相机处理滤镜效果
滤镜主要使用在相机的美颜。
#import "ViewController.h" #import "ImageUtil.h" #import "ColorMatrix.h" @interface ViewController ()<UIActionSheetDelegate> @property (nonatomic, strong) UIImageView *filterView; @property (nonatomic, strong) UILabel *filterLabel; @end @implementation ViewController - (UIImageView *)filterView { if (_filterView == nil) { _filterView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 50.0f, self.view.frame.size.width, 200.0f)]; _filterView.userInteractionEnabled = YES; //contentMode是用来设置图片的显示方式，如居中、居右，是否缩放。 //特别注意：UIViewContentModeScaleToFill属性会导致图片变形。UIViewContentModeScaleAspectFit会保证图片比例不变，而且全部显示在ImageView中，这意味着ImageView会有部分空白。UIViewContentModeScaleAspectFill也会证图片比例不变，但是是填充整个ImageView的，可能只有部分图片显示出来。 //其它的当图片的大小超过屏幕的尺寸时，只有部分显示出来 _filterView.contentMode = UIViewContentModeScaleToFill; } return _filterView; } - (UILabel *)filterLabel { if (_filterLabel == nil) { _filterLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 300.0f, self.view.frame.size.width, 25.0f)]; _filterLabel.backgroundColor = [UIColor clearColor]; _filterLabel.textColor = [UIColor orangeColor]; _filterLabel.textAlignment = NSTextAlignmentCenter; } return _filterLabel; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. self.title = @"滤镜"; if ([[[UIDevice currentDevice] systemVersion] floatValue] > 7.0f) { self.edgesForExtendedLayout = UIRectEdgeNone; } self.filterView.image = [UIImage imageNamed:@"622.png"]; [self.view addSubview:self.filterView]; self.filterLabel.text = @"原图"; [self.view addSubview:self.filterLabel]; UIButton *sender = [UIButton buttonWithType:UIButtonTypeCustom]; [sender setTitle:@"滤镜" forState:UIControlStateNormal]; sender.frame = CGRectMake(self.view.frame.size.width/2.0f - 50.0f, 350.0f, 100.0f, 30.0f); sender.backgroundColor = [UIColor redColor]; sender.layer.cornerRadius = 5.0f; [sender addTarget:self action:@selector(senderAction) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:sender]; } #pragma mark - senderAction 按钮点击事件 - (void)senderAction { UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"滤镜" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"原图",@"LOMO",@"黑白",@"复古",@"哥特",@"锐化",@"淡雅",@"酒红",@"清宁",@"浪漫",@"光晕",@"蓝调",@"梦幻",@"夜色", nil]; [actionSheet showInView:self.view]; } #pragma mark - UIActionSheetDelegate - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { NSString *str = @""; switch (buttonIndex) { case 0: str = @"原图"; self.filterView.image = [UIImage imageNamed:@"622.png"]; break; case 1: str = @"LOMO"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_lomo]; break; case 2: str = @"黑白"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_heibai]; break; case 3: str = @"复古"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_huajiu]; break; case 4: str = @"哥特"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_gete]; break; case 5: str = @"锐化"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_ruise]; break; case 6: str = @"淡雅"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_danya]; break; case 7: str = @"酒红"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_jiuhong]; break; case 8: str = @"清宁"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_qingning]; break; case 9: str = @"浪漫"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_langman]; break; case 10: str = @"光晕"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_guangyun]; break; case 11: str = @"蓝调"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_landiao]; break; case 12: str = @"梦幻"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_menghuan]; break; case 13: str = @"夜色"; self.filterView.image = [ImageUtil imageWithImage:[UIImage imageNamed:@"622.png"] withColorMatrix:colormatrix_yese]; break; default: break; } self.filterLabel.text = str; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
