Remove Programmatically Added Uiimageview

Remove programmatically added UIImageView

You can keep track of that imageView in some property, and when you want to remove it you simply:

imageView.removeFromSuperview()  // this removes it from your view hierarchy 
imageView = nil;                 // if your reference to it was a strong reference, make sure to `nil` that strong reference

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BTW, as you may know, UIImage(named:...) will cache the images in memory. If you want that, fine, but if not, you might want to use UIImage(contentsOfFile:...) with the fully qualified path to that resource. If you use UIImage(named:...), the image will stay in memory even after the UIImageView has been removed. As the documentation says:

If you have an image file that will only be displayed once and wish to ensure that it does not get added to the system’s cache, you should instead create your image using imageWithContentsOfFile:. This will keep your single-use image out of the system image cache, potentially improving the memory use characteristics of your app.

Removing UIImageView added programmatically

Check that both the addSubview and removeFromSuperView are called in main thread

Check that startShowingImage is only called once, otherwise you have orphaned UIImageViews that you can never remove

- (void)startShowingImage
{
    if (self.advertiseView) {
        self.advertiseView = [[UIImageView alloc] initWithFrame:CGRectMake(80,320,150,97)];
        self.advertiseView.image = [UIImage imageNamed:@"blocksAd.png"];

        [self.view addSubview:self.advertiseView];
        NSLog(@"startShowing");
    }
}

Use property syntax unless you specifically need otherwise to avoid problems

iOS - adding/removing a subview programmatically

If you are not going to use the image again, there is no need to keep a pointer to it. Further, if you use IBOutlet, you need to add the view in IB as well. In this specific example I would say option 3 makes the most sence, especially considering that with this choice you can began with a standard "view based application" template and just add the bits about the image view and leave the rest alone. One last observation of choice 3 though; the 2 messages to window;

 [self.window addSubview:myViewController.view];

 [self.window makeKeyAndVisible];

Appear to be outside the scope of any method. This is likely just a copy and paste error, but make note that they should located within "didFinishLaunchingWithOptions:"

Removing image from UIImageView

Setting the UIImageView as:

myImageView.image = nil 

is the correct way to clear an UIImageView. Are you loading the image when your calling function returns? Is your UIImageView being declared, and/or used elsewhere in your main function?

How to remove UIView from the superView with specific position programmatically

You could use tag for each UIImageView based on the indexPath.row so you could refer by tag.

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    let image = UIImage(data: Saveddata[indexPath.row].photo as! Data)
    //create image view programmatically
    let imageView = UIImageView(frame: CGRect(x: 130 + (i * 10), y: 50 + (i * 5), width: 50, height: 100))
    imageView.contentMode = .scaleAspectFit
    imageView.tag = 100 + indexPath.row
    imageView.image = image
    view.addSubview(imageView as UIView)
}

func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
     // get imageView by its tag        
    let deselectedImageView = view.viewWithTag(100 + indexPath.row) as! UIImageView
    deselectedImageView.removeFromSuperview()

}

Delete images programmatically by accessing their tag

You should use viewWithTag to retreive the last tag, remove that tag from the array and remove the image from its superview.

if lstPoint.count != 0,
    let lastTag = lstTagImage.last {
    lstPoint.remove(at: lstPoint.count - 1)
    lstTagImage.removeLast()

    let imageView = view.viewWithTag(lastTag)
    imageView.removeFromSuperview()
}

How to Programmatically Remove A UIImageView By touchGesture

A tap gesture recognizer has a view property that points to the view it's attached to. So, in the action method for the recognizer, use it to remove itself from its superview,

-(void) tapped:(UITapGestureRecognizer *)recognizer{
[recognizer.view removeFromSuperview];
}

It's hard to tell why your method isn't working. It could be because _ZombieView is nil (I don't see anywhere you actually create _ZombieView as opposed to ZombieView which you do create). BTW, you should start your property and variable names with a lowercase letter to conform to the usual objective-c naming conventions.

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