How to call a tagged textfield

Question

I am creating a series of textfields programmatically using tags. I want to be able to access the data in each text field, but it keeps reverting back to the last tag.

In this example I am creating 10 textfields. When you click on a field it should turn that field blue, but it always turns the last field blue.

How do I access the field tags so I can get to the correct textfield?

I added NSlog to test the sender #.

@implementation ViewController
@synthesize name = _name ;
- (void)viewDidLoad
{
    [super viewDidLoad];
    int y = 20 ;
    for(int i=1; i <= 10; i++)
    {
      CGRect frame = CGRectMake(20, y, 100, 30 ) ;
      name = [[UITextField alloc] initWithFrame:frame];
      [name setTag:i] ;
      [name setBackgroundColor:[UIColor whiteColor]] ;
      [name addTarget:self action:@selector(makeBlue:) forControlEvents:UIControlEventTouchDown];
      [self.view addSubview:name];
      y += 38;
    }
}

- (void)makeBlue:(id)sender
{
    int i = (int)[sender tag] ;
    [name setTag:i] ;
    NSLog(@"%d", i);
    [name setBackgroundColor:[UIColor blueColor]] ;
}

EDIT: That is great. Thank you. It certainly solved one of my problems. I guess I was expecting a different answer that would lead me in a direction to solve my second problem. I want to take the input from a tagged textfield to use it elsewhere. I have the same problem that I am only getting the input from the last textfield.

- (void)viewDidLoad
{
[super viewDidLoad];

int y = 20 ;
for(int tag=1; tag <= 10; tag++)
{
    CGRect frame = CGRectMake(20, y, 100, 30 ) ;
    name = [[UITextField alloc] initWithFrame:frame];
    [name setTag:tag] ;
    [name setBackgroundColor:[UIColor whiteColor]] ;
    [name addTarget:self action:@selector(makeItSo:) forControlEvents:UIControlEventEditingDidEnd];
    [self.view addSubview:name];
    [name setDelegate:self] ;
    y += 38;
}
}

- (void)makeItSo:(id)sender
{
int tag = (int)[sender tag] ;
[name setTag:tag] ;
NSString * aName = [name text] ;
NSLog(@"%@", aName) ;
}

In this example I don't need to use setTag again in the makeItSo method, but I don't know how to get the value from a particular tag.

It is the same solution. The trick is to get the reference to the correct view/textfield. After that you can use the usual methods to access the value/change color or do whatever you want. — Rakesh, Mar 22 '13 at 03:15

Rakesh · Accepted Answer · 2013-03-22T03:14:45.817

0

In your makeBlue: method you are just re-assigning a tag for no reason. This doesn't change the view. The variable name will point to the last view created in the loop even if you change its tag. If you want to access the views by tag use :

[self.view viewWithTag:<tag>]

So your makeBlue: code will look like:

- (void)makeBlue:(id)sender
{
    int tag = (int)[sender tag] ;
    UIView *tagView = [self.view viewWithTag:tag]
    [tagView setBackgroundColor:[UIColor blueColor]] ;
}

So for taking the value of a text field you would use:

 name = [self.view viewWithTag:[sender tag]];
 NSString *fieldText = name.text;

edited Mar 22 '13 at 03:14

answered Mar 21 '13 at 12:33

Rakesh

3,370
2
23
41

That is great. Thank you. It certainly solved one of my problems. I guess I was expecting a different answer that would lead me in a direction to solve my second problem. – Brian Slack Mar 21 '13 at 23:15
Thank you, this is a huge help. – Brian Slack Mar 22 '13 at 04:54
Ok, one more question. How can I parse the name of the sender? If I have 10 tags for 'name', and 10 for 'address', etc, how to I test for if the sender is from 'name' or 'address'? If it's a button I call it using [sender currentTitle], but I am using all textfields. – Brian Slack Mar 22 '13 at 18:13

score 0 · Answer 2 · answered Mar 30 '17 at 06:31

0

NSInteger i =    [sender tag];

answered Mar 30 '17 at 06:31

Moktahid Al Faisal

850
9
19

How to call a tagged textfield

2 Answers2