【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blocktypedef 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