1.首先创建个模型类User类
.h
#import <Foundation/Foundation.h>
//因为是自定义的类，是用plist持久化须采用<NSCoding>协议
@interface User : NSObject<NSCoding>
@property(nonatomic,assign)NSInteger ID;
@property(nonatomic,strong)NSString *phone;
@property(nonatomic,strong)NSString *password;
@property(nonatomic,strong)NSString *name;
@end
.m
#import "User.h"
@implementation User
#pragma mark - NSCoding协议
//归档操作的两个必须实现的方法
//把对象的每一个属性对象作成二进制数据
-(void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:self.phone forKey:@"phone"];
[aCoder encodeObject:self.password forKey:@"password"];
[aCoder encodeObject:self.name forKey:@"name"];
}
//通过key将对象的每一个属性由二进制转换为OC类型
-(instancetype)initWithCoder:(NSCoder *)aDecoder
{
self = [super init];
if (self) {
self.phone = [aDecoder decodeObjectForKey:@"phone"];
self.password = [aDecoder decodeObjectForKey:@"password"];
self.name = [aDecoder decodeObjectForKey:@"name"];
}
return self;
}
#pragma mark - NSCopying
-(id)copy
{
User *u = [[User alloc]init];
u.phone = self.phone;
u.name = self.name;
u.password = self.password;
u.ID = self.ID;
return u;
}
@end
2.创建一个业务类plistDataBase
.h
#import <Foundation/Foundation.h>
@protocol DataBase <NSObject>
@required
///添加
-(BOOL)addNew:(id)newObj;
///删除
-(BOOL)deleteOne:(id)deleteObj;
///修改
-(BOOL)updateOne:(id)upObj;
///查询
-(id)getAllobjects;
@optional
///是否重复
-(BOOL)objExist:(id)obj;
@end
.m
#import "PlistDataBase.h"
#import "User.h"
@implementation PlistDataBase
//私有方法，持久化数据的文件的路径设置
-(NSString *)filePath
{
// 获取document路径
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
NSLog(@"%@",documentPath);
//设置持久化文件的路径
NSString *fpath = [documentPath stringByAppendingPathComponent:@"user.plist"];
return fpath;
}
///添加
-(BOOL)addNew:(User *)newObj
{
//首次添加，持久化文件不存在，数据库为空
if (![[NSFileManager defaultManager]fileExistsAtPath:[self filePath]]) {
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:newObj];
NSArray *arr = @[data];
[arr writeToFile:[self filePath] atomically:YES];
return YES;
}
//文件存在，从文件中读取数据，存入数组中
NSMutableArray *arr = [[NSMutableArray alloc]initWithContentsOfFile:[self filePath]];
//如果数组元素为空
if (arr.count == 0) {
[arr addObject:[NSKeyedArchiver archivedDataWithRootObject:newObj]];
[arr writeToFile:[self filePath] atomically:YES];
return YES;
}
//数组元素不为空，须判断手机号是不是存在，存在不可添加，不存在可以添加
if ([self objExist:newObj]) {
return NO;
}
[arr addObject:[NSKeyedArchiver archivedDataWithRootObject:newObj]];
[arr writeToFile:[self filePath] atomically:YES];
return YES;
}
///删除
-(BOOL)deleteOne:(id)deleteObj
{
//从文件中读取所有的二进制对象数据，存入数组中
NSMutableArray *arr = [[NSMutableArray alloc]initWithContentsOfFile:[self filePath]];
//将参数User*对象转换成NSdata数据
NSData *deletData = [NSKeyedArchiver archivedDataWithRootObject:deleteObj];
//从数组中删除该数据
[arr removeObject:deletData];
//数组重新写入文件
[arr writeToFile:[self filePath] atomically:YES];
return YES;
}
///修改
-(BOOL)updateOne:(User *)upObj
{
//获取持久化的数据
NSMutableArray *arr = [[NSMutableArray alloc]initWithContentsOfFile:[self filePath]];
NSInteger index = [self getObjIndexByPhone:upObj.phone];
[arr replaceObjectAtIndex:index withObject:[NSKeyedArchiver archivedDataWithRootObject:upObj]];
return [arr writeToFile:[self filePath] atomically:YES];
}
///查询
-(id)getAllobjects
{
//文件不存在，返回空
if (![[NSFileManager defaultManager]fileExistsAtPath:[self filePath]]) {
return nil;
}
//文件存在，从文件中读取数组
NSArray *arr = [[NSArray alloc]initWithContentsOfFile:[self filePath]];
NSMutableArray *userArr = [[NSMutableArray alloc]init];
for (NSData *data in arr) {
User *u = [NSKeyedUnarchiver unarchiveObjectWithData:data];
[userArr addObject:u];
}
return userArr;
}
#pragma mark -私有方法
///是否重复
-(BOOL)objExist:(User *)obj
{
//读出文件中的所有数据
NSArray *arr = [[NSArray alloc]initWithContentsOfFile:[self filePath]];
for (NSData *data in arr) {
User * u = [NSKeyedUnarchiver unarchiveObjectWithData:data];
if ([u.phone isEqualToString:obj.phone]) {
return YES;
}
}
return NO;
}
///通过User对象的唯一手机号，找到该对象在数组中的下标
-(NSInteger)getObjIndexByPhone:(NSString *)phone
{
NSArray *arr = [[NSArray alloc]initWithContentsOfFile:[self filePath]];
for (int i = 0; i < arr.count; i ++) {
NSData *data = arr[i];
User *u = [NSKeyedUnarchiver unarchiveObjectWithData:data];
if ([u.phone isEqualToString:phone]) {
