UITextview: Place focus on becomefirstresponder

问题

I have a UITextView which becomes first responder by tapping. The code looks like this.

UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(editTextRecognizerTabbed:)];
recognizer.delegate = self;
recognizer.numberOfTapsRequired = 1;
[self.textViewNotes addGestureRecognizer:recognizer];

- (void) editTextRecognizerTabbed:(UITapGestureRecognizer *) aRecognizer;
{
    self.textViewNotes.dataDetectorTypes = UIDataDetectorTypeNone;
    self.textViewNotes.editable = YES;
    [self.textViewNotes becomeFirstResponder];
}

So when the user taps on the textview, the textview becomes the first-responder and the focus is on the end of the text. I want place the focus on the tapped position in the Text.

Any idea?

来源：https://stackoverflow.com/questions/25175934/uitextview-place-focus-on-becomefirstresponder