Reading an already made sqlite file on ios - ios

Question

I have an already made .sqlite file, I can use the mozilla plugin and see all the fields and edit/add etc. I want to read this file into an iphone application. How do I approach reading the file and saving each entry into a new NSObject?
All I can find on stackoverflow when I search for this question is people saying to use the mozilla plugin but not actually talk about the objective-c side of things.
Thanks in advance,
Oli

Answer 1

To achieve this , you'll need a class that creates the database by copying the database from your project resource to the actual directory that app use.
So, create a Objective C class called DataController like this. In DataController.h do like this
#import <Foundation/Foundation.h>
#import <sqlite3.h>
#interface DataController : NSObject
{
sqlite3 *databaseHandler ;
}
-(void)initDatabase;
-(NSArray*)getBooks;
-(NSString*)getChapter:(NSString*) bible:(NSString*) book:(NSString*) chapter;
#end
In it's implementation do like this. Assume, your database is bible.sqlite . What it basically do is , it checks the document directory that if the database exists , if not it copies your already created database from your project resource to actual directory. Here's the codes.
#import "DataController.h"
#import <sqlite3.h>
#implementation DataController
-(void)initDatabase
{
// Create a string containing the full path to the sqlite.db inside the documents folder
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *databasePath = [documentsDirectory stringByAppendingPathComponent:#"Bibles.sqlite"];
// Check to see if the database file already exists
bool databaseAlreadyExists = [[NSFileManager defaultManager] fileExistsAtPath:databasePath];
// Open the database and store the handle as a data member
if (sqlite3_open([databasePath UTF8String], &databaseHandler) == SQLITE_OK)
{
// Create the database if it doesn't yet exists in the file system
if (!databaseAlreadyExists)
{
NSLog(#"Database doesn't Exists");
BOOL success = NO ;
NSFileManager *filemngr = [NSFileManager defaultManager];
NSError *error;
NSString *defaultDbPath = [[[NSBundle mainBundle] resourcePath]stringByAppendingPathComponent:#"Bibles.sqlite"];
NSLog(#"Size : %lld" , [[[NSFileManager defaultManager] attributesOfItemAtPath:defaultDbPath error:nil] fileSize]);
[filemngr removeItemAtPath:databasePath error:&error];
success = [filemngr copyItemAtPath:defaultDbPath toPath:databasePath error:&error];
if (!success){
NSLog(#"Error : %#" , [error localizedDescription]);
} else{
NSLog(#"Copy Successful");
NSLog(#"Size : %lld" , [[[NSFileManager defaultManager] attributesOfItemAtPath:databasePath error:nil] fileSize]);
}
} else{
NSLog(#"Database already Exists of Size : %lld" , [[[NSFileManager defaultManager] attributesOfItemAtPath:databasePath error:nil] fileSize]);
}
}
}
- (void)dealloc {
sqlite3_close(databaseHandler);
}
-(NSArray*)getBooks
{
NSMutableArray *Books = [[NSMutableArray alloc]init];
NSString *queryStatement = [NSString stringWithFormat:#"SELECT Name FROM Book ORDER BY ID"];
sqlite3_stmt *statement;
if (sqlite3_prepare_v2(databaseHandler, [queryStatement UTF8String], -1, &statement, NULL) == SQLITE_OK)
{
while (sqlite3_step(statement) == SQLITE_ROW) {
NSString *bookName = [NSString stringWithUTF8String:(char*)sqlite3_column_text(statement, 0)];
[Books addObject:bookName];
NSLog(#"Book : %#" , bookName);
}
sqlite3_finalize(statement);
} else{
NSLog(#"Error : %s",sqlite3_errmsg(databaseHandler));
}
return Books ;
}
-(NSString*)getChapter:(NSString*) bible:(NSString*) book:(NSString*) chapter{
NSString *verse = [[NSString alloc]init];
NSString *queryStatement = [NSString stringWithFormat:#"SELECT Text FROM %# WHERE BookID = %# AND Chapter = %#" , bible , book , chapter];
sqlite3_stmt *statement;
if (sqlite3_prepare_v2(databaseHandler, [queryStatement UTF8String], -1, &statement, NULL) == SQLITE_OK)
{
while (sqlite3_step(statement) == SQLITE_ROW) {
NSString *temp = [NSString stringWithUTF8String:(char*)sqlite3_column_text(statement, 0)];
verse = [[NSString alloc]initWithFormat:#"%#\n\n%#",verse ,temp];
// NSLog(#"Book : %#" , verse);
}
sqlite3_finalize(statement);
}
return verse ;
}
#end
Ok...I have created 2 methods for you to show how to use it.
Firstly , in Appdelegate.m , you have to init the database by doing this
DataController *c = [[DataController alloc]init];
[c initDatabase];
Now , let's use it. It's very simple. Just take an instance of DataController and call the method that runs SQL within the database like the last 2 methods I have written. Hope it solves your problem.

Answer 2

I had the same issue a couple of months ago, I found the solution in youtube.
You have to copy your sqlite file to your bundle, import all the link libraries then write some small pieces of code mainly.
Here's a video, you don't need to watch it all, its kinda long.
https://www.youtube.com/watch?v=SVMorX_2Ymk
If you just need the codes let me know ;D