20 上午10.21.52.png

1、先創(chuàng)建一個(gè)實(shí)體類，并增加如下屬性，起名為Contacts

屏幕快照 2017-01-20 上午10.28.24.png

2、在我們的主界面ViewController界面創(chuàng)建一個(gè)tableView

#import "ViewController.h"
#import "AddViewController.h"
#import "CoreDataHandle.h"
#import "NSString+ChineseToLatin.h"
#import "Contacts.h"
#import "CustomCell.h"
#import "PersonalViewController.h"
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>
@property (weak, nonatomic) IBOutlet UITableView *tabView;
@property(nonatomic,strong)NSMutableDictionary* allSectionMDic;//所有的分區(qū)，該字典的key為分區(qū)標(biāo)題，該字典的值為可變數(shù)組，可變數(shù)組的元素為聯(lián)系人對(duì)象


//@property (weak, nonatomic) IBOutlet UILabel *nameLabel;
//
//@property (weak, nonatomic) IBOutlet UILabel *phoneLabel;
//@property (weak, nonatomic) IBOutlet UIImageView *headImg;

@end

@implementation ViewController

-(NSMutableDictionary*)allSectionMDic{
    if (!_allSectionMDic) {
        _allSectionMDic=[[NSMutableDictionary alloc] init];
    }
    return _allSectionMDic;
}

#pragma mark-------tableView的代理方法
//返回行數(shù)
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    //獲取字典所有的值，allValuesArray中存儲(chǔ)的是字典所有的值，字典的值為可變數(shù)組
    NSArray* allValuesArray=self.allSectionMDic.allValues;
    //取出其中一個(gè)分區(qū)
    NSArray* sectionArray=[allValuesArray objectAtIndex:section];
    return sectionArray.count;
}
// 返回行高
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 100;
}
//定義單元格
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    CustomCell* cell=[tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    //獲取字典所有的值，allValuesArray中存儲(chǔ)的是字典所有的值，字典的值為可變數(shù)組
    NSArray* allValuesArray=self.allSectionMDic.allValues;
    //取出其中一個(gè)分區(qū)
    NSArray* sectionArray=[allValuesArray objectAtIndex:indexPath.section];
    //取出聯(lián)系人
    Contacts* contacts=sectionArray[indexPath.row];
    cell.headImg.image=[UIImage imageWithData:contacts.headImg];
    cell.nameLabel.text=contacts.name;
    cell.phoneLabel.text=contacts.phone;
    return cell;
}
//返回分區(qū)數(shù)
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return [self.allSectionMDic allKeys].count;
}


//返回分區(qū)標(biāo)題
-(NSString*)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section{
    return [self.allSectionMDic allKeys][section];
    
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.automaticallyAdjustsScrollViewInsets=NO;
    NSArray* array=[[CoreDataHandle sharedCoreDataHandle] queryWithEntityName:@"Contacts" predicate:nil sortByAttribute:nil ascending:YES];
    [self sectionWithContacts:array];
    [self.tabView reloadData];
    
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    
    
    if ([segue.identifier isEqualToString:@"yf"]) {
        //傳值
        CustomCell* cell=(CustomCell*)sender;
        NSIndexPath* path=[self.tabView indexPathForCell:cell];
        NSString* key=[self.allSectionMDic allKeys][path.section];
        NSArray* array=[self.allSectionMDic objectForKey:key];
        Contacts* contacts=array[path.row];
        PersonalViewController* personVC=[segue destinationViewController];
        personVC.block=^{
            //從coreData中獲取所有的聯(lián)系人
            CoreDataHandle* coreData=[CoreDataHandle sharedCoreDataHandle];
            NSArray* allContacts=[coreData queryWithEntityName:@"Contacts" predicate:nil sortByAttribute:nil ascending:YES];
            //將字典中的舊數(shù)據(jù)清空
            if (self.allSectionMDic.count) {
                [self.allSectionMDic removeAllObjects];
            }
            //對(duì)獲取的聯(lián)系人按照首字母進(jìn)行分區(qū)處理
            [self sectionWithContacts:allContacts];
            
            //刷新數(shù)據(jù)
            [self.tabView reloadData];
            
        };
        personVC.contacts=contacts;
     
