Sqlite DataBase(Save And Find)

ViewController.h

#import <UIKit/UIKit.h>
#import <sqlite3.h>

@interface ViewController : UIViewController

@property (strong, nonatomic) IBOutlet UITextField *name;
@property (strong, nonatomic) IBOutlet UITextField *address;
@property (strong, nonatomic) IBOutlet UITextField *phone;
@property (strong, nonatomic) IBOutlet UILabel *status;

- (IBAction)SaveData:(id)sender;
- (IBAction)FindData:(id)sender;



@property (strong, nonatomic) NSString *databasePath;
@property (nonatomic) sqlite3 *contactDB;

@end


ViewController.m

 #import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
   
    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:
                                      @"user.sqlite"]];
   
    NSFileManager *filemgr = [NSFileManager defaultManager];
   
    if ([filemgr fileExistsAtPath: _databasePath ] == NO)
    {
        const char *dbpath = [_databasePath UTF8String];
       
        if (sqlite3_open(dbpath, &_contactDB) == SQLITE_OK)
        {
            char *errMsg;
            const char *sql_stmt =
            "CREATE TABLE IF NOT EXISTS CONTACTS (ID INTEGER , NAME TEXT, ADDRESS TEXT, PHONE TEXT)";
           
            if (sqlite3_exec(_contactDB, sql_stmt, NULL, NULL, &errMsg) != SQLITE_OK)
            {
                _status.text = @"Failed to create table";
            }
            sqlite3_close(_contactDB);
        } else {
            _status.text = @"Failed to open/create database";
        }
    }
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)SaveData:(id)sender {
    sqlite3_stmt    *statement;
    const char *dbpath = [_databasePath UTF8String];
   
    if (sqlite3_open(dbpath, &_contactDB) == SQLITE_OK)
    {
       
        NSString *insertSQL = [NSString stringWithFormat:
                               @"INSERT INTO CONTACTS (name, address, phone) VALUES (\"%@\", \"%@\", \"%@\")",
                               _name.text, _address.text, _phone.text];
       
        const char *insert_stmt = [insertSQL UTF8String];
        sqlite3_prepare_v2(_contactDB, insert_stmt,
                           -1, &statement, NULL);
        if (sqlite3_step(statement) == SQLITE_DONE)
        {
            _status.text = @"Contact added";
            _name.text = @"";
            _address.text = @"";
            _phone.text = @"";
        } else {
            _status.text = @"Failed to add contact";
        }
        sqlite3_finalize(statement);
        sqlite3_close(_contactDB);
    }
}

- (IBAction)FindData:(id)sender {
    const char *dbpath = [_databasePath UTF8String];
    sqlite3_stmt    *statement;
   
    if (sqlite3_open(dbpath, &_contactDB) == SQLITE_OK)
    {
        NSString *querySQL = [NSString stringWithFormat:
                              @"SELECT address, phone FROM contacts WHERE name=\"%@\"",
                              _name.text];
       
        const char *query_stmt = [querySQL UTF8String];
       
        if (sqlite3_prepare_v2(_contactDB,
                               query_stmt, -1, &statement, NULL) == SQLITE_OK)
        {
            if (sqlite3_step(statement) == SQLITE_ROW)
            {
                NSString *addressField = [[NSString alloc]
                                          initWithUTF8String:
                                          (const char *) sqlite3_column_text(
                                                                             statement, 0)];
                _address.text = addressField;
                NSString *phoneField = [[NSString alloc]
                                        initWithUTF8String:(const char *)
                                        sqlite3_column_text(statement, 1)];
                _phone.text = phoneField;
                _status.text = @"Match found";
            } else {
                _status.text = @"Match not found";
                _address.text = @"";
                _phone.text = @"";
            }
            sqlite3_finalize(statement);
        }
        sqlite3_close(_contactDB);
    }
}
@end