ऑब्जेक्ट को स्थानांतरित करने के लिए UIPanGestureRecognizer का उपयोग कैसे करें? आईफोन/आईपैड

Question

UIPanGestureRecognizer कक्षा के कई उदाहरण हैं। उदाहरण के लिए मैं this पढ़ लिया है और मैं अभी भी इसका इस्तेमाल करने में सक्षम नहीं हूँ ...

निब फ़ाइल है कि मैं मैं पर काम कर रहा हूँ पर एक UIView (छवि पर सफेद आयत) है कि मुझे लगता है कि वर्ग के साथ खींचें करने के लिए चाहते हैं:

और मेरे .m फ़ाइल में मैं रखा है:

- (void)setTranslation:(CGPoint)translation inView:(UIView *)view 
{ 
    NSLog(@"Test to see if this method gets executed"); 
} 

और कहा कि विधि निष्पादित नहीं प्राप्त करता है जब मैं UIView भर में माउस खींचें। मैंने रखने की भी कोशिश की है:

- (void)pan:(UIPanGestureRecognizer *)gesture 
{ 
    NSLog(@"testing"); 
} 

और वह विधि निष्पादित नहीं होती है। शायद मैं गलत हूं लेकिन मुझे लगता है कि इस विधियों को - (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event विधि की तरह काम करना चाहिए जहां मुझे बस उस विधि को रखना होगा और जब भी स्पर्श हो जाए तो उसे कॉल किया जाएगा।

मैं क्या गलत कर रहा हूं? शायद मुझे उस विधि से कनेक्शन बनाना है? यदि ऐसा है तो मैं यह कैसे कर सकता हूं?

Answer 1

मुझे ट्यूटोरियल Working with UIGestureRecognizers मिला, और मुझे लगता है कि मैं यही देख रहा हूं। यह मेरे निम्नलिखित समाधान के साथ आने में मदद मिली:

-(IBAction) someMethod { 
    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)]; 
    [panRecognizer setMinimumNumberOfTouches:1]; 
    [panRecognizer setMaximumNumberOfTouches:1]; 
    [ViewMain addGestureRecognizer:panRecognizer]; 
    [panRecognizer release]; 
} 

-(void)move:(UIPanGestureRecognizer*)sender { 
    [self.view bringSubviewToFront:sender.view]; 
    CGPoint translatedPoint = [sender translationInView:sender.view.superview]; 

    if (sender.state == UIGestureRecognizerStateBegan) { 
     firstX = sender.view.center.x; 
     firstY = sender.view.center.y; 
    } 


    translatedPoint = CGPointMake(sender.view.center.x+translatedPoint.x, sender.view.center.y+translatedPoint.y); 

    [sender.view setCenter:translatedPoint]; 
    [sender setTranslation:CGPointZero inView:sender.view]; 

    if (sender.state == UIGestureRecognizerStateEnded) { 
     CGFloat velocityX = (0.2*[sender velocityInView:self.view].x); 
     CGFloat velocityY = (0.2*[sender velocityInView:self.view].y); 

     CGFloat finalX = translatedPoint.x + velocityX; 
     CGFloat finalY = translatedPoint.y + velocityY;// translatedPoint.y + (.35*[(UIPanGestureRecognizer*)sender velocityInView:self.view].y); 

     if (finalX < 0) { 
      finalX = 0; 
     } else if (finalX > self.view.frame.size.width) { 
      finalX = self.view.frame.size.width; 
     } 

     if (finalY < 50) { // to avoid status bar 
      finalY = 50; 
     } else if (finalY > self.view.frame.size.height) { 
      finalY = self.view.frame.size.height; 
     } 

     CGFloat animationDuration = (ABS(velocityX)*.0002)+.2; 

     NSLog(@"the duration is: %f", animationDuration); 

     [UIView beginAnimations:nil context:NULL]; 
     [UIView setAnimationDuration:animationDuration]; 
     [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; 
     [UIView setAnimationDelegate:self]; 
     [UIView setAnimationDidStopSelector:@selector(animationDidFinish)]; 
     [[sender view] setCenter:CGPointMake(finalX, finalY)]; 
     [UIView commitAnimations]; 
    } 
} 

Answer 2

UIPanGestureRecognizer * pan1 = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(moveObject:)]; 
pan1.minimumNumberOfTouches = 1; 
[image1 addGestureRecognizer:pan1]; 

