【案列】私人通讯录01

1.登录界面

//
//  ViewController.m

#import "ViewController.h"
#import "MBProgressHUD+MJ.h"

@interface ViewController () <UITextFieldDelegate>
@property (weak, nonatomic) IBOutlet UITextField *accountField;
@property (weak, nonatomic) IBOutlet UITextField *pwdField;
@property (weak, nonatomic) IBOutlet UIButton *loginBtn;

@property (weak, nonatomic) IBOutlet UISwitch *rmbPwdSwitch;
@property (weak, nonatomic) IBOutlet UISwitch *autoLoginSwitch;
@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

// 给文本框添加监听
[self.accountField addTarget:self action:@selector(textChange) forControlEvents:UIControlEventEditingChanged];
[self.pwdField addTarget:self action:@selector(textChange) forControlEvents:UIControlEventEditingChanged];

// 判断登录按钮是否可以点击
[self textChange];
}

/**
*  segue跳转之前调用
*/
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// 传值给目标控制器
UIViewController *vc = segue.destinationViewController;
vc.title = [NSString stringWithFormat:@"%@的联系人",self.accountField.text];
}

/**
*  登录操作
*/
- (IBAction)loginBtnAction:(UIButton *)sender
{
// 添加蒙版
[MBProgressHUD showMessage:@"正在登录..."];

// 模拟请求网络
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

// 隐藏蒙版
[MBProgressHUD hideHUD];

// 验证帐号密码
if ([self.accountField.text isEqualToString:@"name"] && [self.pwdField.text isEqualToString:@"123"]) {
// 跳转到联系人界面
[self performSegueWithIdentifier:@"login2contact" sender:nil];
}else{
// 帐号或者密码错误
[MBProgressHUD showError:@"帐号或者密码错误"];
}
});

}

/**
*  记住密码开关状态改变的时候调用
*/
- (IBAction)rmbPwdChnage:(UISwitch *)sender
{
// 如果取消记住密码，自动登录也需要取消选中
if (self.rmbPwdSwitch.on == NO) {
[self.autoLoginSwitch setOn:NO animated:YES];
}
}

/**
*  自动登录开关状态改变的时候调用
*/
- (IBAction)autoLoginChnage:(UISwitch *)sender
{
// 如果选中了自动登录，那么记住密码也要选中
if (self.autoLoginSwitch.on == YES) {
[self.rmbPwdSwitch setOn:YES animated:YES];
}
}

/**
*  文本框内容改变了
*/
- (void)textChange
{
self.loginBtn.enabled = self.accountField.text.length && self.pwdField.text.length;
}

@end

2.联系人

注意联系人界面是从登录界面控制器segue过来的，并不是从『登录按钮』直接segue过来的

//
//  ContactViewController.m

#import "ContactViewController.h"
#import "AddViewController.h"
#import "Contact.h"
#import "EditViewController.h"

@interface ContactViewController ()<AddViewControllerDelegate>

/**
*  保存Contact模型对象的数组
*/
@property(nonatomic,strong)NSMutableArray *contacts;

@end

@implementation ContactViewController

- (NSMutableArray *)contacts
{
if (_contacts == nil) {
_contacts = [NSMutableArray array];
}
return _contacts;
}

- (void)viewDidLoad {
[super viewDidLoad];

// 取消分割线
//    self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

// tableView有数据的时候才需要分割线
self.tableView.tableFooterView = [[UIView alloc] init];
}

/**
*  segue跳转之前会调用
*/
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// 给添加控制器传递联系人控制器属性
AddViewController *addVC = segue.destinationViewController;
addVC.delegate = self;
}

#pragma mark - AddViewControllerDelegate
- (void)addViewController:(AddViewController *)addVC didClickAddBtnWithContact:(Contact *)contact
{
// 把联系人模型保存到数组里面
[self.contacts addObject:contact];

// 刷新表格
[self.tableView reloadData];
}

/**
*  点击注销的时候会调用
*/
- (IBAction)logout:(UIBarButtonItem *)sender
{
// alert控制器
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"是否要注销" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
[alert addAction:[UIAlertAction actionWithTitle:@"注销" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
// 注销
[self.navigationController popViewControllerAnimated:YES];
}]];
[alert addAction:[UIAlertAction actionWithTitle:@"不" style:UIAlertActionStyleCancel handler:nil]];

// 弹出
[self presentViewController:alert animated:YES completion:nil];
}

#pragma mark - Table view data source

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// 创建cell
static NSString *ID = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:ID];
}

// 配置cell
Contact *c = self.contacts[indexPath.row];
cell.textLabel.text = c.name;
cell.detailTextLabel.text = c.phone;

return cell;
}

#pragma mark - tabviewdelegate

/**
*  点击cell的时候调用
*/
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// 加载stroryborad(我们这里从storyboard创建控制器)
UIStoryboard *sb = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

// 创建编辑控制器
// "edit"标识符 在Main.storyboard
EditViewController *edit = [sb instantiateViewControllerWithIdentifier:@"edit"];

edit.contact = self.contacts[indexPath.row];

// 设置block 要执行的
edit.block = ^(Contact *contact){
[self.contacts replaceObjectAtIndex:indexPath.row withObject:contact];

// 刷新表格
[self.tableView reloadData];
};

// 跳转到编辑界面
[self.navigationController pushViewController:edit animated:YES];
}

@end

联系人模型：

//
//  Contact.h

#import <Foundation/Foundation.h>

@interface Contact : NSObject

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

/**
*  快速返回一个联系人模型对象
*/
+ (instancetype)contactWithName:(NSString *)name phone:(NSString *)phone;

