Swipe pattern matching in ios

Question

I am trying to make an app that will match a swipe pattern to display a particular image. Currently i am using buttons to display an image on button click. I want to detect a swipe pattern and display images accordingly. Any help in this direction is welcome. Please help

on button click, click event will happen and on that u will need to do some animation kind of thing, but if u want "swipe effect" then u have to add swipe gesture on button. So just want to suggest that remove this from ur mind that u will get swipe effect on button click.. u need to swipe button.. not click on button — Nayan, Jan 20 '14 at 05:54

score 4 · Answer 1 · edited May 23 '17 at 12:11

try this one:

.h file add "UIGestureRecognizerDelegate"

.m file (if you want in self.view)

   //LEFT Swipe
   UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipedLeft:)];
   [swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft ];
   [self.view addGestureRecognizer:swipeLeft];

   //Right Swipe
    UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipedRight:)];
    [swipeRight setDirection:UISwipeGestureRecognizerDirectionRight ];
    [self.view addGestureRecognizer:swipeRight];

    //Down Swipe        
    UISwipeGestureRecognizer *swipeDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeDown:)];
    [swipeDown setDirection:UISwipeGestureRecognizerDirectionDown ];
    [self.view addGestureRecognizer:swipeDown];

    //Up Swipe       
    UISwipeGestureRecognizer *swipeUp = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeUp:)];
    [swipeUp setDirection:UISwipeGestureRecognizerDirectionUp ];
    [self.view addGestureRecognizer:swipeUp];

- (void)swipedRight:(UISwipeGestureRecognizer *)recognizer
{   // Do your stuff while swipedRight
}

- (void)swipedLeft:(UISwipeGestureRecognizer *)recognizer
{   // Do your stuff while swipedLeft
}
- (void)swipeDown:(UISwipeGestureRecognizer *)recognizer
{   // Do your stuff while swipeDown
}
- (void)swipeUp:(UISwipeGestureRecognizer *)recognizer
{   // Do your stuff while swipeUp
}

EDIT:

For circular swipe detect:

check answer given by Sixten Otto from here

also check this thread from here

For angle swipe :

check this link

May it will help you.

happy coding...:)

thanks for the help. but i need to check certain swipe patterns.means if user swipes an L,or a square or a circle. Can i do this?? and depending upon the pattern i have to display certain images — slaveCoder, Jan 20 '14 at 06:25
UISwipeGestureRecognizer gives you only four gesture left,right,up,down.may be you have to use third party library for your requirement and mention question proper way what you want exactly. — Dhaval Bhadania, Jan 20 '14 at 06:30
i want to detect if a user swiped an L,a square etc. can you please suggest any third party libraries i can look at. — slaveCoder, Jan 20 '14 at 06:37
for that check this one: http://stackoverflow.com/questions/1313484/recognizing-patterns-when-drawing-over-the-iphone-screen?rq=1 — Dhaval Bhadania, Jan 20 '14 at 06:39

score 2 · Answer 2 · answered Jan 20 '14 at 05:56

Try this

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc]
                                        initWithTarget:self
                                                action:@selector(swipeAction)];
swipe.direction = UISwipeGestureRecognizerDirectionRight;

[self.view addGestureRecognizer:swipe];


 -(void)swipeAction

{

}

Swipe pattern matching in ios

2 Answers2