SQLIte3.0
@interface DataManager : NSObject
{
NSString *databasePath;
}
+(DataManager*)getSharedInstance;
- (BOOL) saveData:(NSString*)registerNumber name:(NSString*)name department:(NSString*)department year:(NSString*)year;
-(NSArray*) findByRegisterNumber:(NSString*)registerNumber;
@end
@interface DataManager ()
{
}
@end
static DataManager *sharedManagerObj = nil;
static sqlite3 *database = nil;
static sqlite3_stmt *statement = nil;
@implementation DataManager
-(BOOL)createDataBaseFile{
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: @"student.db"]];
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*)registerNumber name:(NSString*)name department:(NSString*)department year:(NSString*)year;
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSString *insertSQL = [NSString stringWithFormat:@"insert into studentsDetail (regno,name, department, year) values (\"%ld\",\"%@\", \"%@\", \"%@\")",(long)[registerNumber integerValue], name, department, year];
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(database, insert_stmt,-1, &statement, NULL);
if (sqlite3_step(statement) == SQLITE_DONE)
{
return YES;
}
else {
return NO;
}
sqlite3_reset(statement);
}
return NO;
}
- (NSArray*) findByRegisterNumber:(NSString*)registerNumber
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:@"select name, department, year from studentsDetail where regno=\"%@\"",registerNumber];
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 *department = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 1)];
[resultArray addObject:department];
NSString *year = [[NSString alloc]initWithUTF8String:
(const char *) sqlite3_column_text(statement, 2)];
[resultArray addObject:year];
return resultArray;
}
else{
NSLog(@"Not found");
return nil;
}
sqlite3_reset(statement);
}
}
return nil;
}
@end
@interface ViewController : UIViewController
{
__weak IBOutlet UITextField *regsNum;
__weak IBOutlet UITextField *nameStr;
__weak IBOutlet UITextField *depmStr;
__weak IBOutlet UITextField *yearStr;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)saveData:(id)sender {
BOOL success = NO;
NSString *alertString = @"Data Insertion failed";
if (regsNum.text.length>0 &&nameStr.text.length>0 &&
depmStr.text.length>0 &&yearStr.text.length>0 )
{
success = [[DataManager getSharedInstance] saveData:regsNum.text name:nameStr.text department:depmStr.text year:yearStr.text];
}
else{
alertString = @"Enter all fields";
}
if (success == NO) {
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:alertString message:nil delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
}
}
-(IBAction)findData:(id)sender{
NSArray *data = [[DataManager getSharedInstance]findByRegisterNumber:
regsNum.text];
if (data == nil) {
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:
@"Data not found" message:nil delegate:nil cancelButtonTitle:
@"OK" otherButtonTitles:nil];
[alert show];
regsNum.text = @"";
nameStr.text =@"";
depmStr.text = @"";
yearStr.text =@"";
}
else{
regsNum.text = regsNum.text;
nameStr.text =[data objectAtIndex:0];
depmStr.text = [data objectAtIndex:1];
yearStr.text =[data objectAtIndex:2];
}
}
#pragma mark - Text field delegate
-(BOOL) textFieldShouldReturn:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
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