Question

I’m just starting with Objective C and xcode. I’ve been exploring NSUserdefaults.

I can save my text field’s input to the plist file. Nad can retrive it to a label when the application launches again.

What I can’t do is get an alternative text to show IF the plist key is empty. Using the code below my label is just empty until I add text back to the plist via the text field. Any pointers please?

- (void)viewWillAppear:(BOOL)animated; 
{
    NSUserDefaults *ud=[NSUserDefaults standardUserDefaults];
    NSString *theNewString=[ud objectForKey:@"textFieldKey"];
    // update the label
    if (theNewString) {
        [mylabel setText:theNewString];
    } else {
        [mylabel setText:@"nothing stored"];
    }
}

Answer 1

Handling the case of a nil string or a valid string of length 0 (empty):

if (theNewString.length > 0) {
    [mylabel setText:theNewString];
} else {
    [mylabel setText:@"nothing stored"];
}