accessing inner dictionaries (dictionary of dictionaries) with one entry, when not knowing what key or value for that entry are - swift

Question

This is how I declared my dictionary:
var dataDictionary: [NSIndexPath:[Int:Bool]]!
The inner dictionary will always have just one entry e.g. [1:true]. When I search dataDictionary I specify a NSIndexPath. The inner dictionary gets returned. Sth like this:
var innerDictionary = dataDictionary[indexPath] // is of type [Int:Bool]
I would like to access inner dictionarys key and value, but I don't want to specify an Integer or Bool, because it is unknown. I only want to get that Int and/or Bool value stored in inner dictionary. No search of inner dictionary is needed, because if will always contains just one entry. Maybe something like this:
var key = innerDictionary.key
var value = innerDictionary.value
How can this be accomplished?

Answer 1

If your dictionary has only one entry, and you don't know the key, with Swift 2 you can get the first element of the keys sequence safely with if let:
let innerDictionary = [42: true]
if let k = innerDictionary.keys.first {
print(k) // prints 42
} else {
// dict is empty
}
Same for the value:
if let v = innerDictionary.values.first {
print(v) // prints true
} else {
// key has no value
}

Answer 2

Try by this way:
func nestedDic(){
var innerDictionary:NSDictionary = ["Item 1": "data 0", "Item 2": "data 1"]
//NSLog("original object:\(innerDictionary)")
NSLog("all keys array:\(innerDictionary.allKeys)")
if(innerDictionary.isKindOfClass(NSDictionary)){
for key in innerDictionary.allKeys{
let value = innerDictionary.valueForKey(key as! NSString as String)
NSLog("key value = \(value as! String)")
}
}
}

Answer 3

You could create a simple struct for the inner dictionary if there is only one entry, then you are able to use your favorite property names.
struct InnerDictionary {
var key = 0
var value = false
}
let indexPath = NSIndexPath(index: 1)
var dataDictionary = [indexPath: InnerDictionary(key: 1, value: true)]
if let innerDictionary = dataDictionary[indexPath] {
var key = innerDictionary.key
var value = innerDictionary.value
}