[NSMutableArray insertObject:atIndex:]: attempt to insert nil object at 0'

Question

i am creating custom cell.

In that i added 3 textfields. so i want to store that textfield values into nsmutablearray.

when i am trying this code

UITextField *valueField = [[UITextField alloc] initWithFrame:CGRectMake(165,6, 135, 30)];
valueField.borderStyle =  UITextBorderStyleRoundedRect;
[cell addSubview:valueField];
[array1 addObject:valueField.text];
[valueField release];

i am getting error like this

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSMutableArray insertObject:atIndex:]: attempt to insert nil object at 0'

so please tell me the reason thanks in advance.

array1 is object of nsmutablearray. and declared as like NSMutableArray *array1; — Thukaram
– Thukaram, Commented Aug 10, 2011 at 6:18
Why do you want to add the text of a newly created textfield when you know that there is nothing inside it... — Robin
– Robin, Commented Aug 10, 2011 at 6:37

Raj · Accepted Answer · 2011-08-10 06:32:42Z

2

UITextField *valueField = [[UITextField alloc] initWithFrame:CGRectMake(165,6, 135, 30)];
valueField.borderStyle =  UITextBorderStyleRoundedRect;
valueField.text = @"";
[cell addSubview:valueField];
[array1 addObject:valueField.text];
[valueField release];

the above code will work fine for you.

answered Aug 10, 2011 at 6:32

Raj

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5 Comments

Thukaram Over a year ago

hi rajesh this code is working fine. can please tell me how i can chat with you

Thukaram Over a year ago

i could not understand what r saying

Thukaram Over a year ago

can u please tell me. textfield values cannot store in array what is the problem

Raj Over a year ago

@Ram before you store values to array , you need to set the textField text ,eg: valueField.text = @"hai"; then try add the value to array, you can do it.

Raj Over a year ago

@Ram you can accept this answer helpful by clicking the tick button to green

Perception · Accepted Answer · 2011-08-10 06:20:57Z

2

The text attribute of UITextField is nil by default. Set it to an empty string before adding it to your array, though I think this is not what you are trying to achieve.

answered Aug 10, 2011 at 6:20

Perception

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Comments

Bushra Shahid · Accepted Answer · 2011-08-10 06:38:16Z

2

Just add this condition to check if the textfield is empty (i.e. textfield.text = nil):

if (valueField.text != nil) {
     [array1 addObject:valueField.text];
}
else {
     [array1 addObject:@""];
}

This will check if textfield is empty it will add an empty string. If you dont want that just skip the else part.

edited Aug 10, 2011 at 6:38

answered Aug 10, 2011 at 6:19

Bushra Shahid

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5 Comments

Thukaram Over a year ago

can u please tell me. textfield values cannot store in array what is the problem

Bushra Shahid Over a year ago

you should store these values on this delegate callback textFieldDidEndEditing:

Thukaram Over a year ago

when i am insert your code into delegate method it is showing only last field value

Bushra Shahid Over a year ago

Please study about the delegate callbacks in the documentation and post a new question explaining what you want

Thukaram Over a year ago

@xs2bush let us continue this discussion in chat

Zhang · Accepted Answer · 2011-08-10 06:42:44Z

1

I noticed you said you declared your array like so:

" declared as like NSMutableArray *array1;"

Have you alloc your array before adding objects to it?

In other words have you done this ?

NSMutableArray *array1 = [[NSMutableArray alloc] init];

If you only did

NSMutableArray *array1;

That will only declare a pointer to a NSMutableArray object. It doesn't point to an instance of a NSMutableArray object.

answered Aug 10, 2011 at 6:42

Zhang

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Comments

Praveen S · Accepted Answer · 2011-08-10 06:23:03Z

0

When you put [array1 addObject:valueField.text];, you are adding a nil object to your array, just as your error says. How can valueField.text be equal to something when you just initialized and allocated valueField?

edited Aug 10, 2011 at 6:23

Praveen S

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answered Aug 10, 2011 at 6:19

Dylan Reich

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