09、CoreData版的联系人列表

咱们的这个联系人列表可以对通讯录中的人进行添加联系人操作，并且可以点击某个联系人，进入详情界面，对联系人的个人信息进行修改并保存，实现一个简单的联系人列表就可以啦！！！
第一步、建一个工程并增加如下的几个类，

屏幕快照 2017-01-20 上午10.21.52.png

1、先创建一个实体类，并增加如下属性，起名为Contacts

屏幕快照 2017-01-20 上午10.28.24.png

2、在我们的主界面ViewController界面创建一个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;//所有的分区，该字典的key为分区标题，该字典的值为可变数组，可变数组的元素为联系人对象


//@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
//返回行数
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    //获取字典所有的值，allValuesArray中存储的是字典所有的值，字典的值为可变数组
    NSArray* allValuesArray=self.allSectionMDic.allValues;
    //取出其中一个分区
    NSArray* sectionArray=[allValuesArray objectAtIndex:section];
    return sectionArray.count;
}
// 返回行高
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 100;
}
//定义单元格
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    CustomCell* cell=[tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    //获取字典所有的值，allValuesArray中存储的是字典所有的值，字典的值为可变数组
    NSArray* allValuesArray=self.allSectionMDic.allValues;
    //取出其中一个分区
    NSArray* sectionArray=[allValuesArray objectAtIndex:indexPath.section];
    //取出联系人
    Contacts* contacts=sectionArray[indexPath.row];
    cell.headImg.image=[UIImage imageWithData:contacts.headImg];
    cell.nameLabel.text=contacts.name;
    cell.phoneLabel.text=contacts.phone;
    return cell;
}
//返回分区数
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return [self.allSectionMDic allKeys].count;
}


//返回分区标题
-(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"]) {
        //传值
        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=^{
            //从coreData中获取所有的联系人
            CoreDataHandle* coreData=[CoreDataHandle sharedCoreDataHandle];
            NSArray* allContacts=[coreData queryWithEntityName:@"Contacts" predicate:nil sortByAttribute:nil ascending:YES];
            //将字典中的旧数据清空
            if (self.allSectionMDic.count) {
                [self.allSectionMDic removeAllObjects];
            }
            //对获取的联系人按照首字母进行分区处理
            [self sectionWithContacts:allContacts];
            
            //刷新数据
            [self.tabView reloadData];
            
        };
        personVC.contacts=contacts;
     
    }else{
        
        //  在此方法中获取添加联系人的控制器,实现block
        UINavigationController* naVC=[segue destinationViewController];
        AddViewController* addVC=naVC.childViewControllers.firstObject;
        addVC.block=^{
            //从coreData中获取所有的联系人
            CoreDataHandle* coreData=[CoreDataHandle sharedCoreDataHandle];
            NSArray* allContacts=[coreData queryWithEntityName:@"Contacts" predicate:nil sortByAttribute:nil ascending:YES];
            //将字典中的旧数据清空
            if (self.allSectionMDic.count) {
                [self.allSectionMDic removeAllObjects];
            }
            //对获取的联系人按照首字母进行分区处理
            [self sectionWithContacts:allContacts];
            
            //刷新数据
            [self.tabView reloadData];
       
        };

    }
    
}

//将联系人动态分区的方法
-(void)sectionWithContacts:(NSArray*)allContacts{
    //保证有联系人
    if (allContacts && allContacts.count) {
        //遍历数组，对每个联系人进行分区
        for (Contacts* contacts in allContacts) {
            //得到联系人姓名的首字母，根据首字母进行下一步操作
            NSString* firstWords=[NSString chineseTransformLettersWihthSourceString:contacts.name];
            //一共有两种情况
            //第一种是有分区,直接添加；第二种是没有分区，先创建分区再添加。分区就是大字典中的可变数组
            NSMutableArray* sectionArray=self.allSectionMDic[firstWords];
            if (sectionArray) {
                // 说明分区存在
                [sectionArray addObject:contacts];
            }else{
                 // 说明分区不存在
                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、建一个自定义的cell，继承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、创建一个添加联系人界面，起名为AddViewController，在这里进行联系人的添加操作

#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];
}

//完成按钮的点击方法
- (IBAction)finishBtn:(UIBarButtonItem *)sender {
    //当内容填充完整的时候要做的操作
    if ([self isNull]) {
        //将数据存储到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) {
            //返回上级界面
            [self.navigationController dismissViewControllerAnimated:YES completion:nil];
           //通知上级界面刷新界面  block或者协议代理
            if (self.block) {
                self.block();
            }
  
        }else{
            NSLog(@"保存数据失败");
        }
    }
}
//选择照片换头像的方法
- (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];
}
//照片选择器的代理方法
//点击取消按钮会执行的代理方法
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [picker dismissViewControllerAnimated:YES completion:nil];
}
//当我们选择好照片，点击确定按钮会执行的代理方法
//info:存储着我们的多媒体资源
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    //获取图片资源
    UIImage* img=nil;
    if (picker.allowsEditing) {
        // 说明允许编辑图片
        img=[info objectForKey:UIImagePickerControllerEditedImage];
    }else{
        //说明图片不允许被编辑
        img=[info objectForKey:UIImagePickerControllerOriginalImage];
    }
    //将图片显示在imgView上
    self.headImg.image=img;
    //退出相册
    [picker dismissViewControllerAnimated:YES completion:nil];
}

