#import <Foundation/Foundation.h>
#import "Persistence03Note.h"
#import "sqlite3.h"
#define DBFILE_NAME @"Persistence03NotesList.sqlite3"
@interface Persistence03NoteDAO : NSObject
{
sqlite3 *db;
}
+ (Persistence03NoteDAO*)sharedManager;
- (NSString *)applicationDocumentsDirectoryFile;
- (void)createEditableCopyOfDatabaseIfNeeded;
//插入Persistence03Note方法
-(int) create:(Persistence03Note*)model;
//删除Persistence03Note方法
-(int) remove:(Persistence03Note*)model;
//修改Persistence03Note方法
-(int) modify:(Persistence03Note*)model;
//查询所有数据方法
-(NSMutableArray*) findAll;
//按照主键查询数据方法
-(Persistence03Note*) findById:(Persistence03Note*)model;
@end
#import "Persistence03NoteDAO.h"
@implementation Persistence03NoteDAO
static Persistence03NoteDAO *sharedManager = nil;
+ (Persistence03NoteDAO*)sharedManager
{
static dispatch_once_t once;
dispatch_once(&once, ^{
sharedManager = [[self alloc] init];
[sharedManager createEditableCopyOfDatabaseIfNeeded];
});
return sharedManager;
}
- (void)createEditableCopyOfDatabaseIfNeeded {
NSString *writableDBPath = [self applicationDocumentsDirectoryFile];
if (sqlite3_open([writableDBPath UTF8String], &db) != SQLITE_OK) {
sqlite3_close(db);
NSAssert(NO,@"数据库打开失败。");
} else {
char *err;
NSString *createSQL = [NSString stringWithFormat:@"CREATE TABLE IF NOT EXISTS Persistence03Note (cdate TEXT PRIMARY KEY, content TEXT);"];
if (sqlite3_exec(db,[createSQL UTF8String],NULL,NULL,&err) != SQLITE_OK) {
sqlite3_close(db);
NSAssert1(NO, @"建表失败, %s", err);
}
sqlite3_close(db);
}
}
- (NSString *)applicationDocumentsDirectoryFile {
NSString *documentDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *path = [documentDirectory stringByAppendingPathComponent:DBFILE_NAME];
return path;
}
//插入Persistence03Note方法
-(int) create:(Persistence03Note*)model
{
NSString *path = [self applicationDocumentsDirectoryFile];
if (sqlite3_open([path UTF8String], &db) != SQLITE_OK) {
sqlite3_close(db);
NSAssert(NO,@"数据库打开失败。");
} else {
NSString *sqlStr = @"INSERT OR REPLACE INTO Persistence03Note (cdate, content) VALUES (?,?)";
sqlite3_stmt *statement;
//预处理过程
if (sqlite3_prepare_v2(db, [sqlStr UTF8String], -1, &statement, NULL) == SQLITE_OK) {
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString *nsdate = [dateFormatter stringFromDate:model.date];
//绑定参数开始
sqlite3_bind_text(statement, 1, [nsdate UTF8String], -1, NULL);
sqlite3_bind_text(statement, 2, [model.content UTF8String], -1, NULL);
//执行插入
if (sqlite3_step(statement) != SQLITE_DONE) {
NSAssert(NO, @"插入数据失败。");
}
}
sqlite3_finalize(statement);
sqlite3_close(db);
}
return 0;
}
//删除Persistence03Note方法
-(int) remove:(Persistence03Note*)model
{
NSString *path = [self applicationDocumentsDirectoryFile];
if (sqlite3_open([path UTF8String], &db) != SQLITE_OK) {
sqlite3_close(db);
NSAssert(NO,@"数据库打开失败。");
} else {
NSString *sqlStr = @"DELETE from Persistence03Note where cdate =?";
sqlite3_stmt *statement;
//预处理过程
if (sqlite3_prepare_v2(db, [sqlStr UTF8String], -1, &statement, NULL) == SQLITE_OK) {
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString *nsdate = [dateFormatter stringFromDate:model.date];
//绑定参数开始
sqlite3_bind_text(statement, 1, [nsdate UTF8String], -1, NULL);
//执行
if (sqlite3_step(statement) != SQLITE_DONE) {
NSAssert(NO, @"删除数据失败。");
