创建model类 WordNote
WordNote.h中
添加几个属性
//记事本ID
@property (nonatomic, assign) NSInteger WID;
//记事本Title
@property (nonatomic, copy) NSString *title;
//记事本记录的内容
@property (nonatomic, copy) NSString *note;
//记录时间
@property (nonatomic, copy) NSString *time;
//文件夹的ID
@property (nonatomic, assign) NSInteger FID;
创建model类 FileMessage
FileMessage.h中
声明属性
//文件夹title
@property (nonatomic, copy) NSString *title;
//记录时间
@property (nonatomic, copy) NSString *time;
//文件夹的id
@property (nonatomic, assign) NSInteger FID;
创建DataBaseHandle
DataBaseHandle.h中
//引入头文件
#import "WordNote.h"
#import "FileMessage.h"
//添加方法
//数据库单例
+ (DataBaseHandle *)sharedDataBaseHandle;
//打开数据库
- (void)openDB;
//关闭数据库
- (void)closeDB;
//创建记事本表
- (void)createWordNoteTable;
//创建文件夹表
- (void)createfileMessageTable;
//向WOrdNote里面插入一个WordNote类型的model
- (void)insertToWordNoteWith:(WordNote *)model;
//向fileMessage 表里面插入fileMessage类型的model
- (void)insertIntoFileMessageWith:(FileMessage *)model;
//根据WID删除掉wordNote里面的某条数据
- (void)deleteFromWordNoteWithWID:(NSInteger )WID;
//根据FID删掉WordNote里的一堆数据
- (void)deleteFromWordNoteWithFID:(NSInteger)FID;
//根据FID删掉FileMessage里的一条数据
- (void)deleteFromFileMessageWithFID:(NSInteger)FID;
//根据FID在WordNote里面查询数据
- (NSMutableArray *)searchFromWordNoteWithFID:(NSInteger )FID;
//查询FileMessage里面的所有数据
- (NSMutableArray *)searchAllFromFileMessage;
DataBaseHandle.m中
#import<sqlite3.h>
#import@interface DataBaseHandle()
@property (nonatomic, copy) NSString *dbPath;
@end
//设置全局变量,
static DataBaseHandle *dataBase = nil;
/数据库单例
+ (DataBaseHandle *)sharedDataBaseHandle
{
if (dataBase == nil) {
dataBase = [[DataBaseHandle alloc]init];
}
return dataBase;
}
//懒加载
- (NSString *)dbPath
{
if (_dbPath == nil) {
NSString *document = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
_dbPath = [document stringByAppendingPathComponent:@"word.sqlite"];
}
return _dbPath;
}
static sqlite3 *db = nil;
//打开数据库
- (void)openDB
{
int result = sqlite3_open(self.dbPath.UTF8String, &db);
if (result == SQLITE_OK)
{
NSLog(@"打开成功");
}else
{
NSLog(@"打开失败");
}
NSLog(@"databasePath == %@", _dbPath);
}
//关闭数据库
- (void)closeDB
{
int result = sqlite3_close(db);
if (result == SQLITE_OK)
{
NSLog(@"关闭成功");
}else
{
NSLog(@"关闭失败");
}
}
//创建记事本表
- (void)createWordNoteTable
{
NSString *createTable = @"create table WordNote (WID integer primary key autoincrement, title text, note text, time text, FID integer)";
int result = sqlite3_exec(db, createTable.UTF8String, NULL, NULL, NULL);
if (result == SQLITE_OK)
{
NSLog(@"创建记事本表成功");
} else
{
NSLog(@"创建失败 %d", result);
}
}
//创建文件夹表
- (void)createfileMessageTable
{
NSString *creatafile = @"create table if not exists fileMessage (FID integer primary key autoincrement, title text, time text)";
int result = sqlite3_exec(db, creatafile.UTF8String, NULL, NULL, NULL);
if (result == SQLITE_OK)
{
NSLog(@"创建文件夹表成功");
} else
{
NSLog(@"创建失败");
}
}
//向WOrdNote里面插入一个WordNote类型的model
- (void)insertToWordNoteWith:(WordNote *)model
{
//插入流程
//第一步创建sql语句
NSString *insdrtString= @"insert into WordNote (title, note, time, FID) values (?, ?, ?, ?)";
//第二步:创建伴随指针
sqlite3_stmt *stmt = nil;
//第三步:使用sqlite3_prepare方法预执行sql语句
int result = sqlite3_prepare(db, insdrtString.UTF8String, -1, &stmt, NULL);
//第四步: 判断是否预执行成功,如果成功 进行下一步
if (result == SQLITE_OK) {
//第五步:向?的位置插入数据
sqlite3_bind_text(stmt, 1, model.title.UTF8String, -1, NULL);
sqlite3_bind_text(stmt, 2, model.note.UTF8String, -1, NULL);
sqlite3_bind_text(stmt, 3, model.time.UTF8String, -1, NULL);
sqlite3_bind_int64(stmt, 4, model.FID);
//第六步:判断伴随指针是否完成
if (sqlite3_step(stmt) == SQLITE_DONE) {
NSLog(@"插入成功");
}
}
//第七步: 记得释放伴随指针
sqlite3_finalize(stmt);
}
//向fileMessage 表里面插入fileMessage类型的model
