Touches Sample in iPhone SDK

Touches

.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIAlertViewDelegate,UIActionSheetDelegate>

{

  

}

-(IBAction)cleanAll:(id)sender;

@end

.m

#import "ViewController.h"

@implementation ViewController

-(IBAction)cleanAll:(id)sender;

{

    NSArray *subViewsArray = [self.view subviews];

    for (int i=0; i<[subViewsArray count]; i++)

    {

        UIView *vi = [subViewsArray objectAtIndex:i];

        if(![vi isKindOfClass:[UIButton class]])

           [vi removeFromSuperview];

    }

}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    NSLog(@"touchesBegan called");

   

    UITouch *touch = [touches  anyObject];

    CGPoint pnt = [touch locationInView:self.view];

    NSLog(@"touch point is (%0.0f,%0.0f)",pnt.x,pnt.y);

    

    UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(pnt.x, pnt.y, 3, 3)];

    [lbl setBackgroundColor:[UIColor redColor]];

    [self.view addSubview:lbl];

}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

{

      NSLog(@"touchesMoved called");

    UITouch *touch = [touches  anyObject];

    CGPoint pnt = [touch locationInView:self.view];

    NSLog(@"touch point is (%0.0f,%0.0f)",pnt.x,pnt.y);

    

    UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(pnt.x, pnt.y, 3, 3)];

    [lbl setBackgroundColor:[UIColor redColor]];

    [self.view addSubview:lbl];

}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

{

   NSLog(@"touchesEnded called");

}

@end