-(void)moveObject:(UIPanGestureRecognizer *)pan; 
{ 
image1.center = [pan locationInView:image1.superview]; 
} 

Answer 3

-(IBAction)Method 
{ 
     UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)]; 
     [panRecognizer setMinimumNumberOfTouches:1]; 
     [panRecognizer setMaximumNumberOfTouches:1]; 
     [ViewMain addGestureRecognizer:panRecognizer]; 
     [panRecognizer release]; 
} 
- (Void)handlePan:(UIPanGestureRecognizer *)recognizer 
{ 

    CGPoint translation = [recognizer translationInView:self.view]; 
    recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, 
            recognizer.view.center.y + translation.y); 
    [recognizer setTranslation:CGPointMake(0, 0) inView:self.view]; 

    if (recognizer.state == UIGestureRecognizerStateEnded) { 

     CGPoint velocity = [recognizer velocityInView:self.view]; 
     CGFloat magnitude = sqrtf((velocity.x * velocity.x) + (velocity.y * velocity.y)); 
     CGFloat slideMult = magnitude/200; 
     NSLog(@"magnitude: %f, slideMult: %f", magnitude, slideMult); 

     float slideFactor = 0.1 * slideMult; // Increase for more of a slide 
     CGPoint finalPoint = CGPointMake(recognizer.view.center.x + (velocity.x * slideFactor), 
            recognizer.view.center.y + (velocity.y * slideFactor)); 
     finalPoint.x = MIN(MAX(finalPoint.x, 0), self.view.bounds.size.width); 
     finalPoint.y = MIN(MAX(finalPoint.y, 0), self.view.bounds.size.height); 

     [UIView animateWithDuration:slideFactor*2 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{ 
      recognizer.view.center = finalPoint; 
     } completion:nil]; 

    } 

} 

Answer 4

स्विफ्ट 2 संस्करण:

// start detecting pan gesture 
let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(TTAltimeterDetailViewController.panGestureDetected(_:))) 
panGestureRecognizer.minimumNumberOfTouches = 1 
self.chartOverlayView.addGestureRecognizer(panGestureRecognizer) 

func panGestureDetected(panGestureRecognizer: UIPanGestureRecognizer) { 
    print("pan gesture recognized") 
} 

Answer 5

if ([recognizer state] == UIGestureRecognizerStateChanged)  
{ 
    CGPoint translation1 = [recognizer translationInView:main_view]; 
    img12.center=CGPointMake(img12.center.x+translation1.x, img12.center.y+ translation1.y); 
    [recognizer setTranslation:CGPointMake(0, 0) inView:main_view]; 

    recognizer.view.center=CGPointMake(recognizer.view.center.x+translation1.x, recognizer.view.center.y+ translation1.y); 
} 

-(void)move:(UIPanGestureRecognizer*)recognizer 
{ 
    if ([recognizer state] == UIGestureRecognizerStateChanged)  
    { 
     CGPoint translation = [recognizer translationInView:self.view]; 
     recognizer.view.center=CGPointMake(recognizer.view.center.x+translation.x, recognizer.view.center.y+ translation.y); 
     [recognizer setTranslation:CGPointMake(0, 0) inView:self.view]; 
    } 
} 

Answer 6

तेज 2 @MS AppTech जवाब के संस्करण

func handlePan(panGest : UIPanGestureRecognizer) { 
let velocity : CGPoint = panGest.velocityInView(self.view); 
     let magnitude : CGFloat = CGFloat(sqrtf((Float(velocity.x) * Float(velocity.x)) + (Float(velocity.y) * Float(velocity.y)))); 
     let slideMult :CGFloat = magnitude/200; 
     //NSLog(@"magnitude: %f, slideMult: %f", magnitude, slideMult); 

     let slideFactor : CGFloat = 0.1 * slideMult; // Increase for more of a slide 
     var finalPoint : CGPoint = CGPointMake(panGest.view!.center.x + (velocity.x * slideFactor), 
             panGest.view!.center.y + (velocity.y * slideFactor)); 
     finalPoint.x = min(max(finalPoint.x, 0), self.view.bounds.size.width); 
     finalPoint.y = min(max(finalPoint.y, 0), self.view.bounds.size.height); 

     UIView.animateWithDuration(Double(slideFactor*2), delay: 0, options: UIViewAnimationOptions.CurveEaseOut, animations: { 
      panGest.view!.center = finalPoint; 
      }, completion: nil) 
}