Personally I would think less of the memory usage here and more on code-maintainability. To me, It makes sense that a label always has a string. In the future someone might try to append a labels value, save it in a database, wrap it in xml, etc. An empty NSString in this case makes much … Read more
You need to get the phone number from your database first (convert them to String), then you set placeholder of your textField to that String, like so textField.placeholder = phoneNumberString
NSString * proposedNewString = [[textField text] stringByReplacingCharactersInRange:range withString:replacementString];
I had the exact same issue and it was because I forgot to set the delegate for the text field in interface builder to ‘files owner’.
Found the only solution for this problem. textField.textContentType = .oneTimeCode Otherwise iOS 12 uses PasswordAutofill for any secure field (textField.isSecureTextEntry = true). This solution is from apple developer forum Yuri Petukhov’ answer.
In addition to the other answers here (which essentially confirm there’s no major difference, no auto-resigning of the first responder by returning YES, etc.), I’ve discovered a strange occurrence completely dependent on the return value, specifically for a UITextField with autocorrection. Assume the following scenario: You have a UITextField with autocorrection enabled You’ve implemented the … Read more