swift get range of attribute by index in NSAttributedString

Question

I have a NSAttributedString with 2 attributes

From 0 to 5 {0,5} -> attribute1

from 6 to 10 {6,10} -> attribute2

I use

let attributes = textView.textStorage.attributes(at: 7, longestEffectiveRange: nil, in: NSRange(location: 0, length: textView.textStorage.length))

to get attribute at index 7.

Is possibile have the full range of attribute at index 7?

In my example I should get 6-10

Thanks

Answer 1

Yes you can, using enumerateAttributes provide by NSAttributedString to do that. Means that take all the range of each attribute in your string and find which range contains your index

Code will be like this

var index = 7

attributeString.enumerateAttributes(in: NSRange(location: 0, length: attributeString.length), using: {
    _, range, _ in
    // if index in range
    if range.contains(index) {
        print("range: ", range)
        // do your code here
    }
})