Read and write in to sqlite database in iOS application
//-----add two framework in your project---
1. libsqlite3.dylib
2. libsqlite3.0.dylib
DBManager.h
#import <Foundation/Foundation.h>
#import <sqlite3.h>
@interface DBManager : NSObject
{
NSString *databasePath;
}
+(DBManager*)getSharedInstance;
-(BOOL)createDB;
- (BOOL) saveData:(NSString*)ID name:(NSString*)Name address:(NSString*)Address phone:(NSString*)Phone;
- (NSArray*) findByRegisterNumber:(NSString*)ID;
@end
DBManager.m
#import "DBManager.h"
static DBManager *sharedInstance = nil;
static sqlite3 *database = nil;
static sqlite3_stmt *statement = nil;
@implementation DBManager
+(DBManager *)getSharedInstance
{
if (!sharedInstance) {
sharedInstance = [[DBManager alloc]init]; //[[super allocWithZone:NULL]init];
[sharedInstance createDB];
}
return sharedInstance;
}
-(BOOL)createDB
{
NSString *docsDir;
NSArray *dirPaths;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = dirPaths[0];
// Build the path to the database file
databasePath = [[NSString alloc] initWithString:
[docsDir stringByAppendingPathComponent: @"Contacts.sqlite"]];
BOOL isSuccess = YES;
NSFileManager *filemgr = [NSFileManager defaultManager];
if ([filemgr fileExistsAtPath: databasePath ] == NO)
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
//char *errMsg;
//const char *sql_stmt = @"";
// "create table if not exists studentsDetail (regno integer
// primary key, name text, department text, year text)";
// if (sqlite3_exec(database, sql_stmt, NULL, NULL, &errMsg)!= SQLITE_OK)
// {
// isSuccess = NO;
// NSLog(@"Failed to create table");
// }
// sqlite3_close(database);
return isSuccess;
}
else {
isSuccess = NO;
NSLog(@"Failed to open/create database");
}
}
return isSuccess;
}
- (BOOL) saveData:(NSString*)ID
name:(NSString*)Name address:(NSString*)Address phone:(NSString*)Phone
{
sqlite3_stmt *statement = nil;
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
//NSString *insertSQL = [NSString stringWithFormat:@"insert into Records (id,name, address, phone) values (\"%@\",\"%@\", \"%@\", \"%@\")",ID, Name, Address, Phone];
NSString *insertSQL = [NSString stringWithFormat:@"insert into Records (id,name, address, phone) values ('%@','%@', '%@', '%@');",ID, Name, Address, Phone];
const char *insert_stmt = [insertSQL UTF8String];
//sqlite3_prepare_v2(database, insert_stmt,-1, &statement, NULL);
//if (sqlite3_step(statement) == SQLITE_DONE)
if (sqlite3_prepare_v2(database, insert_stmt,-1, &statement, NULL) == SQLITE_DONE)
{
return YES;
}
else {
return NO;
}
sqlite3_reset(statement);
sqlite3_finalize(statement);
}
return NO;
}
- (NSArray*) findByRegisterNumber:(NSString*)ID
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:@"select name, address, phone FROM Records where id=\"%@\"",ID];
const char *query_stmt = [querySQL UTF8String];
NSMutableArray *resultArray = [[NSMutableArray alloc]init];
if (sqlite3_prepare_v2(database,query_stmt, -1, &statement, NULL) ==SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *name = [[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)];
[resultArray addObject:name];
NSString *address = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 1)];
[resultArray addObject:address];
NSString *phone = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)];
[resultArray addObject:phone];
return resultArray;
}
else{
NSLog(@"Not found");
return nil;
}
sqlite3_reset(statement);
}
}
return nil;
}
@end
Then go to your view controller.m and call these methods
//-----to save data in database--------
[[DBManager getSharedInstance]saveData:txtFID.text name:txtFName.text address:txtFAddress.text phone:txtFPhone.text];
//------to get data from data base------------
[[DBManager getSharedInstance]findByRegisterNumber:txtFID.text];