//判断输入框是否有内容
-(BOOL)isNull{
    BOOL result=YES;
    NSString* msg=@"";
    if (self.nameTF.text.length==0) {
        result=NO;
        msg=@"请输入姓名";
    }else if (self.sexTF.text.length==0){
        result=NO;
        msg=@"请输入性别";
    }else if (self.phoneTF.text.length==0){
        result=NO;
        msg=@"请输入手机号";
    }else if (self.ageTF.text.length==0){
        result=NO;
        msg=@"请输入年龄";
    }
    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:@"确定" 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、在创建一个个人界面，起名为PersonalViewController，用来保存个人信息

#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":@"编辑";
    //当编辑状态为NO的时候，说明点击了完成按钮，我们就对数据进行更改
    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();
            //返回上级界面,上级界面刷新数据
            [self.navigationController popViewControllerAnimated:YES];
        }
       
    }
}
@end

6、在这里我对CoreData进行了封装，直接用的,这些方法需要在.h中进行声明

#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;
    
}

//重写属性的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{
    //将字符串转换为类名
//    Class objectClass=NSClassFromString(entityName);
    //创建要插入的被管理者对象
    //因为当前是一个公用的coreData处理，所以此处的类型不能写死，用到了多态，父类指针指向子类对象
    for (NSDictionary* valueDic in valuesArray) {
        NSManagedObject* addData=[NSEntityDescription insertNewObjectForEntityForName:entityName inManagedObjectContext:self.context];
        //当我们父类指针指向子类对象的时候，就不能直接调用子类的属性为它赋值，这时候就需要用到KVC
        [addData setValuesForKeysWithDictionary:valueDic];

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

//查询  带条件查询
//第一个参数：要查询的实体名
//第二个参数：查询条件  若为nil则查询全表
//第三个参数：按照哪个属性排序  若为nil则不排序
//第四个参数：如果排序  YES：升序  NO：降序
-(NSArray*)queryWithEntityName:(NSString*)entityName
                     predicate:(NSString*)predicate
                     sortByAttribute:(NSString*)attributeName
                     ascending:(BOOL)ascending{
    //创建要查询的实体对象
    NSFetchRequest* req=[[NSFetchRequest alloc] initWithEntityName:entityName];
    //查询条件
    if (predicate) {
        NSPredicate* myPredicate=[NSPredicate predicateWithFormat:predicate];
        req.predicate=myPredicate;
    }
    //排序
    if (attributeName) {
        NSSortDescriptor* sort=[NSSortDescriptor sortDescriptorWithKey:attributeName ascending:ascending];
        req.sortDescriptors=@[sort];
    }
    //上下文执行查询操作
    NSArray* resultArray=[self.context executeFetchRequest:req error:nil];
    return resultArray;
    
}

//修改数据
//第一个参数：要更改的实体名称
//第二个参数：要被更改的被管理者的范围
//第三个参数：最终要被改成的值
-(BOOL)updataWithEntityName:(NSString*)entityName range:(NSString*)rangeString result:(NSDictionary*)resultDic{
    NSArray* resultArray=[self queryWithEntityName:entityName predicate:rangeString sortByAttribute:nil ascending:YES];
    //遍历上面数组，将负责条件的所有对象都进行更新
    for (NSManagedObject* object in resultArray) {
        //遍历字典，将对象中所需要更改的属性值都进行更新
        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(@"更新失败");
    return NO;
    
}

//删除
-(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(@"更新失败");
    return NO;

}



@end

7、这是一个将汉字转拼音的方法

#import "NSString+ChineseToLatin.h"

@implementation NSString (ChineseToLatin)
//汉字转拼音
+(NSString*)chineseTransformLettersWihthSourceString:(NSString*)sourceString{
    //将字符串中的空格替换掉
    [sourceString stringByReplacingOccurrencesOfString:@" " withString:@""];
    //    sourceString = nil;空对象
    //    sourceString = @"";对象的值为空字符串
    //说明字符串对象不为空
    if (sourceString && sourceString.length !=0) {
        NSMutableString* str = [NSMutableString stringWithString:sourceString];
        //将汉字转为字母
        //第一个参数:要转换的源字符串
        //第二个参数:要转换的范围 如果需要全部转换，此处填写NULL即可
        //第三个参数:转换的类型
        //第四个参数:  YES就是还是得到源字符串 NO得到的是转换好之后的。
        //带声调的拼
        //__bridge: 当转换类型的时候框架体系发生的改变，不让内存管理方式改变。那么久需要它来修饰类型
        CFStringTransform((__bridge CFMutableStringRef)str, NULL, kCFStringTransformToLatin, NO);
        NSLog(@"带声调的----%@",str);
        //去掉声调
        CFStringTransform((__bridge CFMutableStringRef)str, NULL, kCFStringTransformStripCombiningMarks, NO);
        NSLog(@"不带声调的----%@",str);
        //将拼音大写，截取首字母
        NSString* upString =  [str uppercaseString];
        upString = [upString substringToIndex:1];
        //
        NSLog(@"大写的首字母----%@",upString);
        return upString;
    }
    //当字符串不存在返回#
    return @"#";
}
@end

这样简单的通讯录就完成了运行如下

](https://img.haomeiwen.com/i2758407/2d7860e19f073c5f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)