UIPanGestureRecognizer scrolling example for iOS

Hi everyone,

Today, I'm giving you the source code of UIPanGestureRecognizer for iPhone.

Follow 2-3 simple steps as given below:

1) Put below code into your .header file of any viewcontroller class.

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIGestureRecognizerDelegate>
{
    IBOutlet UIView *viewOrange;
    IBOutlet UIView *viewBrown;
    IBOutlet UIView *viewPurple;
}
@property(nonatomic,retain) IBOutlet UIView *viewOrange;
@property(nonatomic,retain) IBOutlet UIView *viewBrown;
@property(nonatomic,retain) IBOutlet UIView *viewPurple;

@end

2) Put below code into your .m file of same viewcontroller class.

#import "ViewController.h"

@implementation ViewController
@synthesize viewOrange;
@synthesize viewBrown;
@synthesize viewPurple;

CGPoint translatedPoint;
NSInteger _firstX;
NSInteger _firstY;
NSInteger numberofView;
CGSize viewSize;
float currentView;

BOOL isBegan;


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
  
    numberofView = 3;
    viewSize = CGSizeMake(320.0, 480.0);
   
    viewOrange.frame = CGRectMake(0.0, 0.0, 320.0, 480.0);
    viewPurple.frame = CGRectMake(320.0, 0.0, 320.0, 480.0);
    viewBrown.frame = CGRectMake(640.0, 0.0, 320.0, 480.0);
   
    UISwipeGestureRecognizer *swipegestureRecognizer = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipe:)];
    [swipegestureRecognizer setDelegate:self];
    [self.view addGestureRecognizer:swipegestureRecognizer];
    [swipegestureRecognizer release];

}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


-(IBAction)handleSwipe:(UIPanGestureRecognizer *)sender
{
    translatedPoint = [sender translationInView:self.view];

        if([sender state] == UIGestureRecognizerStateBegan)
        {
            if (self.viewOrange.frame.origin.x >= -((numberofView-1)*viewSize.width) && self.viewOrange.frame.origin.x <= 0.0)
            {
                _firstX = self.viewOrange.frame.origin.x;
                _firstY = self.viewOrange.frame.origin.y;
               
                if (viewOrange.frame.origin.x==0) {
                    currentView=0;
                }else if (viewPurple.frame.origin.x==0) {
                    currentView=1;
                }else if (viewBrown.frame.origin.x==0) {
                    currentView=2;
                }

            }
        }
        else if([sender state] == UIGestureRecognizerStateChanged)
        {
            if ([sender velocityInView:self.view].x >= 600.0)
            {
                if (!isBegan)
                {
                    if (self.viewOrange.frame.origin.x < 0.0)
                    {
                        isBegan = YES;
                        NSLog(@"Velocity Changed.");
                        [UIView beginAnimations:nil context:NULL];
                        [UIView setAnimationDuration:0.2];
                        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                        [viewOrange setFrame:CGRectMake(viewOrange.frame.origin.x + viewOrange.frame.size.width, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                        viewPurple.frame = CGRectMake(viewOrange.frame.origin.x + viewOrange.frame.size.width, 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                        viewBrown.frame = CGRectMake(viewPurple.frame.origin.x + viewPurple.frame.size.width, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                        [UIView commitAnimations];
                    }
                }
            }
            else if ([sender velocityInView:self.view].x <= -600.0)
            {
                if (!isBegan)
                {
                    if (self.viewOrange.frame.origin.x > -((numberofView-1)*viewSize.width))
                    {
                        isBegan = YES;
                        NSLog(@"Velocity Changed.");
                        [UIView beginAnimations:nil context:NULL];
                        [UIView setAnimationDuration:0.2];
                        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                        [viewOrange setFrame:CGRectMake(viewOrange.frame.origin.x - viewOrange.frame.size.width, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                        viewPurple.frame = CGRectMake(viewOrange.frame.origin.x + viewOrange.frame.size.width, 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                        viewBrown.frame = CGRectMake(viewPurple.frame.origin.x + viewPurple.frame.size.width, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                        [UIView commitAnimations];
                    }
                }
            }
            else
            {
                if (self.viewOrange.frame.origin.x >= -((numberofView-1)*viewSize.width) && self.viewOrange.frame.origin.x <= 0.0)
                {
                    NSLog(@"State Changed.");
                    [UIView beginAnimations:nil context:NULL];
                    [UIView setAnimationDuration:0.2];
                    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                    translatedPoint = CGPointMake(_firstX + translatedPoint.x, 0.0);
                    [viewOrange setFrame:CGRectMake(translatedPoint.x, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                    viewPurple.frame = CGRectMake(viewOrange.frame.origin.x + viewOrange.frame.size.width, 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                    viewBrown.frame = CGRectMake(viewPurple.frame.origin.x + viewPurple.frame.size.width, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                    [UIView commitAnimations];
                }
            }
        }
        else if([sender state] == UIGestureRecognizerStateEnded)
        {
            NSLog(@"State Ended On That ");
            if (self.viewOrange.frame.origin.x >= -((numberofView-1)*viewSize.width) && self.viewOrange.frame.origin.x <= 0.0)
            {
                NSLog(@"%f",viewOrange.frame.origin.x);
                NSLog(@"%f",viewPurple.frame.origin.x);
                NSLog(@"%f",viewBrown.frame.origin.x);
                if (currentView==0) {
                    if (viewOrange.frame.origin.x<0 ){
                        if (viewOrange.frame.origin.x<-160) {
                            [UIView beginAnimations:nil context:NULL];
                            [UIView setAnimationDuration:0.2];
                            [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                            [viewOrange setFrame:CGRectMake(-320, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                            viewPurple.frame = CGRectMake(viewOrange.frame.size.width+viewOrange.frame.origin.x , 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                            [UIView commitAnimations];
                        }else{
                           
