Gesture recognizer with Voice Over active

Question

I developed an application which allows to the user to draw his finger signature in a canvas. This feature is implemented using UIPanGestureRecognizer with a specific target action to draw a line in a UIView, but when the “Voice Over” is active the gesture recognizer action is not triggered anymore.

Gesture initialize code

UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
pan.maximumNumberOfTouches = pan.minimumNumberOfTouches = 1;
[self addGestureRecognizer:pan];

Gesture action code

- (void)pan:(UIPanGestureRecognizer *)pan {
    CGPoint currentPoint = [pan locationInView:self];
    CGPoint midPoint = midpoint(previousPoint, currentPoint);

    if (pan.state == UIGestureRecognizerStateBegan)
    {
        [path moveToPoint:currentPoint];
    }
    else if (pan.state == UIGestureRecognizerStateChanged)
    {
        [path addQuadCurveToPoint:midPoint controlPoint:previousPoint];
    }

    previousPoint = currentPoint;

    [self setNeedsDisplay];
}

Is there any way to draw a line in a view using gesture with “Voice Over” active?

Thanks and regards!

Check the answer at stackoverflow.com/questions/33709260/… — spassas

Paolo Termine Paolo Termine · Accepted Answer · 2016-09-14T13:39:23

I resolved my problem setting both isAccessibilityElement and accessibilityTraits properties for UIView canvas:

canvasView.isAccessibilityElement = YES;
canvasView.accessibilityTraits = UIAccessibilityTraitAllowsDirectInteraction;

Gesture recognizer with Voice Over active

1 Answers