主要是用sqlite3来存储聊天记录
先导入sqlite3.dylib, 点 Add Other,同时按住shift+command+G, 在弹出的Go to the folder中输入/usr/lib/libsqlite3.dylib,就OK了。 还需要import<sqlite3.h>
1.new file一个Text类用来存储，.m无需操作
1 #import <Foundation/Foundation.h> 2 3 @interface Text : NSObject 4 //聊天内容 5 @property(nonatomic,copy)NSString *userText; 6 //聊天内容发送的时间 7 @property(nonatomic,copy)NSString *currentTime; 8 @end
2.另封装一个TextModel类用来操作数据
1 #import <Foundation/Foundation.h> 2 #import <sqlite3.h> 3 @class Text; 4 @interface TextModel : NSObject 5 //建表 6 -(BOOL)createList:(sqlite3 *)db; 7 //插入 8 -(BOOL)insertList:(Text *)insertList; 9 //获取数据 10 -(NSMutableArray *)getList; 11 @end
.m
//
// TextModel.m
// 保存聊天记录
//
// Created by [email protected] on 16/4/4.
// Copyright © 2016年 [email protected] All rights reserved.
//
#import "TextModel.h"
#import "Text.h"
@implementation TextModel
//定义一个变量
static sqlite3 *_database;
-(NSString *)filename{
NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
//这里打印，是方便用MesaSQLite打开sqlite3文件,可以增删改查，非常方便,主要是免费~~~
NSLog(@"%@",path);
return [path stringByAppendingPathComponent:@"LIKE.sqlite"];
}
-(BOOL)openDB{
//获取路径
NSString *path = [self filename];
NSFileManager *fileManager = [NSFileManager defaultManager];
//判断数据库是否存在
BOOL find = [fileManager fileExistsAtPath:path];
//如果为真，就打开数据库，不存在，自动创建
if (find) {
NSLog(@"database存在");
if (sqlite3_open([path UTF8String], &_database)!=SQLITE_OK) {
//failed关闭，据说这个习惯好，不明觉厉
sqlite3_close(_database);
NSLog(@"打开database失败");
return NO;
}
//建表
[self createList:_database];
return YES;
}
//同上
if (sqlite3_open(path.UTF8String, &_database) == SQLITE_OK) {
[self createList:_database];
return YES;
}else{
sqlite3_close(_database);
NSLog(@"打开database失败");
return NO;
}
return NO;
}
#pragma mark -- 建表
-(BOOL)createList:(sqlite3 *)db{
//我这里缺少一个主键，自己加上即可--ID INTEGER PRIMARY KEY AUTOINCREMENT
NSString *sql = [NSString stringWithFormat:@"CREATE TABLE IF NOT EXISTS DRINK(userText TEXT,currentTime TEXT)"];
sqlite3_stmt *stmt;
//sqlite3_prepare_v2 接口把一条SQL语句解析到statement结构里去. 使用该接口访问数据库是当前比较好的的一种方法
NSInteger sqlReturn = sqlite3_prepare_v2(_database, sql.UTF8String, -1, &stmt, NULL);
//-1是sql语句的长度，<0会自动计算
if (sqlReturn != SQLITE_OK) {
NSLog(@"创建表失败");
return NO;
}
int success = sqlite3_step(stmt);
//释放stmt
sqlite3_finalize(stmt);
if (success != SQLITE_DONE) {
NSLog(@"创建表失败");
return NO;
}
NSLog(@"创建表成功");
return YES;
}
#pragma mark -- 插入
-(BOOL)insertList:(Text *)insertList{
if ([self openDB])
{
sqlite3_stmt *stmt;
//?表示待会儿插入
NSString *sql = [NSString stringWithFormat:@"INSERT INTO DRINK(userText,currentTime)VALUES(?,?)"];
//int success = sqlite3_exec(_database, sql.UTF8String, NULL, NULL, &error);
int success = sqlite3_prepare_v2(_database, sql.UTF8String, -1, &stmt, NULL);
if (success != SQLITE_OK) {
NSLog(@"insert failed");
sqlite3_close(_database);
return NO;
}
sqlite3_bind_text(stmt, 1, [insertList.userText UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(stmt, 2, [insertList.currentTime UTF8String], -1, SQLITE_TRANSIENT);
//执行插入语句
success = sqlite3_step(stmt);
//释放stmt
sqlite3_finalize(stmt);
NSLog(@"%@",insertList.userText);
NSLog(@"%@",insertList.currentTime);
//如果failed
if (success == SQLITE_ERROR) {
NSLog(@"failed insert into database");
sqlite3_close(_database);
return NO;
}
sqlite3_close(_database);
return YES;
}
return NO;
}
#pragma mark -- 获取
-(NSMutableArray *)getList{
NSMutableArray *array = nil;
//判断是否打开,这里可以用 dispatch_once 只执行一次
if ([self openDB]) {
sqlite3_stmt *stmt;
NSString *sql = [NSString stringWithFormat:@"SELECT userText,currentTime FROM DRINK"];
if (sqlite3_prepare_v2(_database, sql.UTF8String, -1, &stmt, NULL) != SQLITE_OK) {
NSLog(@"failed to get list");
}else{
array = [NSMutableArray array];
//遍历记录，这里是从0开始，别写错了
while (sqlite3_step(stmt) == SQLITE_ROW) {
Text *p = [[Text alloc]init];
char *strText = (char *)sqlite3_column_text(stmt, 0);
//做个判断，如果记录为nil，不执行，这里自己要想一下，为什么要判断
if (strText != NULL) {
p.userText = [NSString stringWithUTF8String:strText];
}
char *strTime = (char *)sqlite3_column_text(stmt, 1);
//时间为Null，不执行
if (strTime != NULL) {
p.currentTime = [NSString stringWithUTF8String:strTime];
}
//加进可变数组
[array addObject:p];
}
}
//释放stmt
sqlite3_finalize(stmt);
sqlite3_close(_database);
}
return array;
}
@end
3.ViewController .h,在storyboard 拖一个tableview和一个textfield
#import <UIKit/UIKit.h> @interface ViewController : UIViewController @property (weak, nonatomic) IBOutlet UITableView *tableview; @property (weak, nonatomic) IBOutlet UITextField *textField; @end
.m
//
// ViewController.m
// 保存聊天记录
//
// Created by [email protected] on 16/4/4.