代码：
#pragma mark (.h文件)-------------------------------------------------------------------------------------------------------- #pragma mark (.m文件)-------------------------------------------------------------------------------------------------------- #import "AppDelegate.h" @interface AppDelegate () @end @implementation AppDelegate - (void)dealloc { [_window release]; [super dealloc]; } - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. return YES; } }//这里面并没有写一个 Self.window.rootViewController = xx.vc ;是因为用了storyBoard,然后修改了程序的主入口
#pragma mark (.h文件)-------------------------------------------------------------------------------------------------------- #import <UIKit/UIKit.h> @interface ContactListController : UITableViewController @end #pragma mark (.m文件)-------------------------------------------------------------------------------------------------------- #import "ContactListController.h" #import "DataBaseHelper.h" #import "ContactDetailController.h" #import "AddContactController.h" #import "Contact.h" #import "ContactListCell.h" #import "FMDatabase.h"//第三方(数据库操作类) #import "DataBaseHelper.h" //指定代理对象所在的类服从协议_04 @interface ContactListController ()<updateDelegate> @property (nonatomic, retain) FMDatabase *database;//存储数据库操作对象 @property (nonatomic, retain) NSMutableArray *dataSource;//存储数据源 @end @implementation ContactListController #pragma mark -lazy loading- - (NSMutableArray *)dataSource { if (!_dataSource) { self.dataSource = [NSMutableArray arrayWithCapacity:0]; } return [[_dataSource retain] autorelease]; } - (void)viewDidLoad { [super viewDidLoad]; self.navigationItem.leftBarButtonItem = self.editButtonItem; //1.创建数据库 [self createDataBase]; //2.创建表 [self createTable]; //3.读取数据 [self selectDataFromDataBase]; } -(void)setEditing:(BOOL)editing animated:(BOOL)animated{ [super setEditing:editing animated:animated]; if (!editing) {// NO 编辑完成 self.view.userInteractionEnabled = NO; //将修改后的数据返回到上一个界面 } } #pragma mark -handle DataBase - - (void)createDataBase { //数据库操作对象 self.database = [FMDatabase databaseWithPath:[self getFilePath]]; } //创建表 - (void)createTable { //1.打开数据库 if (![self.database open]) { return; } //2.通过SQL语句操作数据库 （创建表） //executeUpdate: 除了查询指令，其他的都用这个方法 [self.database executeUpdate:@"create table if not exists Contacts(con_id integer primary key autoincrement, con_name text, con_gender text, con_age integer, con_phoneNum text, con_image blob)"]; //3.关闭数据库 [self.database close]; } //读取数据 - (void)selectDataFromDataBase { //1.打开数据库 if (![self.database open]) { return; } //2.通过SQL语句执行查询操作 FMResultSet *result = [self.database executeQuery:@"select * from Contacts"]; while ([result next]) { NSInteger ID = [result intForColumn:@"con_id"]; NSString *name = [result stringForColumn:@"con_name"]; NSString *gender = [result stringForColumn:@"con_gender"]; NSInteger age = [result intForColumn:@"con_age"]; NSString *phoneNum = [result stringForColumn:@"con_phoneNum"]; NSData *data = [result dataForColumn:@"con_image"]; UIImage *image = [UIImage imageWithData:data]; //把数据封装到Contact对象里 Contact *per = [[Contact alloc] initWithId:ID name:name gender:gender age:age phoneNum:phoneNum photoImage:image]; //存放到数组中 [self.dataSource addObject:per]; } //3.关闭数据库 [self.database close]; } - (NSString *)getFilePath { NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]; NSLog(@"%@", docPath); return [docPath stringByAppendingPathComponent:@"DB.sqlite"]; } //插入一条数据 - (void)insertIntoDataBaseWithContact:(Contact *)contact { //1.打开数据库 if (![self.database open]) { return; } //2.