CODEWITHSUNDEEP
cocoa-touch
Matei
Matei

Reputation: 11

Real time feedback on swipe XCode

I've managed to change views with UISwipeGestureRecognizer but it only starts changing the view after I do the complete swipe. How can I make it start as soon as I start dragging my finger on the screen? I've searched but couldn't find an answer.

Upvotes: 1

Views: 83

Answers (2)

JKallio
JKallio

Reputation: 903

GestureRecognizers will wait until it is certain which gesture was made. This is why they always have a bit of delay. One way of doing this otherwise is to implement your own swipe handler. E.g. You can use touchesBegan: touchesEnded: touchesMoved: and TouchesCancelled: -methods.

(Remember to enable these methods by enabling userInteractionEnabled property for your node(s))

// SKScene init
{
    self.userInteractionEnabled = YES;
}

- (void) touchesBegan:(NSSet*) touches withEvent:(UIEvent*)event
{
     // register that touch(es) began
}

- (void) touchesMoved:(NSSet*) touches withEvent:(UIEvent*)event
{
    // Calculate which way touch(es) is/are moving
}

- (void) touchesEnded:(NSSet*) touches withEvent:(UIEvent*)event
{
    // Register that touch(es) ended
}

Upvotes: -1

CW0007007
CW0007007

Reputation: 5681

Use a Pan gesture 

     UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
     [self addGestureRecognizer:pan];

Then do:

- (void)handlePan:(UIPanGestureRecognizer *)gesture {

    CGPoint touchPoint = [gesture locationInView:YOUR_VIEW];
    UIView *draggedView = [gesture view];

    switch ([gesture state]) {

        case UIGestureRecognizerStateBegan:    
            break;

        case UIGestureRecognizerStatePossible:

            break;

        case UIGestureRecognizerStateChanged:
            break;

        case UIGestureRecognizerStateEnded:
            break;

        case UIGestureRecognizerStateCancelled:
            break;

        case UIGestureRecognizerStateFailed:
            break;

        default: 
            break;
    }
}

Upvotes: 2

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