Image movement through touch is not working - iphone

Question

I am using two images named "ATrackThumb" & "BTrackThumb" in my iPad application, to be moved by the touch of an user. I am using some methods for this purpose. But image movement is not working.
Methods are:
#pragma mark responding to touch events
- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event{
for (UITouch *touch in touches) {
CGPoint t = [touch locationInView:touch.view];
if(t.x > (ATrackThumb.center.x-25) && t.x < (ATrackThumb.center.x+25) && t.y > (ATrackThumb.center.y-25) && t.y < (ATrackThumb.center.y+25)){
ASliderLastTouch = touch;
}
if(t.x>(BTrackThumb.center.x-25) && t.x < (BTrackThumb.center.x+25) && t.y > (BTrackThumb.center.y-25) && t.y < (BTrackThumb.center.y+25)){
BSliderLastTouch = touch;
}
}
}
- (void)touchesMoved:(NSSet*)touches withEvent:(UIEvent*)event{
for (UITouch *touch in touches) {
CGPoint t = [touch locationInView:touch.view];
//Check Slider for Contact
if(touch==ASliderLastTouch){
if(t.x>205)
[ATrackThumb setCenter:CGPointMake(205,ATrackThumb.center.y)];
else if(t.x<24)
[ATrackThumb setCenter:CGPointMake(24,ATrackThumb.center.y)];
else
[ATrackThumb setCenter:CGPointMake(t.x,ATrackThumb.center.y)];
hourSlider.value=(ATrackThumb.center.x-24)/15;
[self updateHour];
}
if(touch==BSliderLastTouch){
if(t.x>205)
[BTrackThumb setCenter:CGPointMake(205,BTrackThumb.center.y)];
else if(t.x<24)
[BTrackThumb setCenter:CGPointMake(24,BTrackThumb.center.y)];
else
[BTrackThumb setCenter:CGPointMake(t.x,BTrackThumb.center.y)];
minutesSlider.value=(BTrackThumb.center.x-24)/3.0;
[self updateMinute];
}
}
}
- (void)touchesEnded:(NSSet*)touches withEvent:(UIEvent*)event{
for (UITouch *touch in touches) {
if(touch==ASliderLastTouch)ASliderLastTouch=nil;
if(touch==BSliderLastTouch)BSliderLastTouch=nil;
}
}
where is the problem?

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