通过SQL语句操作数据库（插入一条数据） NSData *data = UIImagePNGRepresentation(contact.photoImage); [self.database executeUpdate:@"insert into Contacts(con_name, con_gender, con_age, con_phoneNum, con_image) values(?, ?, ?, ?, ?)", contact.name, contact.gender, @(contact.age), contact.phoneNum, data]; //3.关闭数据库 [self.database close]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } #pragma mark - Table view data source - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. return _dataSource.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { ContactListCell *cell = [tableView dequeueReusableCellWithIdentifier:@"reuse" forIndexPath:indexPath]; Contact *per = self.dataSource[indexPath.row]; // Configure the cell... cell.nameLabel.text = per.name; cell.phoneNumLabel.text = per.phoneNum; return cell; } // 提交编辑的方法 - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { //1.数据源的删除 Contact * per = self.dataSource[indexPath.row]; //从数据库删除该条数据 [self deleteFromDataBaseWithContact:per]; //从数组里移除 [self.dataSource removeObjectAtIndex:indexPath.row]; //2.界面的删除 //当前只有一个分区，所以不判断分区 [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade]; } else if (editingStyle == UITableViewCellEditingStyleInsert) { } } //删除一条数据 -(void)deleteFromDataBaseWithContact:(Contact *)contact{ BOOL isOpen = [self.database open]; if (!isOpen) { return; } [self .database executeUpdate:@"delete from Contacts where con_id = ?",@(contact.con_id)]; //关闭数据库 [self.database close]; } /* // Override to support rearranging the table view. - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath { } */ /* // Override to support conditional rearranging of the table view. - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the item to be re-orderable. return YES; } */ //用于刷新数据 /*下面插入数据后已经刷新了数据 -(void)viewWillAppear:(BOOL)animated{ [super viewWillAppear:animated]; [self.dataSource removeAllObjects]; [self selectDataFromDataBase]; [self.tableView reloadData]; NSLog(@"%@@@@@",((Contact *)self.dataSource[0]).name); } */ #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation //使用 StoryBoard 进行页面跳转的时候，它会自动的走这个方法。在这个方法我们可以做一些需要的相应的操作方法。 //参数：第一个参数 segue 就是跳转的线 第二个参数 sender 就是我们跳转的时候要传的参数 destinationViewController是一个导航控制器。 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller. __block ContactListController *vc = self; if ([segue.identifier isEqualToString:@"add"]) { AddContactController *addVC = [segue.destinationViewController viewControllers][0]; // [segue.destinationViewController viewControllers][0]就是得到导航控制器所管理的视图控制器 addVC.AddBlock = ^(Contact *contact) { //方到数组中 [vc.dataSource addObject:contact]; //本地数据持久化，放入本地数据库的表中 [vc insertIntoDataBaseWithContact:contact]; //刷新数据，界面就要重新读出页面的内容 [vc.tableView reloadData]; }; } else { // ContactDetailController *detailVC = [[ContactDetailController alloc] init]; ContactDetailController * detailVc = segue.destinationViewController; NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];//sender 此时是选中的cell //属性传值 detailVc.contact = self.dataSource[indexPath.row]; //设置代理对象_03 detailVc.delegate = self; } } //实现协议_05 -(void)updateDataWithContact:(Contact *)contact{ //执行更新操作 跟新数据库表里的信息 [self updateFromDataBaseWithContact:contact]; NSLog(@"//执行更新操作 跟新数据库表里的信息"); //刷新数据 [self.tableView reloadData]; } //更新一条数据 - (void)updateFromDataBaseWithContact:(Contact *)contact{ //1.打开数据库 BOOL isOpen = [self.database open]; if (!isOpen) { return; } NSData * data = UIImagePNGRepresentation(contact.photoImage); //2.执行SQL语句操作数据库 BOOL isSuccess =[self.database executeUpdate:@"update Contacts set con_name = ?, con_gender = ?,con_age = ?,con_phoneNum = ?,con_image = ? where con_id = ?",contact.name,contact.gender,@(contact.age),contact.phoneNum,data,@(contact.con_id)];//注意把 age 转化为对象 if (isSuccess) { NSLog(@"%@",isSuccess ? @"更新成功":@"更新失败"); }else{ NSLog(@"失败"); } //3.关闭数据库 [self.database close]; } /* 数据库操作类 数据库查询类 数据库在多线程下的操作类 使用 FMDB FMDatabase :1.创建数据库，我们只需要提供一个数据库路径 2.创建表 3.用数据库对象去执行相应的操作 executeUpdate（只能操作对象） executeQure 操作有，创建表，增删改查 1）.打开数据库 2）.通过给定的SQL语句操作数据库 3）.关闭数据库 */ @end
