用oc写一个通讯录列表

以下是一个简单的通讯录列表的OC代码实现：

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

@interface Contact : NSObject

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

- (instancetype)initWithName:(NSString *)name phone:(NSString *)phone;

@end


// Contact.m
#import "Contact.h"

@implementation Contact

- (instancetype)initWithName:(NSString *)name phone:(NSString *)phone {
    self = [super init];
    if (self) {
        self.name = name;
        self.phone = phone;
    }
    return self;
}

@end


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

@interface ContactCell : UITableViewCell

@property (nonatomic, strong) UILabel *nameLabel;
@property (nonatomic, strong) UILabel *phoneLabel;

@end


// ContactCell.m
#import "ContactCell.h"

@implementation ContactCell

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        self.nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(15, 10, 200, 20)];
        [self.contentView addSubview:self.nameLabel];
        
        self.phoneLabel = [[UILabel alloc] initWithFrame:CGRectMake(15, 35, 200, 20)];
        [self.contentView addSubview:self.phoneLabel];
    }
    return self;
}

@end


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

@interface ContactListViewController : UITableViewController

@end


// ContactListViewController.m
#import "ContactListViewController.h"
#import "Contact.h"
#import "ContactCell.h"

@interface ContactListViewController ()

@property (nonatomic, strong) NSMutableArray<Contact *> *contacts;

@end

@implementation ContactListViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.navigationItem.title = @"Contacts";
    UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addContact)];
    self.navigationItem.rightBarButtonItem = addButton;
    
    self.contacts = [NSMutableArray array];
    
    Contact *contact1 = [[Contact alloc] initWithName:@"John Smith" phone:@"555-1234"];
    [self.contacts addObject:contact1];
    
    Contact *contact2 = [[Contact alloc] initWithName:@"Jane Doe" phone:@"555-5678"];
    [self.contacts addObject:contact2];
    
    [self.tableView registerClass:[ContactCell class] forCellReuseIdentifier:@"ContactCell"];
}

#pragma mark - Table view data source

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    ContactCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ContactCell" forIndexPath:indexPath];
    
    Contact *contact = self.contacts[indexPath.row];
    cell.nameLabel.text = contact.name;
    cell.phoneLabel.text = contact.phone;
    
    return cell;
}

#pragma mark - Actions

- (void)addContact {
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Add Contact" message:nil preferredStyle:UIAlertControllerStyleAlert];
    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.placeholder = @"Name";
    }];
    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.placeholder = @"Phone";
    }];
    UIAlertAction *addAction = [UIAlertAction actionWithTitle:@"Add" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        UITextField *nameField = alert.textFields[0];
        UITextField *phoneField = alert.textFields[1];
        Contact *contact = [[Contact alloc] initWithName:nameField.text phone:phoneField.text];
        [self.contacts addObject:contact];
        [self.tableView reloadData];
    }];
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:nil];
    [alert addAction:addAction];
    [alert addAction:cancelAction];
    [self presentViewController:alert animated:YES completion:nil];
}

@end

在这个实现中，我们创建了一个`Contact`类来表示每个联系人，一个`ContactCell`类来自定义通讯录列表中的单元格，一个`ContactListViewController`类来管理通讯录列表。我们使用`NSMutableArray`来存储所有的联系人，并在视图加载时向其中添加了一些示例联系人。

在`ContactListViewController`中，我们实现了`UITableViewDataSource`协议和`UITableViewDelegate`协议中的方法来显示通讯录列表和处理用户添加新联系人的操作。我们还添加了一个`UIBarButtonItem`，当用户点击它时会出现一个`UIAlertController`来允许用户输入新联系人的信息。最后，我们在`viewDidLoad`方法中注册了`ContactCell`类以供表视图使用。

这只是一个简单的例子，你可以根据自己的需要对其进行修改和扩展。