    }else{
        
        //  在此方法中獲取添加聯(lián)系人的控制器,實(shí)現(xiàn)block
        UINavigationController* naVC=[segue destinationViewController];
        AddViewController* addVC=naVC.childViewControllers.firstObject;
        addVC.block=^{
            //從coreData中獲取所有的聯(lián)系人
            CoreDataHandle* coreData=[CoreDataHandle sharedCoreDataHandle];
            NSArray* allContacts=[coreData queryWithEntityName:@"Contacts" predicate:nil sortByAttribute:nil ascending:YES];
            //將字典中的舊數(shù)據(jù)清空
            if (self.allSectionMDic.count) {
                [self.allSectionMDic removeAllObjects];
            }
            //對(duì)獲取的聯(lián)系人按照首字母進(jìn)行分區(qū)處理
            [self sectionWithContacts:allContacts];
            
            //刷新數(shù)據(jù)
            [self.tabView reloadData];
       
        };

    }
    
}

//將聯(lián)系人動(dòng)態(tài)分區(qū)的方法
-(void)sectionWithContacts:(NSArray*)allContacts{
    //保證有聯(lián)系人
    if (allContacts && allContacts.count) {
        //遍歷數(shù)組，對(duì)每個(gè)聯(lián)系人進(jìn)行分區(qū)
        for (Contacts* contacts in allContacts) {
            //得到聯(lián)系人姓名的首字母，根據(jù)首字母進(jìn)行下一步操作
            NSString* firstWords=[NSString chineseTransformLettersWihthSourceString:contacts.name];
            //一共有兩種情況
            //第一種是有分區(qū),直接添加；第二種是沒有分區(qū)，先創(chuàng)建分區(qū)再添加。分區(qū)就是大字典中的可變數(shù)組
            NSMutableArray* sectionArray=self.allSectionMDic[firstWords];
            if (sectionArray) {
                // 說明分區(qū)存在
                [sectionArray addObject:contacts];
            }else{
                 // 說明分區(qū)不存在
                sectionArray=[[NSMutableArray alloc] init];
                [sectionArray addObject:contacts];
                [self.allSectionMDic setObject:sectionArray forKey:firstWords];
                
            }
            
        }
    }
   
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

3、建一個(gè)自定義的cell，繼承UITableViewCell
Custom.h中

@property (weak, nonatomic) IBOutlet UIImageView *headImg;
@property (weak, nonatomic) IBOutlet UILabel *nameLabel;
@property (weak, nonatomic) IBOutlet UILabel *phoneLabel;

Custom.m中

@implementation CustomCell

- (void)awakeFromNib {
    self.headImg.layer.masksToBounds=YES;
    self.headImg.layer.cornerRadius=40.0;

}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

@end

4、創(chuàng)建一個(gè)添加聯(lián)系人界面，起名為AddViewController，在這里進(jìn)行聯(lián)系人的添加操作

#import "AddViewController.h"
#import "CoreDataHandle.h"
@interface AddViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
- (IBAction)returnBtn:(UIBarButtonItem *)sender;
@property (weak, nonatomic) IBOutlet UIImageView *headImg;

@property (weak, nonatomic) IBOutlet UITextField *nameTF;
@property (weak, nonatomic) IBOutlet UITextField *sexTF;
@property (weak, nonatomic) IBOutlet UITextField *ageTF;
@property (weak, nonatomic) IBOutlet UITextField *phoneTF;
- (IBAction)finishBtn:(UIBarButtonItem *)sender;

- (IBAction)selecePhotoAction:(UITapGestureRecognizer *)sender;

@end

@implementation AddViewController


- (IBAction)returnBtn:(UIBarButtonItem *)sender {
    [self dismissViewControllerAnimated:YES completion:nil];
}

//完成按鈕的點(diǎn)擊方法
- (IBAction)finishBtn:(UIBarButtonItem *)sender {
    //當(dāng)內(nèi)容填充完整的時(shí)候要做的操作
    if ([self isNull]) {
        //將數(shù)據(jù)存儲(chǔ)到CoreData中
        CoreDataHandle* coreDataHandle=[CoreDataHandle sharedCoreDataHandle];
        NSDictionary* contactDic=@{@"name":self.nameTF.text,@"age":@(self.ageTF.text.intValue),@"sex":self.sexTF.text,@"phone":self.phoneTF.text,@"headImg": UIImageJPEGRepresentation((self.headImg.image), 1.0)};
       