return i;
}
}
return -1;
}
@end
3.数据展示，创建一个ShowViewController
.h
#import <UIKit/UIKit.h>
@interface ShowViewController : UIViewController
@end
.m
#import "ShowViewController.h"
#import "AddViewController.h"
#import "PlistDataBase.h"
#import "DetailViewController.h"
#import "User.h"
@interface ShowViewController ()<UITableViewDelegate,UITableViewDataSource>
{
NSMutableArray *_tableDataArr;//给表格赋值的数组
}
//表格视图
@property(nonatomic,strong) UITableView *tableView;
@property(nonatomic,strong) AddViewController *addVC;
@property(nonatomic,strong) DetailViewController *detailVC;
@property(nonatomic,strong) id db;//数据库处理对象
@end
@implementation ShowViewController
#pragma mark --------懒加载，属性getter重写----
-(UITableView *)tableView
{
if (!_tableView) {
_tableView = [[UITableView alloc]initWithFrame:self.view.frame style:UITableViewStylePlain];
_tableView.dataSource = self;
_tableView.delegate = self;
}
return _tableView;
}
-(DetailViewController *)detailVC
{
if (!_detailVC) {
_detailVC = [[DetailViewController alloc]init];
}
return _detailVC;
}
-(AddViewController *)addVC
{
if (!_addVC) {
_addVC = [[AddViewController alloc]init];
}
return _addVC;
}
-(id)db
{
if (!_db) {
//策略模式
_db = [[PlistDataBase alloc]init];
}
return _db;
}
#pragma mark ------视图加载方法---------
//添加子视图
-(void)loadView
{
[super loadView];
NSLog(@"%@",NSStringFromSelector(_cmd));
NSLog(@"%@",NSStringFromSelector(@selector(loadView)));
[self.view addSubview:self.tableView];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addDidHandle:)];
}
-(void)addDidHandle:(id)sender
{
[self.navigationController pushViewController:self.addVC animated:YES];
}
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
_tableDataArr = [self.db getAllobjects];
[self.tableView reloadData];
}
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(@"%@",NSStringFromSelector(_cmd));
// Do any additional setup after loading the view.
}
#pragma mark ---------UITableViewDataSource;
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return _tableDataArr.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *identifier = @"CELLID";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (!cell) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
}
User *u = _tableDataArr[indexPath.row];
cell.textLabel.text = [NSString stringWithFormat:@"id:%ld---phone:%@",u.ID,u.phone];
cell.detailTextLabel.text = [NSString stringWithFormat:@"name---:%@\t\tpassword----:%@",u.name,u.password];
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
//先删除底层数据
[self.db deleteOne:_tableDataArr[indexPath.row]];
//删除给表格赋值的数组中对应的数据
[_tableDataArr removeObjectAtIndex:indexPath.row];
//删除单元格
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView reloadData];
}
}
#pragma mark -------UITableViewDelegate----------
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
self.detailVC.u = _tableDataArr[indexPath.row];
[self.navigationController pushViewController:self.detailVC animated:NO];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#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
4.数据的添加 创建一个AddViewController
.h
#import <UIKit/UIKit.h>
@interface AddViewController : UIViewController
@end
.m
#import "AddViewController.h"
#import "PlistDataBase.h"
#import "User.h"
#import "MBProgressHUD.h"
@interface AddViewController ()
{
MBProgressHUD *_hud; //第三方
}
@property (weak, nonatomic) IBOutlet UITextField *phoneTF;
@property (weak, nonatomic) IBOutlet UITextField *nameTF;
@property (weak, nonatomic) IBOutlet UITextField *passwordTF;
- (IBAction)saveHandle:(id)sender;
@end
@implementation AddViewController
-(void)viewWillAppear:(BOOL)animated
{
// 文本清空
[super viewWillAppear:animated];
self.phoneTF.text = @"";
self.nameTF.text = @"";
self.passwordTF.text = @"";
}
-(void)viewWillDisappear:(BOOL)animated
{
// 文本清空
[super viewWillDisappear:animated];
self.phoneTF.text = @"";
self.nameTF.text = @"";
self.passwordTF.text = @"";
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
_hud = [[MBProgressHUD alloc]initWithView:self.view];
[self.view addSubview:_hud];
[_hud hide:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#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.