@end

//
//  Contact.m

#import "Contact.h"

@implementation Contact

+ (instancetype)contactWithName:(NSString *)name phone:(NSString *)phone
{
Contact *c = [[self alloc] init];
c.name = name;
c.phone = phone;

return c;
}

@end

3.添加联系人

//
//  AddViewController.h

#import <UIKit/UIKit.h>

// 代理
@class AddViewController,Contact;

@protocol AddViewControllerDelegate <NSObject>

@optional
- (void)addViewController:(AddViewController *)addVC didClickAddBtnWithContact:(Contact *)contact;

@end

@interface AddViewController : UIViewController

// 代理属性
@property(nonatomic,weak) id<AddViewControllerDelegate> delegate;

@end

//
//  AddViewController.m

#import "AddViewController.h"
#import "Contact.h"
#import "ContactViewController.h"

@interface AddViewController ()

@property (weak, nonatomic) IBOutlet UITextField *nameField;
@property (weak, nonatomic) IBOutlet UITextField *phoneField;
@property (weak, nonatomic) IBOutlet UIButton *addBtn;

@end

@implementation AddViewController
- (IBAction)addBtnAction:(UIButton *)sender
{
// 1.把姓名和电话包装成Contact模型对象
Contact *c = [Contact contactWithName:self.nameField.text phone:self.phoneField.text];

// 2.通知代理
if ([self.delegate respondsToSelector:@selector(addViewController:didClickAddBtnWithContact:)]) {
[self.delegate addViewController:self didClickAddBtnWithContact:c];
}

// 3.跳转回 联系人控制器
[self.navigationController popViewControllerAnimated:YES];
}

- (void)viewDidLoad {
[super viewDidLoad];

// 给文本框添加监听
[self.nameField addTarget:self action:@selector(textChange) forControlEvents:UIControlEventEditingChanged];
[self.phoneField addTarget:self action:@selector(textChange) forControlEvents:UIControlEventEditingChanged];
}

- (void)viewDidAppear:(BOOL)animated
{
// 姓名文本框成为第一响应者(会弹出键盘)
[self.nameField becomeFirstResponder];
}

/**
*  文本框内容改变了
*/
- (void)textChange
{
self.addBtn.enabled = self.nameField.text.length && self.phoneField.text.length;
}

@end

3.编辑联系人

编辑完成需要讲新的联系人数据传递给联系人控制器，我们这里没有想 添加联系人控制器一下使用代理，而是换了一种方法block。2种方法都可以实现。



(注意我们编辑界面也在storyboard里，设置了标识符"edit")

//
//  EditViewController.h

#import <UIKit/UIKit.h>

@class Contact;

// 定义block
typedef void(^EditViewControllerBlock)(Contact *contact);

@interface EditViewController : UIViewController

// block属性
@property(nonatomic,strong) EditViewControllerBlock block;

/**
*  联系人模型对象
*/
@property(nonatomic,strong) Contact *contact;

@end

//
//  EditViewController.m

#import "EditViewController.h"
#import "Contact.h"

@interface EditViewController ()
@property (weak, nonatomic) IBOutlet UITextField *nameField;
@property (weak, nonatomic) IBOutlet UITextField *phoneField;

@property (weak, nonatomic) IBOutlet UIButton *saveBtn;
@end

@implementation EditViewController

- (void)setContact:(Contact *)contact
{
_contact = contact;
}

/**
*  保存操作
*/
- (IBAction)saveBtnAction:(UIButton *)sender
{
// 把文本框的值包装成联系人模型
Contact *c = [Contact contactWithName:self.nameField.text phone:self.phoneField.text];

// 通知联系人控制修改了模型数据，刷新表格
#warning 可以用代理和block，我们这里用block实现
if (self.block) {
self.block(c); //调用block
}

// 返回联系人控制器
[self.navigationController popViewControllerAnimated:YES];
}

- (void)viewDidLoad {
[super viewDidLoad];

// 设置导航条的标题
self.title = @"查看/编辑";

// 设置导航条右边的按钮
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"编辑" style:UIBarButtonItemStyleDone target:self action:@selector(edit:)];

// 给文本框设置值
self.phoneField.text = self.contact.phone;
self.nameField.text = self.contact.name;

// 给文本框添加监听
[self.nameField addTarget:self action:@selector(textChange) forControlEvents:UIControlEventEditingChanged];
[self.phoneField addTarget:self action:@selector(textChange) forControlEvents:UIControlEventEditingChanged];
}

/**
*  文本框内容改变了
*/
- (void)textChange
{
self.saveBtn.enabled = self.nameField.text.length && self.phoneField.text.length;
}

/**
*  点击了"编辑"
*/
- (void)edit:(UIBarButtonItem *)item
{
if ([item.title isEqualToString:@"编辑"]) {
// 更改右上角按钮标题
item.title = @"取消";

self.phoneField.enabled = YES;
self.nameField.enabled = YES;

// 弹出电话文本框的内容
[self.phoneField becomeFirstResponder];

// 显示"保存"按钮
self.saveBtn.hidden = NO;
}else if ([item.title isEqualToString:@"取消"]){
item.title = @"编辑";

self.phoneField.enabled = NO;
self.nameField.enabled = NO;

self.saveBtn.hidden = YES;

// 还原数据
self.nameField.text = self.contact.name;
self.phoneField.text = self.contact.phone;

// 不允许编辑 键盘会自动隐藏
//        [self.view endEditing:YES];
}
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/

@end