iOS: Scaling UITextView with pinching?

Question

I\'m interested in creating UITextView that is expanding dynamically while typing the text, and scaling as the user pinches the screen(Similar behaviour can be

Answer 1

First of all add UIPinchGestureRecognizer in viewDidLoad method:

UIPinchGestureRecognizer *pinchOnTextfield = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handleTextFieldFontOnAddMusicVc:)];
[self.myTextField addGestureRecognizer:pinchOnTextfield];

then put this method in your viewController to scale textField font:

- (void)handleTextFieldFontOnAddMusicVc:(UIPinchGestureRecognizer *)pinchGestRecognizer {
    if (pinchGestRecognizer.state == UIGestureRecognizerStateEnded || pinchGestRecognizer.state == UIGestureRecognizerStateChanged) {
        CGFloat currentFontSize = self.myTextField.font.pointSize;
        CGFloat newScale = currentFontSize * pinchGestRecognizer.scale;

        if (newScale < 20.0) {
            newScale = 20.0;
        }
        if (newScale > 60.0) {
            newScale = 60.0;
        }

        self.myTextField.font = [UIFont fontWithName:self.myTextField.font.fontName size:newScale];
        pinchGestRecognizer.scale = 1;

    }    
}