}
*/
- (IBAction)saveHandle:(id)sender {
if (self.phoneTF.text.length == 0 || self.passwordTF.text.length == 0 || self.nameTF.text.length == 0) {
//设置弹出框为文本样式
_hud.mode = MBProgressHUDModeText;
//设置提示文本
_hud.labelText = @"输入不可为空";
//显示
[_hud show:YES];
//2秒后隐藏
[_hud hide:YES afterDelay:2.0];
return;
}
id db = [[PlistDataBase alloc]init];
User *u = [[User alloc]init];
u.phone = self.phoneTF.text;
u.password = self.passwordTF.text;
u.name = self.nameTF.text;
BOOL success = [db addNew:u];
if (success) {
//设置弹出框为文本样式
_hud.mode = MBProgressHUDModeText;
//设置提示文本
_hud.labelText = @"添加成功";
//显示
[_hud show:YES];
//延时触发
[self performSelector:@selector(back:) withObject:nil afterDelay:2.0];
}else
{
//设置弹出框为文本样式
_hud.mode = MBProgressHUDModeText;
//设置提示文本
_hud.labelText = @"用户已存在";
//显示
[_hud show:YES];
//2秒后隐藏
[_hud hide:YES afterDelay:2.0];
}
}
-(void)back:(id)sender
{
if (_hud.isHidden == NO) {
[_hud hide:YES];
}
[self.navigationController popViewControllerAnimated:YES];
}
@end
5.数据的修改 创建DetailViewController
.h
#import <UIKit/UIKit.h>
@interface DetailViewController : UIViewController
@property(nonatomic,strong) User *u;
@end
.m
#import "DetailViewController.h"
#import "PlistDataBase.h"
@interface DetailViewController ()
{
MBProgressHUD *hub;
}
@property (weak, nonatomic) IBOutlet UITextField *phoneTF;
@property (weak, nonatomic) IBOutlet UITextField *passWordTF;
@property (weak, nonatomic) IBOutlet UITextField *nameTF;
- (IBAction)change:(id)sender;
@end
@implementation DetailViewController
-(void)viewWillAppear:(BOOL)animated
{
self.phoneTF.text = self.u.phone;
self.nameTF.text = self.u.name;
self.passWordTF.text = self.u.password;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)change:(id)sender {
// User *newu = [[User alloc]init];
// newu.ID = self.u.ID;
// newu.phone = self.u.phone;
// newu.password = self.u.password;
// newu.name = self.u.name;
//这句代码实现与上面四句代码等效的效果
User *newu = [self.u copy];
newu.password = self.passWordTF.text;
newu.name = self.nameTF.text;
PlistDataBase *db = [[PlistDataBase alloc]init];
BOOL success = [db updateOne:newu];
hub = [[MBProgressHUD alloc]initWithView:self.view];
[self.view addSubview:hub];
hub.removeFromSuperViewOnHide = YES;
// if (success) {
// hub.labelText = @"更新成功";
// }else
// {
// hub.labelText = @"更新失败";
// }
hub.labelText = success ? @"更新成功" : @"更新失败";
hub.mode = MBProgressHUDModeText;
[hub show:YES];
[self performSelector:@selector(back:) withObject:nil afterDelay:2.0];
}
-(void)back:(id)sender
{
if (hub.isHidden == NO) {
[hub hide:YES];
}
[self.navigationController popViewControllerAnimated:YES];
}
@end
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