TextField is returning nil when it is empty

Question

I am preparing my app to iOS7 and have a weird problem:

When I am trying to get an empty TextField text I get "nil", while in the past it used to return @"" (empty string).

Is that a formal change or bug ?

Thanks Shani

Answer 1

It is a formal change from iOS6 to iOS7. The text field used to return an empty string, but now you have a nil string instead.

@property (weak, nonatomic) IBOutlet UITextField *tf;

// iOS6
if (![self.tf.text isEqualToString:@""]){

// iOS7    
if (self.tf.text != nil && ![self.tf.text isEqualToString:@""]) {

Answer 2

Another thing which I think you can do is :-

if([self.tf.text length] != 0)
{
// do whatever
}

The above will handle both empty strings as well as nil. Since sending a length message to nil returns 0.

Answer 3

Yes, Its a formal Change. So you need to handle like this

// For iOS 6
if (![self.tf.text isEqualToString:@""])
{
}

// For iOS 7    
if (self.tf.text != nil && [self.tf.text length] != 0)
{
}

or

This condition for both iOS 7 and earlier version.

if([self.tf.text length] != 0)
{
// do your stuff
}