Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I actually needed to do something similar, but instead of moving the images around, I decided instead to do this:</p> <ul> <li>Create three buttons where you want them to appear (predetermined locations).</li> <li>Assign the images to each button randomly (by randomizing a NSMutableArray with the NSStrings of the image names).</li> <li>Instead of assigning @selector(answerCorrect) and @selector(answerUncorrect), assign @selector(checkIfCorrect:)</li> <li>Define checkIfCorrect as such:</li> </ul> <blockquote> <p>-(void)checkIfCorrect:(id)sender{ UIImage *buttonImage = sender.image;</p> <p>if(buttonImage == [UIImage imageNamed:@"kncpf.png"]){ [self answerCorrect]; } else { [self answerIncorrect]; }</p> <p>}</p> </blockquote> <p>EDITED TO INCLUDE THE CODE I RECOMMEND:</p> <p>Also, you are calling</p> <pre><code>int length02 = [arrayPossiblePositions count]; int chosen02 = arc4random() % length02; [arrayPossiblePositions removeObjectAtIndex:chosen02]; int chosen04 = arc4random() % length02; [arrayPossiblePositions removeObjectAtIndex:chosen04]; int chosen05 = arc4random() % length02; </code></pre> <p>Notice that length02 remains the same, while the size of arrayPossiblePositions changes. This is probably the first reason why your code crashes: you are trying to remove an index from an array which is outside of the array count!</p> <p>I have not tested, but should work: (dont forget to define checkanswer() as I mentioned above)</p> <pre><code>NSMutableArray *imagesArray = [NSMutableArray arrayWithObjects:@"image1.png", @"image2.png", @"image3.png", nil]; int count1 = [imagesArray count]; int index1 = arc4random() % count1; button1 = [UIButton buttonWithType:UIButtonTypeCustom]; CGRect newSize = CGRectMake(30, 80, 130, 130); button1.frame = newSize; [button1 setImage:[UIImage imageNamed:[imagesArray objectAtIndex:index1]] forState:UIControlStateNormal]; [button1 addTarget:self action:@selector(checkAnswer:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button1]; [imagesArray removeObjectAtIndex:index1]; int count2 = [imagesArray count]; int index2 = arc4random() % count2; button2 = [UIButton buttonWithType:UIButtonTypeCustom]; CGRect newSize = CGRectMake(160, 80, 130, 130); button2.frame = newSize; [button2 setImage:[UIImage imageNamed:[imagesArray objectAtIndex:index2]] forState:UIControlStateNormal]; [button2 addTarget:self action:@selector(checkAnswer:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button2]; [imagesArray removeObjectAtIndex:index2]; int count3 = [imagesArray count]; int index3 = arc4random() % count3; button3 = [UIButton buttonWithType:UIButtonTypeCustom]; CGRect newSize = CGRectMake(290, 80, 130, 130); button3.frame = newSize; [button3 setImage:[UIImage imageNamed:[imagesArray objectAtIndex:index3]] forState:UIControlStateNormal]; [button3 addTarget:self action:@selector(checkAnswer:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button3]; </code></pre>
    singulars
    1. This table or related slice is empty.
    1. PORandomize object position
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDaniel Amitay
    1. USDaniel Amitay
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PORandomize object position
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COthis sounds great but the problem now is that I created a NSMutableArray with images names, but the random image doesn't show up in the button even if a NSLog confirm that everything is working, and if I add the option to remove the object, the app crashes....this is the code I'm using: http://shorttext.com/0rr3vxr9te what should I do ? Thanks man
      singulars
      1. PO
      1. USDavid Pollak
    2. COCheck my additions: one problem might be that you are removing the object from the array before you create the button image. The NSString *laggo02 = [arrayPosizioniPossibili objectAtIndex:chosen02]; is probably just creating a pointer, as opposed to creating a completely new piece in memory.
      singulars
      1. PO
      1. USDaniel Amitay
    3. CO[button1 setImage:[UIImage imageNamed:[imagesArray objectAtIndex:index1]] forState:UIControlStateNormal]; - this seems not to work fine, maybe because it isn't a NSString, but even if I coded: NSString *stringozzo01 = [immaginiSbagliate objectAtIndex: index1]; and then assign it to the random images, it crashes have you got a suggestion ? Thanks so much for the time and patience man
      singulars
      1. PO
      1. USDavid Pollak
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload