I’m sure you have seen a Twitter client such as Twittelator Pro or Tweetie 2 count down the characters as you type your Tweet. This is done by responding to the Editing Changed action on a UITextField. Today, I will show you how you can implement this functionality in your application as well as show you some other real world examples of responding to this action. Here are a few of the uses that we will discuss:
- Countdown of characters allowed – Used when the user is limited by a certain number of characters
- Word filter – useful in filtering out swear words or other unwanted text
- Live translator – our example will translate english to 1337
Should able to use in user input functions
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@”Enter Name Here” message:@”this gets covered!” delegate:self cancelButtonTitle:@”Dismiss” otherButtonTitles:@”OK!”, nil];
UITextField *myTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0, 60);
[alert setTransform:myTransform];
[myTextField setBackgroundColor:[UIColor whiteColor]];
[alert addSubview:myTextField];
[alert show];
[alert release];
[myTextField release];
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