Insert date to sqlite - iphone

Question

I am making an iphone app in which there is use of database. In this database I am trying to save the date which is selected by using datepicker. But whenever I go to insert query it get crash and the error it shows i.e.
-[__NSDate UTF8String]: message sent to de allocated instance 0x5db1bf0.
I am unable to resolve this error. Please give me some solution to insert the date into the sqlite.
Thankyou very much.
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
if (btntagvalue == 2) {
if (buttonIndex != [actionSheet cancelButtonIndex]) {
selectedDate1 = [pickerView date];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd"];
frmdatestring = [formatter stringFromDate:selectedDate1];
newfromdate = [[NSDate alloc]init];
newfromdate = [[selectedDate1 addTimeInterval:-21600*4]copy];
NSLog(#"newdateis:%#",newfromdate);
fromdate.text = frmdatestring;
NSLog(#"proper date:%#",fromdate.text);
}
}
else if (btntagvalue == 3)
{
if (buttonIndex != [actionSheet cancelButtonIndex]) {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd"];
selectedDate2 = [pickerView1 date];
LastDate = selectedDate2;
todatestring = [formatter stringFromDate:selectedDate2];
todate.text = todatestring;
NSLog(#"proper date:%#",todate.text);
[self counteddays];
}
}
}
-(IBAction)savedetails:(id)sender
{
docname = doctname;
mail = email;
contactnum = contact;
medicname = mediname;
medictype = meditype;
Lastdatecolmn = (NSString*)LastDate;
[self insert1];
NSLog(#"docname:%#",docname);
NSLog(#"mail:%#",mail);
NSLog(#"contactnum:%#",contactnum);
NSLog(#"medicname:%#",medicname);
NSLog(#"medictype:%#",medictype);
for (int i =0; i<=[totaltimewithdate count]-1; i++) {
Dtime = [totaltimewithdate objectAtIndex:i];
[self insert];
}
[self docmedname];
}
-(void)insert
{
sqlite3_stmt *addStmt = nil;
if(addStmt == nil)
{
const char *sql = "insert into medicationdetail(doctorname, emailid, contactno,medicationname, medicationtype, datetime,LastDateColmn ) values (?,?,?,?,?,?,?)";
//NSLog(#"sq; %#", sql);
if(sqlite3_prepare_v2(database, sql , -1, &addStmt, NULL) != SQLITE_OK)
{
NSAssert1(0, #"Error while creating add statement. '%s'", sqlite3_errmsg(database));
}
sqlite3_bind_text(addStmt, 1, [docname UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(addStmt, 2, [mail UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(addStmt, 3, [contactnum UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(addStmt, 4, [medicname UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(addStmt, 5, [medictype UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(addStmt, 6, [Dtime UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(addStmt, 7, [Lastdatecolmn UTF8String], -1, SQLITE_TRANSIENT);
if(SQLITE_DONE != sqlite3_step(addStmt))
{
NSAssert1(0, #"Error while inserting data. '%s'", sqlite3_errmsg(database));
}
}
}

Answer 1

My guess would be that you're trying to create an NSDate attribute, but that you're mistakenly trying to set this as an NSString, e.g. #"01-01-1999".
If you check your "Date And Time Programming Guide" in your Apple Docs, you'll fine examples of how to create dates using date components.
Also have a look on Stack Overflow, where you'll quickly find plenty of examples if you search under "Create NSDate from NSString", e.g.:
get NSDate from NSString