- (void)insertIntoFileMessageWith:(FileMessage *)model{
//插入流程
//第一步创建sql语句
NSString *fileMessageString = @"insert into fileMessage ( title, time) values (?, ?)";
//第二步:创建伴随指针
sqlite3_stmt *stmt = nil;
//第三步:使用sqlite3_prepare方法预执行sql语句
int result = sqlite3_prepare(db, fileMessageString.UTF8String, -1, &stmt, NULL);
//第四步: 判断是否预执行成功,如果成功 进行下一步
if (result == SQLITE_OK) {
//第五步:向?的位置插入数据
sqlite3_bind_text(stmt, 1, model.title.UTF8String, -1, NULL);
sqlite3_bind_text(stmt, 2, model.time.UTF8String, -1, NULL);
//第六步:判断伴随指针是否完成
if (sqlite3_step(stmt) == SQLITE_DONE) {
NSLog(@"插入成功");
}
}
//第七步: 记得释放伴随指针
sqlite3_finalize(stmt);
}
#pragma mark --删除方法
//根据WID删除掉wordNote里面的某条数据
- (void)deleteFromWordNoteWithWID:(NSInteger )WID
{
//删除流程
//第一步:创建sql语句
NSString *deleteString = [NSString stringWithFormat:@"delete from WordNote where WID = %ld", WID];
//第二步:执行sql语句
int result = sqlite3_exec(db, deleteString.UTF8String, NULL, NULL, NULL);
if (result == SQLITE_OK) {
NSLog(@"删除成功");
} else
{
NSLog(@"删除失败");
}
}
//根据FID删掉WordNote里的一堆数据
- (void)deleteFromWordNoteWithFID:(NSInteger)FID
{
NSString *deleteString = [NSString stringWithFormat:@"delete from WordNote where FID = %ld", FID];
int reslut = sqlite3_exec(db, deleteString.UTF8String, NULL, NULL, NULL);
if (reslut == SQLITE_OK) {
NSLog(@"删除成功");
}else
{
NSLog(@"删除失败");
}
}
//根据FID删掉FileMessage里的一条数据
- (void)deleteFromFileMessageWithFID:(NSInteger)FID
{
NSString *deleteString = [NSString stringWithFormat:@"delete from fileMessage where FID = %ld", FID];
int reslut = sqlite3_exec(db, deleteString.UTF8String, NULL, NULL, NULL);
if (reslut == SQLITE_OK) {
NSLog(@"删除成功");
}else
{
NSLog(@"删除失败");
}
}
//根据FID在WordNote里面查询数据
- (NSMutableArray *)searchFromWordNoteWithFID:(NSInteger )FID
{
//查询步骤
//第一步:创建sql语句
NSString *searchString = @"select * from WordNote where FID = ?";
//第二步:伴随指针
sqlite3_stmt *stmt = nil;
//第三步:让查询语句 预处理
int result = sqlite3_prepare(db, searchString.UTF8String, -1, &stmt, NULL);
NSMutableArray *resultArray = [NSMutableArray array];
//第四步: 判断预处理数据
if (result == SQLITE_OK)
{
//第四点五步:如果查询语句有 ? 需要一部绑定的过程
sqlite3_bind_int64(stmt, 1, FID);
//第五步 循环取值
while (sqlite3_step(stmt) == SQLITE_ROW)
{
WordNote *model = [WordNote new];
model.WID = sqlite3_column_int(stmt, 0);
model.title = [NSString stringWithUTF8String:(const char *)sqlite3_column_text(stmt, 1)];
model.note = [NSString stringWithUTF8String:(const char *)sqlite3_column_text(stmt, 2)];
model.time = [NSString stringWithUTF8String:(const char *)sqlite3_column_text(stmt, 3)];
model.FID = sqlite3_column_int(stmt, 4);
[resultArray addObject:model];
}
}
sqlite3_finalize(stmt);
return resultArray;
}
//查询FileMessage里面的所有数据
- (NSMutableArray *)searchAllFromFileMessage
{
//查询步骤
//第一步:创建sql语句
NSString *searchString = @"select * from fileMessage";
//第二步:伴随指针
sqlite3_stmt *stmt = nil;
//第三步:让查询语句 预处理
int reslut = sqlite3_prepare(db, searchString.UTF8String, -1, &stmt, NULL);
NSMutableArray *searchArray = [NSMutableArray array];
//第四步: 判断预处理数据
if (reslut == SQLITE_OK)
{
//第五步 循环取值
while (sqlite3_step(stmt) == SQLITE_ROW)
{
FileMessage *model = [FileMessage new];
model.FID = sqlite3_column_int(stmt, 0);
model.title = [NSString stringWithUTF8String:(const char *)sqlite3_column_text(stmt, 1)];
model.time = [NSString stringWithUTF8String:(const char *)sqlite3_column_text(stmt, 2)];
[searchArray addObject:model];
}
}
sqlite3_finalize(stmt);
return searchArray;
}
创建MyLongPressGestureRecognizer类
MyLongPressGestureRecognizer.h中
#warning 这是新的类
@interface MyLongPressGestureRecognizer : UILongPressGestureRecognizer
// 因为原始的长按手势没有indexPath属性，所以自定义一个长按类，添加一个indexPath属性
@property (nonatomic, strong) NSIndexPath *indexPath;
@end
