problem when creating UITextField programmatically iphone

Question

I'm struggling when i try to create 11 text fields programmatically. The problem is that the text fields doesn't show up. I'm creating them in the viewDidLoad method.

Here's the code i'm using:

- (void)viewDidLoad
{
    // Determine some basic info
    int numberOfTextfields = 11;
    int textfieldHeight = 40;
    int textfieldWidth = 200;


    // Create the UIScrollView
    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, numberOfTextfields*textfieldHeight,textfieldWidth)];


    // Create all the textfields
    NSMutableArray *textfields = [NSMutableArray arrayWithCapacity:
                                  (NSUInteger)numberOfTextfields];
    for(int i = 0; i < numberOfTextfields; i++) {
        UITextField *field = [[UITextField alloc] initWithFrame:
                              CGRectMake(0,i*textfieldHeight,textfieldHeight,textfieldWidth)];

        [scrollView addSubview:field];
        [textfields addObject:field];
    }

    [super viewDidLoad];

}

Any clues on why they don't show up?

Thanks in advance.

Where do you put the scrollview itself?

Mikayil Abdullayev
– Mikayil Abdullayev

2011-06-16 12:07:23 +00:00
Commented Jun 16, 2011 at 12:07 — Mikayil Abdullayev
– Mikayil Abdullayev, Commented Jun 16, 2011 at 12:07

sudo rm -rf · Accepted Answer · 2011-06-16 12:17:27Z

5

You seem to never add scrollView as a subview.

Your textFields were atually hidden because you never set the border style. Try this:

- (void)viewDidLoad
{
    // Determine some basic info
    int numberOfTextfields = 11;
    int textfieldHeight = 40;
    int textfieldWidth = 200;


    // Create the UIScrollView
    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, textfieldWidth,numberOfTextfields*textfieldHeight)];
    scrollView.contentSize = CGSizeMake(numberOfTextfields*textfieldWidth, textfieldHeight);

    // Create all the textfields
    NSMutableArray *textfields = [NSMutableArray arrayWithCapacity:
                                  (NSUInteger)numberOfTextfields];
    for(int i = 0; i < numberOfTextfields; i++) {
        UITextField *field = [[UITextField alloc] initWithFrame:CGRectMake(0,i*textfieldHeight,textfieldWidth,textfieldHeight)];
        field.borderStyle = UITextBorderStyleRoundedRect;
        [scrollView addSubview:field];
        [textfields addObject:field];
    }

    [self.view addSubview:scrollView];

    [super viewDidLoad];
}

edited Jun 16, 2011 at 12:17

answered Jun 16, 2011 at 12:00

sudo rm -rf

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4 Comments

madcoderz Over a year ago

i tried [self.view addSubview:scrollView]; but it didn't work that's why i removed it from the code.

madcoderz Over a year ago

border style... ok thanks. One question: how can i separate the textfields from eachother?

sudo rm -rf Over a year ago

Just add some padding. When you create your UITextField, do this:

UITextField *field = [[UITextField alloc] initWithFrame:CGRectMake(0, i*textfieldHeight+10, textfieldWidth, textfieldHeight)];

. Be sure to increase the contentSize of the scroll view appropriately.

madcoderz Over a year ago

that's exactly what i tried and it didn't work, i only got padding before the first field not in between them. i guess i will make a new question about this when i give up searching

jv42 · Accepted Answer · 2011-06-16 12:04:48Z

0

You need to add your UIScrollView to your view and to setup its content area, as it doesn't manage it automagically (as you might have expected).

answered Jun 16, 2011 at 12:04

jv42

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Comments

Tatvamasi · Accepted Answer · 2011-06-16 12:09:44Z

0

you need to add your scroll view to your view controller. if it is allocated,
else do this self.view = [[UIView alloc] initWithFrame:CGRectMake (0,0,320,460)] add this line at the end [self.view addSubview: scrollView]

answered Jun 16, 2011 at 12:09

Tatvamasi

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Comments

iAmitWagh · Accepted Answer · 2011-06-16 12:14:33Z

Check this code.....frame parameters are(x,y,width,height)

    int numberOfTextfields = 11;
    int textfieldHeight = 40;
    int textfieldWidth = 200;


    // Create the UIScrollView
    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0,textfieldWidth,numberOfTextfields*textfieldHeight)];


    // Create all the textfields
    NSMutableArray *textfields = [NSMutableArray arrayWithCapacity:
                                  (NSUInteger)numberOfTextfields];
    for(int i = 0; i < numberOfTextfields; i++) {
        UITextField *field = [[UITextField alloc] initWithFrame:
                              CGRectMake(0,i*textfieldHeight,textfieldWidth,textfieldHeight)];
        field.borderStyle=UITextBorderStyleRoundedRect;
        [scrollView addSubview:field];
        [textfields addObject:field];
    }
    [self.view addSubview:scrollView];
    [super viewDidLoad];

Adarsh V C · Accepted Answer · 2011-06-16 12:40:56Z

Try the below code. Textfields are added and you can scroll the textview.

int numberOfTextfields = 11;
int textfieldHeight = 40;
int textfieldWidth = 200;

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0,textfieldWidth,numberOfTextfields*textfieldHeight)];
    scrollView.contentSize = CGSizeMake(textfieldWidth, numberOfTextfields*textfieldWidth+10);

NSMutableArray *textfields = [NSMutableArray arrayWithCapacity:
                                  (NSUInteger)numberOfTextfields];

for(int i = 1; i < numberOfTextfields; i++) 
{
        UITextField *field = [[UITextField alloc] initWithFrame:
                              CGRectMake(0,i*textfieldHeight,textfieldWidth,textfieldHeight)];
        field.borderStyle=UITextBorderStyleRoundedRect;
        [scrollView addSubview:field];
        [textfields addObject:field];
 }

[self.view addSubview:scrollView];
[super viewDidLoad];

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