Cannot get text from UITextField - ios

Question

After had many research, I don't find solution.So that I decided post my question. I have an ** IBOutlet UITextField *txtUsername at DetailViewController.h. At FormViewController I have a UIScrollview, and then I add [self.scrollView addSubview:DetailView.view]. The problem is when stand at DetailViewController.m I call txtUsername.text it return a nil value. Any suggestion?

Answer 1

It seems that you are trying to embed one view controller within another. I recommend using a Container view and then loading DetailViewController into that. Simply adding the view, as you are in your code, is not going to be enough. You probably want all the behavior in DetailViewController to work.

Answer 2

After debug many time I found the problem is:
At FormViewController I have method:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = #"Add new user";
DetailView = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
}
return self;
}
And method (Which had call at viewDidLoad)
-(void) loadViewBySegment {
[DetailView.view removeFromSuperview];
[self.scrollView addSubview:DetailView.view];
}
and ViewDidLoad:
- (void)viewDidLoad
{
[super viewDidLoad];
UIBarButtonItem *saveButton = [[UIBarButtonItem alloc] initWithTitle:#"Save" style:UIBarButtonItemStylePlain target:self action:#selector(save)];
self.navigationItem.rightBarButtonItem = saveButton;
if(user)
{
userDetailView.user = user;
}
[self loadViewBySegment];
// Do any additional setup after loading the view from its nib.
}
and
-(void)save{
[[userDetailView userDetailInstance] insertData];
}
And then at DetailViewController I create insertData function
-(void)insertData{
User *object = [[User alloc] init];
object.Username = txtUsername.text;
object.FullName = txtFullname.text;
object.Title = txtTitle.text;
object.Role = [NSNumber numberWithInt:[txtRole.text intValue]];
object.UserInitial =txtInital.text;
object.Status = YES;
object.AddedTime = [NSDate date];
object.UpdatedTime = [NSDate date];
object.Phone = #"0949931124";
object.Password = #"123456";
[[DBManager sharedInstant] insertData:BUsers item:[object dictionary] target:self];
}
The reason why texfield.text is nil:
At FormViewController I call an instance of DetailViewController it's mean DetailViewController - will be have new alloc init. so that textfield's value will which had enter by user before will be reset.
The right way I need to do is: change the save function at FormViewController:
-(void)save{
[DetailView insertData];
}
P/S:Lesson Learn for me is: be careful when use Instace (Singleton Design partner).