Want Double Tapped Image

Question

I have 100 images which are stored in the array and displayed in single imageview randomly using swipe gesture.

On double tapping I want to store that particular image in NSUserDefault. Can anyone please help me in achieving this.

I tried this

randIdx=arc4random()%[FrontsCards count];

NSString *imageName=[FrontsCards objectAtIndex:randIdx];

NSString *fullImageName=[NSString stringWithFormat:@"%@",imageName];

int padding=0;

CGRect imageViewFrame=CGRectMake(scrollView.frame.size.width*m+padding, scrollView.frame.origin.y, scrollView.frame.size.width-2*padding, scrollView.frame.size.height);

ImgView=[[UIImageView alloc]initWithFrame:imageViewFrame];

[ImgView setImage:[UIImage imageNamed:fullImageName]];

[scrollView addSubview:ImgView];

[ImgView setAccessibilityIdentifier:[FrontsCards objectAtIndex:randIdx]];


[[NSUserDefaults standardUserDefaults]setObject:UIImagePNGRepresentation(@"") forKey:@""];

Thanks in Advance.

check this out http://stackoverflow.com/questions/6587453/filtering-single-and-double-taps — p.balmasov, May 20 '13 at 11:02
What have you tried? Questions must show some research has been carried out and this shows none also your question is doesn't provide much information to what you actually want. — Popeye, May 20 '13 at 11:03
you can set tag to each one image. for example image.tag = rndNumb. rndNumb = 1..100 ? — Bob, May 20 '13 at 11:04

icodebuster · Accepted Answer · 2015-04-21T07:10:59.687

3

In your -viewDidLoad add UITapGestureRecognizer to your image. You need to enable user interaction on the UIImageView which in set to NO by default.

- (void)viewDidLoad {
    [super viewDidLoad];

    [self.imgView setUserInteractionEnabled:YES];

    imgArray = [NSArray arrayWithObjects:@"Default.png", @"Default2.png", @"Default3.png", nil];
    NSInteger randomNumber = arc4random() % [imgArray count];

    UITapGestureRecognizer *doubleTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
    NSString *strImgName = [imgArray objectAtIndex:randomNumber];
    [self.imgView setImage:[UIImage imageNamed:strImgName]];
    NSLog(@"Image Name = %@", strImgName);
    [self.imgView setTag:randomNumber];

    doubleTapGestureRecognizer.numberOfTapsRequired = 2;
    [self.imgView addGestureRecognizer:doubleTapGestureRecognizer];
}

And then add the @selector to handle the double tap as follows:

- (void)handleDoubleTap:(UITapGestureRecognizer *)gesture {
    int imgViewTag = [gesture.view tag];
    NSString *strImageName = [imgArray objectAtIndex:imgViewTag];
    NSLog(@"Selected Image = %@",strImageName);
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:strImageName forKey:@"imageName"];
}

Sample Project Dropbox Link

edited Apr 21 '15 at 07:10

answered May 20 '13 at 11:25

icodebuster

8,890
7
62
65

@Jitendra You need to get the image name from `NSString *fullImageName` variable – icodebuster May 20 '13 at 11:32
how may get the douuble tapped image. – Jitendra May 20 '13 at 11:34
@JitendraDeore set the image tag like this `[ImgView setTag:randIdx];` – icodebuster May 20 '13 at 11:45
@JitendraDeore Please check the sample dropbox link. – icodebuster May 20 '13 at 12:01
@JitendraDeore Did you check the sample project, is it what you want? – icodebuster May 20 '13 at 12:07
i want to fetch randomly genrated doubble tapped image. – Jitendra May 20 '13 at 12:23
@JitendraDeore Thats what I have done. `NSInteger randomNumber = arc4random() % [imgArray count];` in my code create a random number – icodebuster May 20 '13 at 13:48

score 0 · Answer 2 · answered May 20 '13 at 11:13

0

You can add UITapGestureRecognizer to your image in viewDidLoad like this

- (void)viewDidLoad
{

     UITapGestureRecognizer *gestureTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTap:)];
     [myImageView addGestureRecognizer:gestureTap];
     gestureTap.delegate = self;
     gestureTap.numberOfTapsRequired = 2;

     [self.imageView addGestureRecognizer:gestureTap];
}

And then in gesture's action, you can save image to NSUserDefault like this

 -(void)doubleTap2:(UITapGestureRecognizer *)gesture
 {
     [[NSUserDefaults standardUserDefaults] setValue:self.imageView.image forKey:@"imagesaved"];
     [[NSUserDefaults standardUserDefaults] synchronize];
 }

answered May 20 '13 at 11:13

Ajay Chaudhary

1,993
15
23

i want only doubble tapped image out of 100 single doubble tapped image require. – Jitendra May 20 '13 at 11:18
@ajay self.imageView.image wont get you the name of the image. – icodebuster May 20 '13 at 11:26
how to get the image name and how may i display that image ti imageview. – Jitendra May 20 '13 at 11:27
@Jitendra, You can find it in same way as you write in your code above – Ajay Chaudhary May 20 '13 at 11:32
Is FrontsCards a array which contain set of image name? – Ajay Chaudhary May 20 '13 at 11:37
Then what is the problem? You have code in swipe's action in which you select one image randomly so you have to save randIdx and then in gesture's action save image like this: [[NSUserDefaults standardUserDefaults] setValue:[FrontsCards objectAtIndex:randIdx] forKey:@"imagesaved"]; – Ajay Chaudhary May 20 '13 at 11:48

Bob · Answer 3 · 2013-05-20T12:31:29.410

You can may try like this:

Displaying:

  YourMethod {

    randIdx=arc4random()%[FrontsCards count];

    NSString *imageName=[FrontsCards objectAtIndex:randIdx];

    NSString *fullImageName=[NSString stringWithFormat:@"%@",imageName];

    int padding=0;

    CGRect imageViewFrame=CGRectMake(scrollView.frame.size.width*m+padding, scrollView.frame.origin.y, scrollView.frame.size.width-2*padding, scrollView.frame.size.height);

    ImgView=[[UIImageView alloc]initWithFrame:imageViewFrame];

    [ImgView setImage:[UIImage imageNamed:fullImageName]];
    UITapGestureRecognizer *tapped = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tappedAction:)];
    tapped.numberOfTapsRequired = 2;
    [ImgView addGestureRecognizer:tapped];
    [ImgView setTag:randIndx];
    [scrollView addSubview:ImgView];

}

Storing ...

  -(void)tappedAction:(UITapGestureRecognizer*)gesture
  {
   // storing in nsuserdefault ...
    int indArr = [sender.view tag];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
   NSData *imageData = UIImagePNGRepresentation([sender.view image]);
    NSString *thKey = [NSString stringWithFormat:@"%i", indArr];
    [defaults setObject:imageData forKey:theKey];

}

UIImagePNGRepresentation(@"") forKey:@""]; what i pass here. — Jitendra, May 20 '13 at 11:50

Want Double Tapped Image

3 Answers3