Objective c checking whether text field is empty

Question

Here\'s the code:

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

           


        

Answer 1

Those 'work' in a way. However, I found that the user can just fill in the box with spaces. I found using regular expressions helps (though what I use is for words without spaces) I can't really figure out how to make allow spaces.

NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[ ]" options:NSRegularExpressionCaseInsensitive error:&error];

if (!([[inputField stringValue]isEqualTo:regex])) {
        NSLog(@"Found a match");
// Do stuff in here //
}

Answer 2

The easiest way to do it.

Create new NSString without " " (spaces)

NSString *textWithoutSpaces = [self.textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

Now you have string without spaces. You just have to check is this string empty or not.

if (textWithoutSpaces != 0) {
 /* not empty - do something */
} else {
  /* empty - do something */
}