UITextField编辑并添加到数组

Question

Okay so i have a series of UITextFields that have the tags between 21 and 35. I am using the UITextField delegate to get the value of the textfield when its finished editing and then adds it to a mutable array. The code for the delegate method is as follows:

- (void)textFieldDidEndEditing:(UITextField *)textField{

if(textField.tag >=21 && textField.tag <36){
    if(textField.text.length != 0)
    [ingredients addObject:textField.text];
  }
}

So when the the text field has finished editing it adds its value into the mutable array. This all works perfectly fine. However my problem occurs if that text field is edited again, if the user changes the values in that text field it will then add another value into the array, i would like the previous value to be edited rather than creating a new value in the array.

Any help would be appreciated please!

Answer 1

You could change your ingredients object from NSMutableArray to NSMutableDictionary. Example:

- (void)textFieldDidEndEditing:(UITextField *)textField{

    if(textField.tag >=21 && textField.tag <36){
        if(textField.text.length != 0)
            [ingredients setObject:textField.text forKey:[NSNumber numberWithInt:textField.tag]];
    }
}

Answer 2

When you're initialising, add 15 empty strings to your ingredients array. Then when textFieldDidEndEditing: is called, set the string at the appropriate index (textField.tag - 21) instead of using addObject: