change the keyboard layout to emoji

问题:

is it possible to change the keyboard layout to emoji when a UITextField becomes the first responder ? or according to a user action like tapping a UIButton

i know that i can change the keyboard layout to one of these

typedef enum {
UIKeyboardTypeDefault,                // Default type for the current input method.
UIKeyboardTypeASCIICapable,           // Displays a keyboard which can enter ASCII characters, non-ASCII keyboards remain active
UIKeyboardTypeNumbersAndPunctuation,  // Numbers and assorted punctuation.
UIKeyboardTypeURL,                    // A type optimized for URL entry (shows . / .com prominently).
UIKeyboardTypeNumberPad,              // A number pad (0-9). Suitable for PIN entry.
UIKeyboardTypePhonePad,               // A phone pad (1-9, *, 0, #, with letters under the numbers).
UIKeyboardTypeNamePhonePad,           // A type optimized for entering a person's name or phone number.
UIKeyboardTypeEmailAddress,           // A type optimized for multiple email address entry (shows space @ . prominently).

UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable, // Deprecated

} UIKeyboardType;

I am wondering if there's a way to do the same with the emoji layout

回答1:

Create a subclass of UITextField like this:

class EmojiTextField: UITextField {

    override var textInputMode: UITextInputMode? {
        for mode in UITextInputMode.activeInputModes {
            if mode.primaryLanguage == "emoji" {
                return mode
            }
        }
        return nil
    }
}

In IB select this class as the Custom Class in place of UITextField.

This causes the keyboard to select emoji keyboard, if available, when the field becomes first responder. The user can, of course, change the keyboard back to anything else at any time, but at least it gives an initial selection of what you want.