       BOOL isSuccess= [coreDataHandle addDataWithEntityName:@"Contacts" values:@[contactDic]];
        if (isSuccess) {
            //返回上級(jí)界面
            [self.navigationController dismissViewControllerAnimated:YES completion:nil];
           //通知上級(jí)界面刷新界面  block或者協(xié)議代理
            if (self.block) {
                self.block();
            }
  
        }else{
            NSLog(@"保存數(shù)據(jù)失敗");
        }
    }
}
//選擇照片換頭像的方法
- (IBAction)selecePhotoAction:(UITapGestureRecognizer *)sender {
    UIImagePickerController* pc=[[UIImagePickerController alloc] init];
    pc.allowsEditing=YES;
    pc.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
    pc.delegate=self;
    [self presentViewController:pc animated:YES completion:nil];
}
//照片選擇器的代理方法
//點(diǎn)擊取消按鈕會(huì)執(zhí)行的代理方法
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [picker dismissViewControllerAnimated:YES completion:nil];
}
//當(dāng)我們選擇好照片，點(diǎn)擊確定按鈕會(huì)執(zhí)行的代理方法
//info:存儲(chǔ)著我們的多媒體資源
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    //獲取圖片資源
    UIImage* img=nil;
    if (picker.allowsEditing) {
        // 說明允許編輯圖片
        img=[info objectForKey:UIImagePickerControllerEditedImage];
    }else{
        //說明圖片不允許被編輯
        img=[info objectForKey:UIImagePickerControllerOriginalImage];
    }
    //將圖片顯示在imgView上
    self.headImg.image=img;
    //退出相冊(cè)
    [picker dismissViewControllerAnimated:YES completion:nil];
}

//判斷輸入框是否有內(nèi)容
-(BOOL)isNull{
    BOOL result=YES;
    NSString* msg=@"";
    if (self.nameTF.text.length==0) {
        result=NO;
        msg=@"請(qǐng)輸入姓名";
    }else if (self.sexTF.text.length==0){
        result=NO;
        msg=@"請(qǐng)輸入性別";
    }else if (self.phoneTF.text.length==0){
        result=NO;
        msg=@"請(qǐng)輸入手機(jī)號(hào)";
    }else if (self.ageTF.text.length==0){
        result=NO;
        msg=@"請(qǐng)輸入年齡";
    }
    if (result) {
        return result;
    }
    [self alertWithMsg:msg];
    return result;
    
}

//警示框
-(void)alertWithMsg:(NSString*)msg{
    
    UIAlertController* alertController=[UIAlertController alertControllerWithTitle:@"友情提示" message:msg preferredStyle:(UIAlertControllerStyleAlert)];
    UIAlertAction* action=[UIAlertAction actionWithTitle:@"確定" style:(UIAlertActionStyleCancel) handler:^(UIAlertAction * _Nonnull action) {
       
    }];
    [alertController addAction:action];
    [self presentViewController:alertController animated:YES completion:nil];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.headImg.layer.masksToBounds=YES;
    self.headImg.layer.cornerRadius=50.0;
  
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    
}



@end

5、在創(chuàng)建一個(gè)個(gè)人界面，起名為PersonalViewController，用來保存?zhèn)€人信息

#import "PersonalViewController.h"
#import "AppDelegate.h"
@interface PersonalViewController ()



- (IBAction)editAction:(UIBarButtonItem *)sender;

@end

@implementation PersonalViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.headImg.layer.masksToBounds=YES;
    self.headImg.layer.cornerRadius=50.0;
    self.nameTF.text=self.contacts.name;
    self.ageTF.text=[NSString stringWithFormat:@"%@",self.contacts.age];
    self.phoneTF.text=self.contacts.phone;
    self.sexTF.text=self.contacts.sex;
    self.headImg.image=[UIImage imageWithData:self.contacts.headImg];
    self.view.userInteractionEnabled=NO;
   