#pragma mark (.h文件)-------------------------------------------------------------------------------------------------------- #import <UIKit/UIKit.h> #import "Contact.h" //指定代理协议_01 @protocol updateDelegate <NSObject> -(void)updateDataWithContact:(Contact *)contact; @end //下面属性是从 storyBoard 里面关联的属性 @interface ContactDetailController : UIViewController @property (retain, nonatomic) IBOutlet UITextField *nameTf; @property (retain, nonatomic) IBOutlet UITextField *genderLabel; @property (retain, nonatomic) IBOutlet UITextField *phonelabel; @property (retain, nonatomic) IBOutlet UIImageView *phontoView; //定义代理属性_02 注意这里不写 copy 要写 assign Block 中需要为 Copy @property(nonatomic,assign)id<updateDelegate>delegate; //定义属性 接收首页传来的model @property (nonatomic, retain) Contact *contact; @end #pragma mark (.m文件)-------------------------------------------------------------------------------------------------------- #import "ContactDetailController.h" @interface ContactDetailController () @end @implementation ContactDetailController - (void)viewDidLoad { [super viewDidLoad]; self.navigationItem.rightBarButtonItem = self.editButtonItem; self.view.userInteractionEnabled = NO; self.nameTf.text = self.contact.name; self.phonelabel.text = self.contact.phoneNum; self.phontoView.image = self.contact.photoImage; } -(void)setEditing:(BOOL)editing animated:(BOOL)animated{ [super setEditing:editing animated:animated]; self.view.userInteractionEnabled = editing;//根据参数去确定用户是否可以操作控件的编辑 if (!editing) { //将修改后的联系人返回到上一界面 // NSString * name = self.nameTf.text; // NSString * gender = self.genderLabel.text; // NSString * phoneNum = self.phonelabel.text; // UIImage * image = self.phontoView.image; // Contact * per = [[Contact alloc]initWithId:self.contact.con_id name:name gender:gender age:10 phoneNum:phoneNum photoImage:image];//这是新建的一个 //优化 self.contact.name = self.nameTf.text; self.contact.gender = self.genderLabel.text; self.contact.phoneNum = self.phonelabel.text; self.contact.photoImage =self.phontoView.image; //传回到上一界面_06 if (self.delegate && [self.delegate respondsToSelector:@selector(updateDataWithContact:)]) { // [self.delegate updateDataWithContact:per]; [self.delegate updateDataWithContact:self.contact]; }else{ NSLog(@"错误的"); } } } - (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. } */ - (void)dealloc { [_nameTf release]; [_genderLabel release]; [_phonelabel release]; [_phontoView release]; [super dealloc]; } @end
#pragma mark (.h文件)-------------------------------------------------------------------------------------------------------- #import <UIKit/UIKit.h> @class Contact; @interface AddContactController : UIViewController @property (nonatomic, copy) void(^AddBlock)(Contact *); @end #pragma mark (.m文件)-------------------------------------------------------------------------------------------------------- // // AddContactController.m #import "AddContactController.h" #import "Contact.h" @interface AddContactController () @property (retain, nonatomic) IBOutlet UIImageView *photoImageView; @property (retain, nonatomic) IBOutlet UITextField *nameTF; @property (retain, nonatomic) IBOutlet UITextField *genderTF; @property (retain, nonatomic) IBOutlet UITextField *phoneTF; @end @implementation AddContactController - (void)viewDidLoad { [super viewDidLoad]; } - (IBAction)handleCancel:(id)sender { if (![self.nameTF.text