Add a method for "double space for period" shortcut

[mrinm...@gmail.com]

Hello;

how do I add a method for "double space for period" shortcut i.e. https://www.wikihow.com/Enable-the-Double-Tap-Period-Shortcut-on-an-iPhone

It is already enabled and shows on typing in the entry bar but does not reach the recipient in my texting app.

Sample method-

- (void) sendBackSpaceCommand:(NSString *)userID tag:(NSString *)tag backspaceCount:(NSInteger)backspaceCount{

Commands * command = [[Commands alloc] init];

command.action = @"backspace";

command.value = [NSString stringWithFormat:@"%ld", (long)backspaceCount];

command.tag = [tag integerValue];

command.senderID = self.myUserID;

[self sendCommand:command];

}

Where do I add it; models, controllers or the library - any suggestions?