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}



- (IBAction)editAction:(UIBarButtonItem *)sender {
    
    self.view.userInteractionEnabled=!self.view.userInteractionEnabled;
    sender.title=self.view.userInteractionEnabled?@"完成":@"編輯";
    //當(dāng)編輯狀態(tài)為NO的時(shí)候，說明點(diǎn)擊了完成按鈕，我們就對(duì)數(shù)據(jù)進(jìn)行更改
    if (!self.view.userInteractionEnabled) {
        self.contacts.headImg=UIImageJPEGRepresentation(self.headImg.image, 1.0);
        self.contacts.name=self.nameTF.text;
        self.contacts.age=@(self.ageTF.text.intValue);
        self.contacts.sex=self.sexTF.text;
        self.contacts.phone=self.phoneTF.text;
        //同步操作
        AppDelegate* appdelegate=[UIApplication sharedApplication].delegate;
        [appdelegate saveContext];
        if (self.block) {
            self.block();
            //返回上級(jí)界面,上級(jí)界面刷新數(shù)據(jù)
            [self.navigationController popViewControllerAnimated:YES];
        }
       
    }
}
@end

6、在這里我對(duì)CoreData進(jìn)行了封裝，直接用的,這些方法需要在.h中進(jìn)行聲明

#import "CoreDataHandle.h"


@interface CoreDataHandle ()

@property(nonatomic,retain)AppDelegate* appDelegate;
@property(nonatomic,retain)NSManagedObjectContext* context;

@end

@implementation CoreDataHandle
+(CoreDataHandle*)sharedCoreDataHandle{
    static CoreDataHandle* coreDataHandle=nil;
    if (coreDataHandle==nil) {
        coreDataHandle=[[CoreDataHandle alloc] init];
    }
    return coreDataHandle;
    
}

//重寫屬性的getter方法
-(AppDelegate*)appDelegate{
    
    return (AppDelegate*)[UIApplication sharedApplication].delegate;
}

-(NSManagedObjectContext*)context{
    return self.appDelegate.managedObjectContext;
}

//增加
-(BOOL)addDataWithEntityName:(NSString*)entityName values:(NSArray<NSDictionary*>*)valuesArray{
    //將字符串轉(zhuǎn)換為類名
//    Class objectClass=NSClassFromString(entityName);
    //創(chuàng)建要插入的被管理者對(duì)象
    //因?yàn)楫?dāng)前是一個(gè)公用的coreData處理，所以此處的類型不能寫死，用到了多態(tài)，父類指針指向子類對(duì)象
    for (NSDictionary* valueDic in valuesArray) {
        NSManagedObject* addData=[NSEntityDescription insertNewObjectForEntityForName:entityName inManagedObjectContext:self.context];
        //當(dāng)我們父類指針指向子類對(duì)象的時(shí)候，就不能直接調(diào)用子類的屬性為它賦值，這時(shí)候就需要用到KVC
        [addData setValuesForKeysWithDictionary:valueDic];

    }
       //同步操作
    BOOL isSuccess=[[self context] save:nil];
    if (isSuccess) {
        return YES;
        
    }else{
        NSLog(@"同步失敗");
        return NO;
    }
    
}

//查詢  帶條件查詢
//第一個(gè)參數(shù)：要查詢的實(shí)體名
//第二個(gè)參數(shù)：查詢條件  若為nil則查詢?nèi)?//第三個(gè)參數(shù)：按照哪個(gè)屬性排序  若為nil則不排序
//第四個(gè)參數(shù)：如果排序  YES：升序  NO：降序
-(NSArray*)queryWithEntityName:(NSString*)entityName
                     predicate:(NSString*)predicate
                     sortByAttribute:(NSString*)attributeName
                     ascending:(BOOL)ascending{
    //創(chuàng)建要查詢的實(shí)體對(duì)象
    NSFetchRequest* req=[[NSFetchRequest alloc] initWithEntityName:entityName];
    //查詢條件
    if (predicate) {
        NSPredicate* myPredicate=[NSPredicate predicateWithFormat:predicate];
        req.predicate=myPredicate;
    }
    //排序
    if (attributeName) {
        NSSortDescriptor* sort=[NSSortDescriptor sortDescriptorWithKey:attributeName ascending:ascending];
        req.sortDescriptors=@[sort];
    }
    //上下文執(zhí)行查詢操作
    NSArray* resultArray=[self.context executeFetchRequest:req error:nil];
    return resultArray;
    