isEqualToString:@""] || ![self.phoneTF.text isEqualToString:@""]) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"确定放弃保存吗" delegate:self cancelButtonTitle:@"不" otherButtonTitles:@"确定", nil]; [alert show]; [alert release]; //其他操作 }else if ([self.nameTF.text isEqualToString:@""] && [self.phoneTF.text isEqualToString:@""]) { NSLog(@"返回返回"); [self.navigationController dismissViewControllerAnimated:YES completion:nil]; } } - (IBAction)handelDone:(id)sender { NSString *name = self.nameTF.text; NSString *gender = self.genderTF.text; NSString *phone = self.phoneTF.text; Contact *contact = [[Contact alloc] initWithId:0 name:name gender:gender age:12 phoneNum:phone photoImage:nil]; //传到上一界面 self.AddBlock(contact); /* if ([self.nameTF.text isEqualToString:@""] && [self.phoneTF.text isEqualToString:@""]) { [self dismissViewControllerAnimated:YES completion:^{ }]; } */ [self dismissViewControllerAnimated:YES completion:nil]; } - (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. } */ - (void)dealloc { [_photoImageView release]; [_nameTF release]; [_genderTF release]; [_phoneTF release]; [super dealloc]; } @end
#pragma mark (.h文件)-------------------------------------------------------------------------------------------------------- #import <Foundation/Foundation.h> #import <UIKit/UIKit.h> @interface Contact : NSObject @property (nonatomic, assign) NSInteger con_id; @property (nonatomic, copy) NSString *name; @property (nonatomic, copy) NSString *gender; @property (nonatomic, assign) NSInteger age; @property (nonatomic, copy) NSString *phoneNum; @property (nonatomic, retain) UIImage *photoImage; //初始化方法 - (instancetype)initWithId:(NSInteger)ID name:(NSString *)name gender:(NSString *)gender age:(NSInteger )age phoneNum:(NSString *)phoneNum photoImage:(UIImage *)photoImage; @end #pragma mark (.m文件)-------------------------------------------------------------------------------------------------------- #import "Contact.h" @implementation Contact - (instancetype)initWithId:(NSInteger)ID name:(NSString *)name gender:(NSString *)gender age:(NSInteger)age phoneNum:(NSString *)phoneNum photoImage:(UIImage *)photoImage { self = [super init]; if (self) { self.con_id = ID; self.name = name; self.gender = gender; self.age = age; self.phoneNum = phoneNum; self.photoImage = photoImage; } return self; } - (void)dealloc { self.name = nil; self.gender = nil; self.phoneNum = nil; self.photoImage = nil; [super dealloc]; } @end
#pragma mark (.h文件)-------------------------------------------------------------------------------------------------------- #import <UIKit/UIKit.h> @interface ContactListCell : UITableViewCell @property (retain, nonatomic) IBOutlet UIImageView *photoImage; @property (retain, nonatomic) IBOutlet UILabel *nameLabel; @property (retain, nonatomic) IBOutlet UILabel *phoneNumLabel; @end #pragma mark (.m文件)-------------------------------------------------------------------------------------------------------- #import "ContactListCell.h" @implementation ContactListCell - (void)awakeFromNib { // Initialization code } - (void)setSelected:(BOOL)selected animated:(BOOL)animated { [super setSelected:selected animated:animated]; // Configure the view for the selected state } - (void)dealloc { [_photoImage release]; [_nameLabel release]; [_phoneNumLabel release]; [super dealloc]; } @end
