CODEWITHSUNDEEP
iosswiftswift3uiimageview
Evgeny
Evgeny

Reputation: 384

Creating UIImageView with a tag. Swift 3

I have an int n that holds value. I want to create a loop that will create UIImageViews with consecutive tags.

My code: 

var n:Int = 1
 if arrayOfEmojis.count != 0 {
        for emoji in arrayOfEmojis {

                let emojiView  = self.view.viewWithTag(n) as! UIImageView
                emojiView.image = emoji
                 ...

}

but the emojiView isn't created. When I use "if let emojiView = " it also just not created. Am i using "viewWithTag(n)" func wrong?

_______edit_________

was using .viewWithTag() wrong, had to just assign a tag with .tag property. However, now, I want to get that view using the tag that was assigned. I figured now i can use .viewWithTag() func? I get unexpectedly found nil... when calling : (n was used in previous loop where imageViews was created, and it was updated to the number of imageViews that was created):

if arrayOfEmojis.count != 0 {
        for j in 1...n {

            var view1 = self.view.viewWithTag(j) as! UIImageView
            arrayOfEmojiViews.append(view1)
        }
    }

Upvotes: 3

Views: 4480

Answers (1)

Ahmad F
Ahmad F

Reputation: 31645

I think you are misunderstanding the purpose of using view​With​Tag(_:​):

Returns the view whose tag matches the specified value.

It does not create a new instance, it is used for getting a specific identified view based on its tag value.

If I am not mistaking, you want to create new instances, by mentioning:

I want to create a loop that will create UIImageViews with consecutive tags*.

It should be similar to:

var n:Int = 1
var currentTag = 0
if arrayOfEmojis.count != 0 {
    for emoji in arrayOfEmojis {

        let emojiView = UIImageView(image: emoji)
        emojiView.tag = currentTag
        currentTag += 1
        // don't forget to set the frame for the emojiView
        ...
    }
}

For each iteration, a new instance of UIImageView will be created -by using init(image:​) initializer- and setting its tag value "consecutively" based on the current value of currentTag variable.

Upvotes: 1

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