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iOS

Posted by David Rodriguez Saavedra
David Rodriguez Saavedra
3,574 Points

the find function doenst exist in my xcode and i have the latest update

here its my error: 'find' is unavailable: call the 'indexOf()' method on the collection

     let playlistImageView = sender!.view as! UIImageView
        if let index = find(playlistArray, playlistImageView) {

        }

anyone can help? when i write find it only appears in the completer window a FIND in Upercase but the find fnction of the video doenst appears

1 Answer

Nick Kohrn
Nick Kohrn
38,025 Points
Nick Kohrn
Nick Kohrn
38,025 Points

David,

Do you know what version of Swift you are using?

Available is indexOf(), which will return the index of a given element, or it will return nil if the element does not exist in a given array.

Here is an example:

    let arrayOfNames = ["Alex",
                      "Brittany",
                      "Christopher",
                      "Denise",
                      "Eric",
                      "Francesca"]


    if let indexOfEric = arrayOfNames.indexOf("Eric") {
        let eric = arrayOfNames[indexOfEric]
        print(eric)
    } else {
        print("Eric does not exist.")
    }

The code above will print Eric.

    if let indexOfGregory = arrayOfNames.indexOf("Gregory") {
        let gregory = arrayOfNames[indexOfGregory]
        print(gregory)
    } else {
        print("Gregory does not exist.")
    }

The code above will print nil.

Using indexOf(), if the element that you are looking for exists, you will be given the index. Then, you can just access that element by passing that index to the array that contains it.

Hope this helps!