}
}
sqlite3_finalize(statement);
sqlite3_close(db);
}
return 0;
}
//修改Persistence03Note方法
-(int) modify:(Persistence03Note*)model
{
NSString *path = [self applicationDocumentsDirectoryFile];
if (sqlite3_open([path UTF8String], &db) != SQLITE_OK) {
sqlite3_close(db);
NSAssert(NO,@"数据库打开失败。");
} else {
NSString *sqlStr = @"UPDATE Persistence03Note set content=? where cdate =?";
sqlite3_stmt *statement;
//预处理过程
if (sqlite3_prepare_v2(db, [sqlStr UTF8String], -1, &statement, NULL) == SQLITE_OK) {
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString *nsdate = [dateFormatter stringFromDate:model.date];
//绑定参数开始
sqlite3_bind_text(statement, 1, [model.content UTF8String], -1, NULL);
sqlite3_bind_text(statement, 2, [nsdate UTF8String], -1, NULL);
//执行
if (sqlite3_step(statement) != SQLITE_DONE) {
NSAssert(NO, @"修改数据失败。");
}
}
sqlite3_finalize(statement);
sqlite3_close(db);
}
return 0;
}
//查询所有数据方法
-(NSMutableArray*) findAll
{
NSString *path = [self applicationDocumentsDirectoryFile];
NSMutableArray *listData = [[NSMutableArray alloc] init];
if (sqlite3_open([path UTF8String], &db) != SQLITE_OK) {
sqlite3_close(db);
NSAssert(NO,@"数据库打开失败。");
} else {
NSString *qsql = @"SELECT cdate,content FROM Persistence03Note";
sqlite3_stmt *statement;
//预处理过程
if (sqlite3_prepare_v2(db, [qsql UTF8String], -1, &statement, NULL) == SQLITE_OK) {
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
//执行
while (sqlite3_step(statement) == SQLITE_ROW) {
char *cdate = (char *) sqlite3_column_text(statement, 0);
NSString *nscdate = [[NSString alloc] initWithUTF8String: cdate];
char *content = (char *) sqlite3_column_text(statement, 1);
NSString * nscontent = [[NSString alloc] initWithUTF8String: content];
Persistence03Note* persistence03Note = [[Persistence03Note alloc] init];
persistence03Note.date = [dateFormatter dateFromString:nscdate];
persistence03Note.content = nscontent;
[listData addObject:persistence03Note];
}
}
sqlite3_finalize(statement);
sqlite3_close(db);
}
return listData;
}
//按照主键查询数据方法
-(Persistence03Note*) findById:(Persistence03Note*)model
{
NSString *path = [self applicationDocumentsDirectoryFile];
if (sqlite3_open([path UTF8String], &db) != SQLITE_OK) {
sqlite3_close(db);
NSAssert(NO,@"数据库打开失败。");
} else {
NSString *qsql = @"SELECT cdate,content FROM Persistence03Note where cdate =?";
sqlite3_stmt *statement;
//预处理过程
if (sqlite3_prepare_v2(db, [qsql UTF8String], -1, &statement, NULL) == SQLITE_OK) {
//准备参数
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString *nsdate = [dateFormatter stringFromDate:model.date];
//绑定参数开始
sqlite3_bind_text(statement, 1, [nsdate UTF8String], -1, NULL);
//执行
if (sqlite3_step(statement) == SQLITE_ROW) {
char *cdate = (char *) sqlite3_column_text(statement, 0);
NSString *nscdate = [[NSString alloc] initWithUTF8String: cdate];
char *content = (char *) sqlite3_column_text(statement, 1);
NSString * nscontent = [[NSString alloc] initWithUTF8String: content];
Persistence03Note* persistence03Note = [[Persistence03Note alloc] init];
persistence03Note.date = [dateFormatter dateFromString:nscdate];
persistence03Note.content = nscontent;
sqlite3_finalize(statement);
sqlite3_close(db);
return persistence03Note;
}
}
sqlite3_finalize(statement);
sqlite3_close(db);
}
return nil;
}
@end
