CODEWITHSUNDEEP
iosswiftplist
leisdorf
leisdorf

Reputation: 51

Swift: Retrieving data from a plist with a for in loop

I am new to Swift and am having trouble retrieving information in a plist (see image), specifically in terms of iterating over the content and comparing the plist to user input. I have a

"Type 'String' does not conform to protocol 'Sequence Type'

error in my code.

func matchTraveller(location: Destination, preference: TravellingPreference) -> String{
    var message = ""
    if let path = NSBundle.mainBundle().pathForResource("Locals", ofType: "plist"){
        if let map = NSDictionary(contentsOfFile: path){
            if let locals = map["Local"] as? String {
                for local in locals{ // <-- ERROR HERE
                    let city = local["City"]
                    if local["City"] == location {
                        message = "We have matched you with \(local) in \(city)."
                    } else{
                        message = "Apologies, there aren't any locals registered in \(city) on LocalRetreat. Try again soon!"
                        break
                    }
                    if local["Preference"] == preference{
                        let prefer = local["Preference"]
                        message += "\(local) is also a \(prefer)"
                    }
                    return message
                }
            }
        }

    }
}

Code

Plist

Upvotes: 1

Views: 321

Answers (2)

ryantxr
ryantxr

Reputation: 4219

You are telling Swift that locals is a string. I think you meant to define it as [String].

if let locals = map["Local"] as? String {

Change to:

if let locals = map["Local"] as? [String] {

Your plist data does not match the code. What you have in the plist is a dictionary of array of String. 

[String: [String]]

The code is attempting to access it as dictionary of array of dictionary of string: string.

[String: [String: String]]

You can either modify the plist data or change the code. Which one would you like?

Upvotes: 2

yaakov
yaakov

Reputation: 5850

You need to define the type you are expecting.

It looks like you're expecting locals to be an array of dictionaries (either [String: String] or [String: AnyObject], so try casting map["Local"] to that (i.e. [[String: String]]).

Ultimately a plist is a way to serialise structured data. You need to understand the structure you're dealing with before you can start working you way through one.

Upvotes: -1

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