}

//修改數(shù)據(jù)
//第一個(gè)參數(shù)：要更改的實(shí)體名稱
//第二個(gè)參數(shù)：要被更改的被管理者的范圍
//第三個(gè)參數(shù)：最終要被改成的值
-(BOOL)updataWithEntityName:(NSString*)entityName range:(NSString*)rangeString result:(NSDictionary*)resultDic{
    NSArray* resultArray=[self queryWithEntityName:entityName predicate:rangeString sortByAttribute:nil ascending:YES];
    //遍歷上面數(shù)組，將負(fù)責(zé)條件的所有對(duì)象都進(jìn)行更新
    for (NSManagedObject* object in resultArray) {
        //遍歷字典，將對(duì)象中所需要更改的屬性值都進(jìn)行更新
        for (NSString* key in resultDic) {
            [object setValue:resultDic[key] forKey:key];
        }
    }
    //同步操作
   BOOL isSuccess= [[self context] save:nil];
    if (isSuccess) {
        return YES;
    }
    
    NSLog(@"更新失敗");
    return NO;
    
}

//刪除
-(BOOL)removeObjectWithManageObjects:(NSArray<NSManagedObject*>*)manageObjects{
    for (NSManagedObject* item in manageObjects) {
        [self.context deleteObject:item];
    }
    
    //同步操作
    BOOL isSuccess= [[self context] save:nil];
    if (isSuccess) {
        return YES;
    }
    
    NSLog(@"更新失敗");
    return NO;

}



@end

7、這是一個(gè)將漢字轉(zhuǎn)拼音的方法

#import "NSString+ChineseToLatin.h"

@implementation NSString (ChineseToLatin)
//漢字轉(zhuǎn)拼音
+(NSString*)chineseTransformLettersWihthSourceString:(NSString*)sourceString{
    //將字符串中的空格替換掉
    [sourceString stringByReplacingOccurrencesOfString:@" " withString:@""];
    //    sourceString = nil;空對(duì)象
    //    sourceString = @"";對(duì)象的值為空字符串
    //說明字符串對(duì)象不為空
    if (sourceString && sourceString.length !=0) {
        NSMutableString* str = [NSMutableString stringWithString:sourceString];
        //將漢字轉(zhuǎn)為字母
        //第一個(gè)參數(shù):要轉(zhuǎn)換的源字符串
        //第二個(gè)參數(shù):要轉(zhuǎn)換的范圍 如果需要全部轉(zhuǎn)換，此處填寫NULL即可
        //第三個(gè)參數(shù):轉(zhuǎn)換的類型
        //第四個(gè)參數(shù):  YES就是還是得到源字符串 NO得到的是轉(zhuǎn)換好之后的。
        //帶聲調(diào)的拼
        //__bridge: 當(dāng)轉(zhuǎn)換類型的時(shí)候框架體系發(fā)生的改變，不讓內(nèi)存管理方式改變。那么久需要它來修飾類型
        CFStringTransform((__bridge CFMutableStringRef)str, NULL, kCFStringTransformToLatin, NO);
        NSLog(@"帶聲調(diào)的----%@",str);
        //去掉聲調(diào)
        CFStringTransform((__bridge CFMutableStringRef)str, NULL, kCFStringTransformStripCombiningMarks, NO);
        NSLog(@"不帶聲調(diào)的----%@",str);
        //將拼音大寫，截取首字母
        NSString* upString =  [str uppercaseString];
        upString = [upString substringToIndex:1];
        //
        NSLog(@"大寫的首字母----%@",upString);
        return upString;
    }
    //當(dāng)字符串不存在返回#
    return @"#";
}
@end

這樣簡(jiǎn)單的通訊錄就完成了運(yùn)行如下

![ ![屏幕快照 2017-01-20 上午10.39.21.png](http://upload-images.jianshu.io/upload_images/2758407-a5bbbac67c52783e.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)](http://upload-images.jianshu.io/upload_images/2758407-2d7860e19f073c5f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
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