iOS-联系人应用（一）

环境：xcode6，iphone 4s simulator with iOS8.0

一、功能界面介绍

1.1 应用启动进入联系人列表页面，数据为模拟数据，来源与一个plist文件：

1.2 点击右上角当＋按钮时，进入添加页面，页面跳转采用UINavigationController，该页面上左上角当取消按钮直接导航至起始页面，完成则添加数据至表格：

1.3 当点击一行时，把数据设置至添加页面，用户可编辑（后期可优化为点击一行进入详情页面，再详情页面点击编辑再进入编辑模式）：

二、功能实现

2.1 首先建立一个Empty Application，建立完成后生成文件如下：

1. 再新建一个主view，用于应用加载时显示：选择cocoa touch class，命名为RootViewController，父类为UIViewController，勾选also create xib file。

说明：可选择生产的xib，在右边面板属性的第一个选项取消use auto layout关闭自动调整，再选择第四个选项卡设置size属性配置显示尺寸。

2.往界面中拖入一个tableview，xy设置0，大小设置于屏幕大小一致，打开双屏模式（右上角工具栏第二个），按住ctrl， 选择刚才的tableview拖入

RootViewController.h文件中，使得控制器拥有该tableview以便于控制:

//
//  RootViewController.h
//  ContactsView
//
//  Created by Mike on 14-12-14.
//  Copyright (c) 2014年 Mike. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@property (weak, nonatomic) IBOutlet UITableView *tableView;

@end

类似方法创建一个用于用户添加和编辑的界面 PersonInputViewController

3. 修改AppDelegate.m，设置应用窗口根控制器为 UINavigationController：

//
//  AppDelegate.m
//  ContactsWithInput
//
//  Created by Mike on 14-12-13.
//  Copyright (c) 2014年 Mike. All rights reserved.
//
#import "AppDelegate.h"
#import "RootViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate   

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    RootViewController *rootController = [[RootViewController alloc] init];

    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:rootController]; //设置rootviewcontroller为第一个控制器

    //set navigation style
    navController.navigationBar.backgroundColor = [UIColor grayColor];

    self.window.rootViewController = navController;

    [self.window makeKeyAndVisible];
    return YES;
}

......
@end

4. 修改RootViewController.m，实现tableview数据源protocol和用于编辑的delegate：

实现 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 用于告诉tableview总数据有多少航

实现 - (UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath用户返回每行cell数据

//
//  RootViewController.m
//  ContactsWithInput
//
//  Created by Mike on 14-12-13.
//  Copyright (c) 2014年 Mike. All rights reserved.
//

#import "RootViewController.h"
#import "PersonInputViewController.h"
#import "Person.h"
#import "PersonService.h"

@interface RootViewController () <UITableViewDataSource, UITableViewDelegate, UIAlertViewDelegate>
{
    PersonService *_personService;
}
@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    UINavigationItem *navItem = self.navigationItem;

    //set navigation title
    navItem.title = @"所有联系人";

    _personService = [[PersonService alloc] init];

    //listen add btn
    UIBarButtonItem *addBtn = [[UIBarButtonItem alloc]
                               initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addPerson)];
    navItem.rightBarButtonItem = addBtn;

}

#pragma mark - 添加联系人
- (void)addPerson{
    //goto person input view
    PersonInputViewController *piController = [[PersonInputViewController alloc] init];

    piController.personService = _personService;
    piController.tableView = _tableView;

    [self.navigationController pushViewController:piController animated:YES];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return _personService.persons.count;
}

- (UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *identifier = @"ID";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:identifier];
    }

    Person *p = _personService.persons[indexPath.row];

    cell.textLabel.text = p.name;
    cell.detailTextLabel.text = p.phone;

    return cell;
}

#pragma mark - 点击行进入编辑模式(需要优化为先进入详情页面，再提供按钮编辑)
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    Person *p = [_personService.persons objectAtIndex:indexPath.row];

    //goto person input view
    PersonInputViewController *piController = [[PersonInputViewController alloc] init];

    piController.personService = _personService;
    piController.tableView = _tableView;
    piController.person = p;

    [self.navigationController pushViewController:piController animated:YES];
}

#pragma make - 提交tableview编辑操作
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

    if(editingStyle != UITableViewCellEditingStyleDelete) {
        return;
    }

    int row = indexPath.row;

    Person *p = _personService.persons[row];

    NSString *msg = [NSString stringWithFormat:@"%@%@%@",@"确定要删除 \"", p.name, @"\" 吗?"];

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"删除联系人"
                                                    message:msg delegate:self cancelButtonTitle:@"删除" otherButtonTitles:@"取消", nil];

    alert.tag = row; // 记录所需要删除的行号

    [alert show];
}

#pragma mark - 根据删除提示执行操作
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    //tableview退出编辑模式
    _tableView.editing = NO;

    if(buttonIndex != ) {
        return ;
    }

    int row = alertView.tag;

    //删除源数据
    [_personService.persons removeObjectAtIndex:row];

    NSIndexPath *delIdx = [NSIndexPath indexPathForItem:row inSection:];

    [_tableView deleteRowsAtIndexPaths:@[delIdx] withRowAnimation:UITableViewRowAnimationTop];

