Like objective-C , how to write "valueForKey" in swift? - ios

Question

NSDictionary dic;
NSMutableArray array;
//Objective-C Code.
array = [dic valueForKey:#"Table"]; //"Table" is key in dictionary
How to write same code in Swift?

Answer 1

There is no more valueForKey: in Swift, but there is a way to use map to achieve a similar, if not same, result.
If the objects in the collection are dictionaries:
let array = dic.map { $0["table"] as? String }
If the objects in the collection are objects:
let array = dic.map{ $0.table }
If you are using Objective-C collection types like NSDictionary in your example, then like others have said, you can still continue to use valueForKey:.
let array = dic.valueForKey("table")

Answer 2

You can try this
let array: AnyObject? = dic["Table"]

Answer 3

Simple eg.
(dicDetail.valueForKey("name") as! String)

Answer 4

You can try this
var dict=NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: NSErrorPointer.null()) as NSDictionary
var temp=dict["contactname"] as String
var tem=dict.valueForKey("contactname") as String

Answer 5

You will better get the idea of how you can deal with Dictionaries in Swift
let employees = json["employees"]! as [[String : AnyObject]]
Next step is to loop the employees array and print the firstName and lastName.
Keep in mind that we are looping an array of dictionaries. Meaning that in order to get the String values from firstName and lastName we need to unwrap the optionals first:
for employee in employees {
let firstName = employee["firstName"]! as String
let lastName = employee["lastName"]! as String
println("employee: \(firstName) \(lastName)")
}
Build, run and you should see:
employee: John Doe
employee: Anna Smith
employee: Peter Jones

Answer 6

Please check this code. It might help in what you need.
var dictData = Dictionary <String,Any>()
var arrDictData = Array<Any>()
// Will store value for key in dictionary.
func storeData ( strName: String , strAge: String ) {
dictData["name"]=strName
dictData["age"]=strAge
println("dictData: \(dictData)")
storeInArray(dictData)
}
// Will store value of dictionary in array.
func storeInArray ( dict : Any ) {
arrDictData.append(dict)
println("arrDictData: \(arrDictData)")
}
// Will return count of array.
func resultArray() -> Int {
println(arrDictData.count)
return arrDictData.count
}
// This function will return value in label.
func arrDictResult( dictKey: String, rowIndex: Int) -> String {
var dataTemp = arrDictData[rowIndex] as Dictionary <String,Any>
var val = dataTemp[dictKey] as String
return val
}