Databases
StackOverflow2013
Postsdbo
POHow do you set up an UIImageView to point to another UIImageView
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow do you set up an UIImageView to point to another UIImageView
    primarykey
    data
    text
    <p>I want to have a pointer to an UIImage view so that I don't have to repeat a lot of my code. I need to choose the image based on which button it is but then at the end I apply the same code to whatever digit. <code>oneDigit</code>, <code>twoDigit</code>, and <code>threeDigit</code> are all <code>@property(nonatomic, retain)</code> in the header file. I want imageView to be able to point to one of these UIImageViews. Right now the UIImageViews are not being removed with <code>removeFromSuperview</code> because <code>imageView</code> is not pointing to the objects but creating its own object..</p> <p>Currently when a button is pressed a Image is added. I want the previous image removed and the new image drawn according to what button was pressed. The code works how I want if I replace imageView with oneDigit, but that would require me to add more code for each variable.</p> <p>See simplified example below:</p> <pre><code>- (void)viewDidLoad { ... UIImageView *oneDigit; UIImageView *twoDigit; UIImageView *threeDigit; } -(IBAction)pressButton:(id)sender { UIImage *image; UIImageView *imageView; UIButton *btn = (UIButton*)sender; int value = [btn.titleLabel.text intValue]; switch (value) { case 10: case 15: case 20: [twoDigit removeFromSuperview]; //Remove old image from screen imageView = twoDigit; //Update imageView pointer for current case image = [UIImage imageNamed:@"twoDigit.png"]; break; case 1: case 2: case 3: case 4: case 5: [oneDigit removeFromSuperview]; imageView = oneDigit; image = [UIImage imageNamed:@"oneDigit.png"]; break; case 100: case 200: case 300: [threeDigit removeFromSuperview]; imageView = threeDigit; image = [UIImage imageNamed:@"threeDigit.png"]; break; default: break; } CGPoint point = btn.frame.origin; CGFloat xposition = point.x - ((image.size.width - btn.frame.size.width) /2); CGFloat yposition = point.y - ((image.size.height - btn.frame.size.height) /2); imageView = [ [ UIImageView alloc ] initWithFrame:CGRectMake(xposition, yposition, image.size.width, image.size.height) ]; imageView.image = image; imageView.contentMode = UIViewContentModeCenter; [self.view addSubview:imageView]; } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USmichaellindahl
    1. USmichaellindahl
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COYou "want to have a pointer to an UIImageView", and your code contains a pointer to a UIImageView. What's the actual question? What don't you like about the code?
      singulars
      1. POHow do you set up an UIImageView to point to another UIImageView
      1. USrob mayoff
    2. COWhen and where are you assigning values to `oneDigit`, `twoDigit` and `threeDigit`? In each of your case statements you send the `removeFromSuperView` message to these, and then assign them to the `imageView`. Then you create a new `UIImageView` and assign it to `imageView`. Surely whatever you have initialised `oneDigit`, etc to is then lost?
      singulars
      1. POHow do you set up an UIImageView to point to another UIImageView
      1. USMaurice Kelly
    3. COUpdated question. I want imageView to point to oneDigit so that the code at the end of the method can be used for all cases but when the method is ran again it will remove oneDigit from the screen. Using imageView it doesn't remove anything from the screen.
      singulars
      1. POHow do you set up an UIImageView to point to another UIImageView
      1. USmichaellindahl
 

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