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iOS Build a Weather App with Swift Simple Data Structures Loading Files From A Directory

Kyaw Kyaw Soe
Kyaw Kyaw Soe
7,528 Points
Posted by Kyaw Kyaw Soe
Kyaw Kyaw Soe
7,528 Points

I think I've answered the right code but it still error. Please help me

plist.swift 
import Foundation

// Add your code below

let plistPath = NSBundle.mainBundle().pathForResource("CrazyInformation", ofType: "plist")
NSDictionary(contentsOfFile: plistPath)
Carsten Bengaard
Carsten Bengaard
1,982 Points
Carsten Bengaard
Carsten Bengaard
1,982 Points

I think you need to assign the NSDictionary part to a constant using fx let crazy = NSDictionary... and so on?

1 Answer

Martin Wildfeuer
PLUS
Martin Wildfeuer
Courses Plus Student 11,071 Points
Martin Wildfeuer
Martin Wildfeuer
Courses Plus Student 11,071 Points

The problem here is that pathForResource returns an optional String -> String?, as it might well be that the file does not exist/can't be found. However, you do not unwrap the return value in your code. In practice, you would be doing something like this

// Optional binding
if let plistPath = NSBundle.mainBundle().pathForResource("CrazyInformation", ofType: "plist") {
   let dictionary = NSDictionary(contentsOfFile: plistPath)
}

or

// Optional binding
if let unwrappedPlistPath = plistPath {
    let dictionary = NSDictionary(contentsOfFile: unwrappedPlistPath)
}

For the sake of this course, you may also force-unwrap the return value. This is, of course, not a good idea in practice, as you can never be 100% sure that the return value is not nil.

// Forced unwrapping
let dictionary = NSDictionary(contentsOfFile: plistPath!)

P.S. You can find my original answer in this thread