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iOS Build a Weather App with Swift (Retired) Data Modeling With Structures Creating and accessing Swift Dictionaries

Posted by alex santorineos
alex santorineos
4,345 Points

Retrieve Value in Dictionary in SWIFT

The directions are, "Retrieve the language used for iOS development by using the relevant key and dictionary subscripting notation and store it in a variable named iosLanguage."

I feel I followed the instructions but I constantly get an error when I run it. Help!

dictionaries.swift 
let languages: Dictionary = ["iOS": "Swift", "Android":"Java"]


var iosLanguage = for value in languages.values.array {
    println("\(value)")
}

2 Answers

Daniel Sattler
Daniel Sattler
4,867 Points
Daniel Sattler
Daniel Sattler
4,867 Points

Try this ;-)

let languages = ["iOS": "Swift","Android": "Java"]

var iosLanguage = languages["iOS"]

Make sure you understand WHY it works this way. This is basic dictionary stuff. i highly recommend that you have a look at the Swift Basic Track... pretty good Videos and easy to understand.

You can of course just copy and paste my solution but you will have problems in the future if you don´t understand what happened.

You wanted to use an for-in Loop and assign it to a variable ... and that´s just not how you do it :-)

I hope i can help. Just ask ;-)

Tony Warner
Tony Warner
1,631 Points
Tony Warner
Tony Warner
1,631 Points

I have a similar question as the OP (and the answer above doesn't answer). Say I have a dictionary like this [PFFIle : PFFile]. This exists for an image and it's thumbnail. I need to get from all the PFObjects the image (key) and the thumb (value). How would I go about doing this? I'm not trying to get the value for a specific key. I'm trying to retrieve all the images (keys) and all the thumbs (values) and use them.