Objective c checking whether text field is empty

Question

Here's the code:

- (IBAction) charlieImputText:(id)sender {
    //getting value from text field when entered
    charlieImputSelf = [sender stringValue];

    if (charlieImputSelf != @"") {
        (send field if not empty)
    }
}    

This sends it even when the field is empty; therefore, this does not work as I want it to.

Sorry to be so vague... :D

Any ideas?? Elijah

Answer 1

You really need to read the docs. You're asking a lot of questions that would be answered very simply from that.

[textField.text length] > 0 is the way to check if its empty.

Answer 2

Joshua has the right answer in the narrow case, but generally, you can't compare string objects using the == or != operators. You must use -isEqual: or -isEqualToString: This is because charlieImputSelf and @"" are actually pointers to objects. Although the two sequences of characters may be the same, they need not point at the same location in memory.