}

@end

数据来源由一个PersonService管理，用于加载数据，定义如下：

//
//  PersonService.h
//  ContactsWithEdit
//
//  Created by Mike on 14-12-11.
//  Copyright (c) 2014年 Mike. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface PersonService : NSObject

@property(atomic, strong) NSMutableArray *persons;

@end

//
//  PersonService.m
//  ContactsWithEdit
//
//  Created by Mike on 14-12-11.
//  Copyright (c) 2014年 Mike. All rights reserved.
//

#import "PersonService.h"
#import "Person.h"

@interface PersonService ()
{

}

@end

@implementation PersonService

-(id)init {
    self = [super init];
    if(self) {
        _persons = [NSMutableArray array];
        NSBundle *bundle = [NSBundle mainBundle];
        NSArray *perResource = [NSMutableArray arrayWithContentsOfFile:[bundle pathForResource:@"person" ofType:@"plist"]];

        for(NSDictionary *pDic in perResource) {
            Person *p = [Person personWithName:pDic[@"name"] phone:pDic[@"phone"]];
            [_persons addObject:p];
        }
    }

    return self;
}

@end

2.2 用户添加和编辑界面设计

1. 界面很简单，两个label和两个text input，如下图：

把这两个text input连线到 PersonInputViewController.h，由于添加或者编辑后需要刷新数据源和表格，所以需要personService、tableview和person：

//
//  PersonInputViewController.h
//  ContactsWithInput
//
//  Created by Mike on 14-12-13.
//  Copyright (c) 2014年 Mike. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "PersonService.h"
#import "Person.h"

@interface PersonInputViewController : UIViewController

@property(nonatomic, strong)PersonService *personService;

@property (weak, nonatomic)UITableView *tableView; //refresh tableview after insert

@property(strong, nonatomic)Person *person; //obj for edit

@property (weak, nonatomic) IBOutlet UITextField *nameField; // 名字输入框

@property (weak, nonatomic) IBOutlet UITextField *phoneField; // 号码输入框

@end

PersonInputViewController 初始化时创建两个按钮《取消》和《完成》，并设置监听方法，分别设置在左边和右边。当person不为空的时候，代表进入编辑模式：

//
//  PersonInputViewController.m
//  ContactsWithInput
//
//  Created by Mike on 14-12-13.
//  Copyright (c) 2014年 Mike. All rights reserved.
//

#import "PersonInputViewController.h"

@interface PersonInputViewController ()

@end

@implementation PersonInputViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    //set bar button
    UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc]
                                  initWithTitle:@"取消" style:UIBarButtonItemStylePlain target:self action:@selector(backRootView)];
    UIBarButtonItem *saveBtn = [[UIBarButtonItem alloc]
                                  initWithTitle:@"完成" style:UIBarButtonItemStylePlain target:self action:@selector(savePerson)];

    self.navigationItem.leftBarButtonItem = cancelBtn;
    self.navigationItem.rightBarButtonItem = saveBtn;

    //setter data for edit
    if(_person) {
        _nameField.text = _person.name;
        _phoneField.text = _person.phone;
    }

}

- (void)backRootView {
    [self.navigationController popViewControllerAnimated:YES]; //返回上一个view
}

- (void)savePerson {
    NSString *name = _nameField.text;
    NSString *phone = _phoneField.text;

    //remove white space
    name = [name stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    phone = [phone stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

    if(![name isEqualToString:@""] || ![phone isEqualToString:@""]) {

        if(_person) { //edit
            _person.name = name;
            _person.phone = phone;

            //refresh tableview
            NSIndexPath *editIdx = [NSIndexPath indexPathForRow:[_personService.persons indexOfObject:_person] inSection:];
            [_tableView reloadRowsAtIndexPaths:@[editIdx] withRowAnimation:UITableViewRowAnimationMiddle];

        }else {
            Person *p = [Person personWithName:name phone:phone];

            [_personService.persons addObject:p];

            //refresh tableview
            NSIndexPath *addIdx = [NSIndexPath indexPathForRow:_personService.persons.count- inSection:];
            [_tableView insertRowsAtIndexPaths:@[addIdx] withRowAnimation:UITableViewRowAnimationRight];
        }

    }
    [self backRootView];
}

@end

最后是一个实体类Person的定义：

//
//  Person.h
//  ContactsWithEdit
//
//  Created by Mike on 14-12-10.
//  Copyright (c) 2014年 Mike. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Person : NSObject

+(Person*) personWithName:(NSString *)name phone:(NSString *) phone;

@property(nonatomic, strong) NSString* name;
@property(nonatomic, strong) NSString* phone;

@end

//
//  Person.m
//  ContactsWithEdit
//
//  Created by Mike on 14-12-10.
//  Copyright (c) 2014年 Mike. All rights reserved.
//

#import "Person.h"

@implementation Person

+(Person*) personWithName:(NSString *)name phone:(NSString *) phone
{
    Person *p = [[Person alloc] init];
    p.name = name;
    p.phone = phone;
    return p;

}
@end

工程下载地址：http://files.cnblogs.com/mikevictor07/ContactsWithInput.zip