// Copyright © 2016年 [email protected] All rights reserved.
//
#import "ViewController.h"
#import "TableViewCell.h"
#import "Text.h"
#import "TextModel.h"
//实现UITablevView和UITextField的代理
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate,UITextFieldDelegate>
//数据源
@property(nonatomic,strong)NSMutableArray *dataSource;
//处理数据的类
@property(nonatomic,strong)TextModel *textModel;
@end
@implementation ViewController
//加载数据
-(void)reloadDataSource{
if (_textModel == nil) {
_textModel = [[TextModel alloc]init];
}
//获取数据
_dataSource = [_textModel getList];
}
- (void)viewDidLoad {
[super viewDidLoad];
//设置代理
_textField.delegate = self;
//调用加载数据方法
[self reloadDataSource];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
-(void)sendMessageContent:(NSString *)text{
//获取时间
NSDate *date = [NSDate date];
NSDateFormatter *dateForMatter = [[NSDateFormatter alloc]init];
//hh：mm是09：54这样的格式，可以自由发挥
dateForMatter.dateFormat = @"hh:mm";
NSString *timeString = [dateForMatter stringFromDate:date];
Text *t = [[Text alloc]init];
//把时间存到Text的属性
t.currentTime = timeString;
//输入的内容
t.userText = text;
//插入到数据库
[_textModel insertList:t];
}
#pragma mark -- UITextField代理
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
//自定义方法，把输入的内容存到Text
[self sendMessageContent:textField.text];
//取消第一响应
[textField resignFirstResponder];
//清空键盘
textField.text = @"";
//插入之后，加载一次数据，相当于往数据源里加数据
[self reloadDataSource];
//刷新界面，显示刚插入的数据
[_tableview reloadData];
return YES;
}
#pragma mark -- TableView数据源
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return _dataSource.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
Text *p = _dataSource[indexPath.row];
//自定义Cell
TableViewCell *cell = [TableViewCell tableView:tableView];
//cell不可点击
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.timeLabel.text = p.currentTime;
cell.OtherLabel.text = p.userText;
return cell;
}
#pragma mark -- 代理方法
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return 80;
}
@end
4.自定义cell
#import <UIKit/UIKit.h> @interface TableViewCell : UITableViewCell //聊天内容 @property (strong, nonatomic)UILabel *OtherLabel; //时间 @property (strong, nonatomic)UILabel *timeLabel; //头像，这个自己随便找个图 @property(strong,nonatomic)UIImageView *meImageView; +(instancetype)tableView:(UITableView *)tableView; @end
.m
//
// TableViewCell.m
// 保存聊天记录
//
// Created by [email protected] on 16/4/4.
// Copyright © 2016年 [email protected] All rights reserved.
//
#import "TableViewCell.h"
@implementation TableViewCell
//初始化的时候，创建控件
-(id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
CGFloat width = [UIScreen mainScreen].bounds.size.width;
_OtherLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 40, width-40, 30)];
_OtherLabel.font = [UIFont systemFontOfSize:16];
_OtherLabel.numberOfLines = 0;
_OtherLabel.lineBreakMode = NSLineBreakByTruncatingTail;
_OtherLabel.textAlignment = NSTextAlignmentRight;
[self.contentView addSubview:_OtherLabel];
_timeLabel = [[UILabel alloc]initWithFrame:CGRectMake(width/2-20, 0, 40, 20)];
_timeLabel.font = [UIFont systemFontOfSize:12];
[self.contentView addSubview:_timeLabel];
_meImageView = [[UIImageView alloc]initWithFrame:CGRectMake(width-40, 10, 30, 30)];
_meImageView.image = [UIImage imageNamed:@"003"];
[self.contentView addSubview:_meImageView];
}
return self;
}
+(instancetype)tableView:(UITableView *)tableView{
TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ChatTableViewCell"];
//cell复用
if (cell == nil) {
cell = [[TableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"ChatTableViewCell"];
}
return cell;
}
@end
时间： 2024-10-12 17:08:48