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

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.

Answer 1

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.

Answer 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.

Answer 3

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.

Answer 4

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.

Answer 5

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?