Restrict user to enter abuse words in text view - ios

Question

I am developing a application where user has to enter only holy words. I want user to be restricted not to enter the abuse or adult word.
I have a big list of adult or abuse words whenever user will enter that word it should delete it automatically.
Any help will be appreciated.

Answer 1

You are probably using UITextField so you should look after forbidden words after text has changed:
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string];
NSRange spaceRange = [newString rangeOfString:#" "];
if (spaceRange.location != NSNotFound) { // it's a new word
newString = [self stringWithoutForbiddenWords:newString];
}
textField.text = newString;
return NO; // we set the textField text manually
}
- (NSString *)stringWithoutForbiddenWords:(NSString *)string {
for (NSString *forbiddenWord in self.forbiddenWords) {
NSRange forbiddenWordRange = [string rangeOfString:forbiddenWord];
if (forbiddenWordRange.location != NSNotFound) {
// remove the forbidden word
string = [string stringByReplacingOccurrencesOfString:forbiddenWord withString:#""];
}
}
return string;
}
Don't forget to set you UITextField delegate.

Answer 2

Its a very simple logic , by the way only "Holy Word" seems very funny I hope you meant non-abusive words.
So to restrict abusive words, first make an Array and store all the abusive words in that.
then in textView shouldChangeTextInRange: check whenever user press " space.
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if([string isEqualToString:#" "])
{
//now iterate the whole string and find whether any word contains any value from your Abusive words Array and replace the word with blank space or *
}