                            [UIView beginAnimations:nil context:NULL];
                            [UIView setAnimationDuration:0.2];
                            [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                            [viewOrange setFrame:CGRectMake(0.0, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                            viewPurple.frame = CGRectMake(320, 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                            [UIView commitAnimations];
                        }
                    }
                }else if(currentView==1){
                    if (viewPurple.frame.origin.x<0){
                        if (viewPurple.frame.origin.x<-160) {
                           
                            [UIView beginAnimations:nil context:NULL];
                            [UIView setAnimationDuration:0.2];
                            [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                            [viewOrange setFrame:CGRectMake(-640, 0.0, viewOrange.frame.size.width,  viewOrange.frame.size.height)];
                            viewPurple.frame = CGRectMake(-320 , 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                            viewBrown.frame = CGRectMake(0.0, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                            [UIView commitAnimations];
                           
                          

                        }else {
                            [UIView beginAnimations:nil context:NULL];
                            [UIView setAnimationDuration:0.2];
                            [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                            [viewOrange setFrame:CGRectMake(-320.0, 0.0, viewOrange.frame.size.width,  viewOrange.frame.size.height)];
                            viewPurple.frame = CGRectMake(0.0 , 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                            viewBrown.frame = CGRectMake(320.0, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                            [UIView commitAnimations];
                        }
                    }else{
                         if (viewPurple.frame.origin.x>160) {
                             [UIView beginAnimations:nil context:NULL];
                             [UIView setAnimationDuration:0.2];
                             [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                             [viewOrange setFrame:CGRectMake(0.0, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                             viewPurple.frame = CGRectMake(320 , 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                             viewBrown.frame = CGRectMake(640.0, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                             [UIView commitAnimations];

                         }else{
                            
                             [UIView beginAnimations:nil context:NULL];
                             [UIView setAnimationDuration:0.2];
                             [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                             [viewOrange setFrame:CGRectMake(-320.0, 0.0, viewOrange.frame.size.width,  viewOrange.frame.size.height)];
                             viewPurple.frame = CGRectMake(0.0 , 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                             viewBrown.frame = CGRectMake(320.0, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                             [UIView commitAnimations];
                            
                        }
                    }
                }else if(currentView==2){
                    if (viewBrown.frame.origin.x>0){
                       
                        if (viewBrown.frame.origin.x>160) {
                            [UIView beginAnimations:nil context:NULL];
                            [UIView setAnimationDuration:0.2];
                            [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                            [viewOrange setFrame:CGRectMake(-320.0, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                            viewPurple.frame = CGRectMake(0.0 , 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                            viewBrown.frame = CGRectMake(320.0, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                            [UIView commitAnimations];
                        }else{
                            [UIView beginAnimations:nil context:NULL];
                            [UIView setAnimationDuration:0.2];
                            [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                            [viewOrange setFrame:CGRectMake(-640, 0.0, viewOrange.frame.size.width,  viewOrange.frame.size.height)];
                            viewPurple.frame = CGRectMake(-320 , 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                            viewBrown.frame = CGRectMake(0.0, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                            [UIView commitAnimations];
                           
                        }
                      
                    }
                }
            }
            isBegan = NO;
            if (self.viewOrange.frame.origin.x <-((numberofView-1)*viewSize.width))
            {
                NSLog(@"State Changed.");
                [UIView beginAnimations:nil context:NULL];
                [UIView setAnimationDuration:0.2];
                [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                [viewOrange setFrame:CGRectMake(-640.0, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                viewPurple.frame = CGRectMake(viewOrange.frame.origin.x + viewOrange.frame.size.width, 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                viewBrown.frame = CGRectMake(viewPurple.frame.origin.x + viewPurple.frame.size.width, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                [UIView commitAnimations];
            }
            else if (self.viewOrange.frame.origin.x > 0)
            {
                NSLog(@"State Changed.");
                [UIView beginAnimations:nil context:NULL];
                [UIView setAnimationDuration:0.2];
                [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
                [viewOrange setFrame:CGRectMake(0.0, 0.0, viewOrange.frame.size.width, viewOrange.frame.size.height)];
                viewPurple.frame = CGRectMake(viewOrange.frame.origin.x + viewOrange.frame.size.width, 0.0, viewPurple.frame.size.width, viewPurple.frame.size.height);
                viewBrown.frame = CGRectMake(viewPurple.frame.origin.x + viewPurple.frame.size.width, 0.0, viewBrown.frame.size.width, viewBrown.frame.size.height);
                [UIView commitAnimations];
            }
        }
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    return YES;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}


@end

 Thanks,
Nilesh Prajapati

how to detect link in UIWebview?

Hi friends,
Again I'm here to share something new with you.. If you want to do some operations on URL click in UIWebview of iPhone/iPod/iPad then you need to use the below delegate method of UIWebview. You have to set WebViewDelegate in header file of your class.


#pragma mark-------------------------
#pragma mark WebView Delegate Method

- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType
{
    NSURL *url = request.URL;
    NSString *urlString = url.relativeString;
    NSLog(@"%@",urlString);
    NSLog(@"%@",[request.URL lastPathComponent]);
    if (navigationType == UIWebViewNavigationTypeLinkClicked)
    {
        if([[urlString substringToIndex:5] isEqualToString:@"https"] || [[urlString substringToIndex:5] isEqualToString:@"http:"])
        {
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString: urlString]];
        }
        else
        {
               // do your operation within Application
        }
        return NO;
    }
    return YES;
}

Hope you like this..

Thanks ,
Nilesh Prajapati