How to Move Pencil Image using UITouch? [closed] - iphone

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Closed 10 years ago.
I want to Move pencil image using UITouch? I want to move pencil and it will write whatever we want.
But I am not able to move and write Pencil image.
Any hints from experts would be very welcome.

Answer 1

Following code is use for move image on your touch
AppDelegate Classes
**// .h File**
#import <UIKit/UIKit.h>
#class UITouchTutorialViewController;
#interface UITouchTutorialAppDelegate : NSObject <UIApplicationDelegate> {
UIWindow *window;
UITouchTutorialViewController *viewController;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet UITouchTutorialViewController *viewController;
#end
//////////////////////////////////////////////////////////////////////////////////
// .m File
#import "UITouchTutorialAppDelegate.h"
#import "UITouchTutorialViewController.h"
#implementation UITouchTutorialAppDelegate
#synthesize window;
#synthesize viewController;
- (void)applicationDidFinishLaunching:(UIApplication *)application {
// Override point for customization after app launch
[window addSubview:viewController.view];
[window makeKeyAndVisible];
}
- (void)dealloc {
[viewController release];
[window release];
[super dealloc];
}
#end
//////////////////////////////////////////////////////////////////////////////
UIViewController Classes
// .h file
#import <UIKit/UIKit.h>
#interface UITouchTutorialViewController : UIViewController {
IBOutlet UIImageView *cloud;
}
#end
// .m File
#import "UITouchTutorialViewController.h"
#implementation UITouchTutorialViewController
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:touch.view];
cloud.center = location;
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[self touchesBegan:touches withEvent:event];
}
/*
// Override initWithNibName:bundle: to load the view using a nib file then perform additional customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Custom initialization
}
return self;
}
*/
/*
// Implement loadView to create a view hierarchy programmatically.
- (void)loadView {
}
*/
/*
// Implement viewDidLoad to do additional setup after loading the view.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
// Release anything that's not essential, such as cached data
}
- (void)dealloc {
[super dealloc];
}
#end

Answer 2

Use these methods:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint currentPoint = [touch locationInView:self];
yourPencilImgView.center = [touch locationInView:self];
}
And
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint currentPoint = [touch locationInView:self];
yourPencilImgView.center = currentPoint;
}

Answer 3

You can use UIPanGestureRecognizer
- (void)onDraggingPencil:(UIPanGestureRecognizer *)panGR {
CGPoint translation = [panGR translationInView:baseView];
if (panGR.state == UIGestureRecognizerStateBegan) {
} else if (panGR.state == UIGestureRecognizerStateChanged) {
CGRect _rect = panGR.view.frame;
_rect.origin.x = dragPoint.x + translation.x;
_rect.origin.y = dragPoint.y + translation.y;
panGR.view.frame = _rect;
} else if (panGR.state == UIGestureRecognizerStateEnded) {
}
}

Answer 4

You can drag and drop an image using below code
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[panRecognizer setDelegate:self];
[imageView_ addGestureRecognizer:panRecognizer];
-(void)move:(id)sender {
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
firstX = [[sender view] center].x;
firstY = [[sender view] center].y;
}
translatedPoint = CGPointMake(firstX+translatedPoint.x, firstY+translatedPoint.y);
[[sender view] setCenter:translatedPoint];
}