#pragma mark (.h文件)-------------------------------------------------------------------------------------------------------- #import <Foundation/Foundation.h> #import <sqlite3.h> /** * 该类是数据库管理类。提供两个功能： 1.打开数据库 2.关闭数据库 导入libsqlite3.0.dylib动态链接库，然后导入sqlite3.h头文件 */ @interface DataBaseManager : NSObject //打开数据库 + (sqlite3 *)openDataBase; //关闭数据库 + (void)closeDataBase; @end #pragma mark (.m文件)-------------------------------------------------------------------------------------------------------- #import "DataBaseManager.h" static sqlite3 *db = nil;//存储数据库对象 @implementation DataBaseManager //打开数据库 + (sqlite3 *)openDataBase { //优化 对于数据库操作，我们只打开一次数据库就可以了。 //如果sqlite对象不为空，说明之前打开过，直接返回数据库地址就可以了。 if (db) { return db; } //1.获取数据库文件的路径 NSString *filePath = [self getFilePath]; //2.打开数据库 sqlite3_open([filePath UTF8String], &db); return db; } //关闭数据库 + (void)closeDataBase { if (db) { sqlite3_close(db); db = nil; } } + (NSString *)getFilePath { //1.获取Documents文件夹路径 NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]; NSLog(@"%@", path); //2.拼接上数据文件的路径 NSString *dataPath = [path stringByAppendingPathComponent:@"DB.sqlite"]; return dataPath; } @end
#pragma mark (.h文件)-------------------------------------------------------------------------------------------------------- #import <Foundation/Foundation.h> #import <sqlite3.h> @class Contact; /** * 数据库的操作类 对数据库进行创建表，插入，删除，更新，查询操作，从数据库获取数据，处理数据 */ @interface DataBaseHelper : NSObject //单例方法 + (DataBaseHelper *)defaultDBHelper; + (void)createTableInDataBase;//创建表的操作 + (void)selectFromDataBase; //查询数据的操作 + (void)insertIntoDataBaseWithContact:(Contact *)contact; //插入一条数据的操作 + (void)updateFromDataBaseWithContact:(Contact *)contact; //更新一条数据的操作 + (void)deleteFromDataBaseWithContact:(Contact *)contact; //删除一条数据的操作 //获取唯一的标识 + (NSInteger)getNumber; //提供相应的方法给对应的controller @end //添加分类 用于创建指令集 @interface DataBaseHelper (CreateStatement) + (sqlite3_stmt *)createTableStatement; + (sqlite3_stmt *)insertStatement; + (sqlite3_stmt *)updateStatement; + (sqlite3_stmt *)selectStatement; + (sqlite3_stmt *)deleteStatement; /* 1.打开数据库 2.创建指令集 3.创建SQL语句 4.语法检查 */ @end #pragma mark (.m文件)-------------------------------------------------------------------------------------------------------- #import "DataBaseHelper.h" #import "DataBaseManager.h" #import "Contact.h" /** * 1.打开数据库 2.创建指令集 3.创建SQL语句 4.语法检查 5.获取指令集 (6.如果有参数，需要绑定参数) 7.执行SQL语句 8.释放资源 9.关闭数据库 */ @implementation DataBaseHelper //单例方法 static DataBaseHelper *helper = nil; + (DataBaseHelper *)defaultDBHelper { @synchronized(self) { if (!helper) { helper = [[DataBaseHelper alloc] init]; //程序每次运行，只从数据库里读取一次数据即可 [self createTableInDataBase];//创建表 [self selectFromDataBase];//读取数据 } } return helper; } //创建表的操作 + (void)createTableInDataBase { //5.获取指令集 sqlite3_stmt *stmt = [self createTableStatement]; //6.如果有参数，需要绑定参数 //7.执行SQL语句 执行数据库操作 if (sqlite3_step(stmt) == SQLITE_DONE) { NSLog(@"创建表成功"); } //8.释放资源 sqlite3_finalize(stmt); //9.关闭数据库 [DataBaseManager closeDataBase]; } + (void)selectFromDataBase { } //插入 + (void)insertIntoDataBaseWithContact:(Contact *)contact { //5.获取指令集 sqlite3_stmt *stmt = [self insertStatement]; //(6.如果有参数，需要绑定参数) //第一个：指令集； 第二个：第几个问号； 第三个：绑定的数据 sqlite3_bind_int(stmt, 1, (int)contact.con_id); //第一个：指令集； 第二个：第几个问号； 第三个：绑定的数据； 第四个：是否限制长度 第五个：预留参数 sqlite3_bind_text(stmt, 2, [contact.name UTF8String], -1, nil); sqlite3_bind_text(stmt, 3, [contact.gender UTF8String], -1, nil); sqlite3_bind_int(stmt, 4, (int)contact.age); sqlite3_bind_text(stmt, 5, [contact.phoneNum UTF8String], -1, nil); NSData *data = UIImagePNGRepresentation(contact.photoImage); //绑定二进制数据 sqlite3_bind_blob(stmt, 6, data.bytes, (int)data.length, nil); //7.执行SQL语句 if (sqlite3_step(stmt) == SQLITE_DONE) { NSLog(@"插入数据成功"); } //8.释放资源 sqlite3_finalize(stmt); //9.关闭数据库 [DataBaseManager closeDataBase]; } + (void)updateFromDataBaseWithContact:(Contact *)contact { //5.获取更新数据指令集 sqlite3_stmt *stmt = [self updateStatement]; //6.