how to make login page in iphone using sqlite - iphone

Question

I am trying to create to create login page in iPhone using sqlite.
I need suggestions ,how to create login form with username /password authentication. For successful login - user should navigate to next page like UITableview.Otherwise giving user a error message: login failed. Please help me. I am new to the Programming.

Answer 1

First you create registration page and after this code apply in your login view..
if([uername.text isEqualToString:#""] || [password.text isEqualToString:#""]) {
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:#"Here comes a block." message:#"You missed something, please check your details and try again." delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
}
else
{
//insert data
NSString *query=[NSString stringWithFormat:#"select * from registration_table where username=\"%#\" and password=\"%#\"",uername.text,password.text];
NSLog(#"%#",query);
//select * from registration_tbl where username="d" and password="d"
array=[app.sk lookupAllForSQL:query];
NSLog(#"%#",[array description]);
if (array.count>0)
{
app.currrentid=[[array objectAtIndex:0]objectForKey:#"uid"];
NSLog(#"%#",app.currrentid);
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:#"" message:#"login successful" delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
messageviewcontroller *log = [[messageviewcontroller alloc]initWithNibName:#"messageviewcontroller" bundle:nil];
[self.navigationController pushViewController:log animated:YES];
[log release];
log.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:log animated:YES];
}
else
{
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:#"Here comes a block." message:#"angry" delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
}
uername.text=#"";
password.text=#"";
//push the view
}
i hope this code useful for you.

Answer 2

Create a table for storing username and password
Input the value such that password is encrypted.
Make a login page with Textfield for username and password
On button action collect the username and password from textfield
.
-(IBAction)loginbuttonPressed:(id)sender
{
if (check username is in table == success)
{
//encrypt the password entered compare and check for password is true for the username in table
if(check password is in table= password found success)
{
// Successfully logged in
}
else
{
//alert "Password Incorrect"
}
}
else
{
// Alert "Username not found"
}
}

Answer 3

First of create 1 sample database with User Table with UserName & Password fields.
Then, copy database into application while installing first time.
- (void) copyDatabaseIfNeeded
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
dbPath = [self getDBPath];
BOOL success = [fileManager fileExistsAtPath:dbPath];
if(!success)
{
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"dbSample.sqlite3"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (!success)
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
}
/********* Database Path *********/
- (NSString *) getDBPath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *documentsDir = [paths objectAtIndex:0];
return [documentsDir stringByAppendingPathComponent:#"dbSample.sqlite3"];
}
Then, check on Validate Button Click,
-(IBAction)validateUser:(id)sender
{
if (sqlite3_open([[appDel getDBPath] UTF8String], &dbTest) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:#"SELECT UserName, Password FROM tblUser Where UserName = \"%#\"",[txtUserName text]];
NSLog(#"%#",querySQL);
const char *sql = [querySQL UTF8String];
sqlite3_stmt *searchStatement;
if (sqlite3_prepare_v2(dbTest, sql, -1, &searchStatement, NULL) == SQLITE_OK)
{
if (sqlite3_step(searchStatement) == SQLITE_ROW)
{
infoUserName = [[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(searchStatement, 0)];
infoUserPassword = [[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(searchStatement, 1)];
NSLog(#"User : %#, Password : %#",infoUserName, infoPassword);
}
}
sqlite3_finalize(searchStatement);
}
sqlite3_close(dbTest);
}
May be, it'll help you.
Thanks.

Answer 4

First thing you need to do is add libsqlite3.dylib to your list of frameworks.
As a Second thing you should start reading the SQLite3 documentation, especially the five-minute guide. If you want some reference to understand how to "Save Data to the SQLite Database" and "Extract Data from the SQLite Database" , you can always check the Beautiful Tutorial : An Example SQLite based iPhone Application
Third and Most Importing thing you need to do is : Read Above Links ( Reference to Line in your Question I AM new to the Programming ).
At last, I cans say you : Good Luck !!!