绑定参数 01:指令集 02:第几个问号 03:绑定的数据 //01 指令集 02第几个问号 03绑定的数据(C语言) 04是否限制长度 05预留参数 sqlite3_bind_text(stmt, 1, [contact.name UTF8String], -1, nil); sqlite3_bind_text(stmt, 2, [contact.gender UTF8String], -1, nil); sqlite3_bind_int(stmt, 3, (int)contact.age); sqlite3_bind_text(stmt, 4, [contact.phoneNum UTF8String], -1, nil); //绑定二进制数据 NSData *data = UIImagePNGRepresentation(contact.photoImage); sqlite3_bind_blob(stmt, 5, data.bytes, (int)data.length, nil); sqlite3_bind_int(stmt, 6, (int)contact.con_id); //7.执行SQL语句 if (sqlite3_step(stmt) == SQLITE_DONE) { NSLog(@"修改数据成功"); } //8.释放资源 sqlite3_finalize(stmt); //9.关闭数据库 [DataBaseManager closeDataBase]; } + (void)deleteFromDataBaseWithContact:(Contact *)contact { sqlite3_stmt *stmt = [self deleteStatement]; sqlite3_bind_int(stmt, 1, (int)contact.con_id); if (sqlite3_step(stmt) == SQLITE_DONE) { NSLog(@"删除数据成功"); } sqlite3_finalize(stmt); [DataBaseManager closeDataBase]; } //获取唯一的标识 //+ (NSInteger)getNumber { // //} @end //分类的实现部分 @implementation DataBaseHelper (CreateStatement) + (sqlite3_stmt *)createTableStatement { //1.打开数据库 sqlite3 *db = [DataBaseManager openDataBase]; //2.创建指令集 sqlite3_stmt *stmt = nil; //3.创建SQL语句 NSString *creatTable = @"create table if not exists Contact(con_id integer primary key autoincrement, con_name text, con_gender text, con_age integer, con_phoneNum text, con_image blob)"; //4.语法检查 检查数据库是否打开成功，检查SQL语句是否正确 /** * 第一个参数：数据库对象 第二个参数：SQL语句， 第三个参数：是否限制SQL语句的长度 第四个参数：指令集地址 第五个参数：预留参数 */ int flag = sqlite3_prepare_v2(db, [creatTable UTF8String], -1, &stmt, 0); if (flag == SQLITE_OK) { NSLog(@"创建表的指令集成功"); } return stmt;//返回指令集 } + (sqlite3_stmt *)insertStatement { //1.打开数据库 sqlite3 *db = [DataBaseManager openDataBase]; //2.创建指令集 sqlite3_stmt *stmt = nil; //3.创建SQL语句 NSString *insertSQL = @"insert into Contact(con_id, con_name, con_gender, con_age, con_phoneNum, con_image) values(?, ?, ?, ?, ?, ?)"; //4.语法检查 int flag = sqlite3_prepare_v2(db, [insertSQL UTF8String], -1, &stmt, 0); if (flag == SQLITE_OK) { NSLog(@"插入语法正确"); } return stmt; } + (sqlite3_stmt *)updateStatement { sqlite3 *db = [DataBaseManager openDataBase]; NSString *updateSQL = @"update Contact set con_name = ?, con_gender = ?, con_age = ?, con_phone = ?, con_image = ? where con_id = ?"; sqlite3_stmt *stmt = nil; int flag = sqlite3_prepare_v2(db, [updateSQL UTF8String], -1, &stmt, 0); if (SQLITE_OK == flag) { NSLog(@"更新数据成功"); } return stmt; } + (sqlite3_stmt *)selectStatement { sqlite3 *db = [DataBaseManager openDataBase]; NSString *selectSQL = @"select * from Contact"; sqlite3_stmt *stmt = nil; int flag = sqlite3_prepare_v2(db, [selectSQL UTF8String], -1, &stmt, 0); if (SQLITE_OK == flag) { NSLog(@"查询数据成功"); } return stmt; } + (sqlite3_stmt *)deleteStatement { sqlite3 *db = [DataBaseManager openDataBase]; NSString *deleteSQL = @"delete from Contact where con_id = ?"; sqlite3_stmt *stmt = nil; int flag = sqlite3_prepare_v2(db, [deleteSQL UTF8String], -1, &stmt, 0); if (SQLITE_OK == flag) { NSLog(@"删除数据成功"); } return stmt; } @end
数据库更新操作的时候，注意是对对象的更新，如果不是对象，就要转化为对象（因为底层是用C语言写的）。
添加联系人我们用的是 Block传值。
我们使用第三方数据库操作类 FMDB 的步骤：
#import "FMDatabase.h" 数据库操作类
#import "FMResultSet.h" 数据库查询类
#import "FMDatabaseAdditions.h" 数据库其他附加方法
#import "FMDatabaseQueue.h"线程下的数据库操作类
#import "FMDatabasePool.h"数据库在多线程下的操作类
使用 FMDB
FMDatabase :1.创建数据库，我们只需要提供一个数据库路径
2.创建表
3.用数据库对象去执行相应的操作 executeUpdate（只能操作对象） executeQure
操作有，创建表，增删改查
1）.打开数据库
2）.通过给定的SQL语句操作数据库
3）.关闭数据库
一定要掌握下面的操作方法
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*CocoaPods快速引入第三方类：
cd 拖入文件（cd 与文件名中间有空格）
pod init
pod search 需要引入的类
然后再podfile文件中粘贴上类的版本号
pod install --verbose --no-repo-update
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注意：对于属性的属性在定义代理的属性的时候要使用 assign ；在使用Block 的时候要使用Copy