iOS Swift: Could Not Cast Value Type '_Nscfnumber' to 'Nsstring'

iOS Swift: Could not cast value type '__NSCFNumber' to 'NSString'

The error is saying that your quantity is Number and you cannot directly convert number to String, try like this.

newDetail.setQuantity(quantity: "\(quantity)")

Or

if let quantity = child.childSnapshot(forPath: "quantity").value as? NSNumber {
     newDetail.setQuantity(quantity: quantity.stringValue)
}
else if let quantity = child.childSnapshot(forPath: "quantity").value as? String {
     newDetail.setQuantity(quantity: quantity)
} 

Or With Single if statement

if let quantity = child.childSnapshot(forPath: "quantity").value,
   (num is NSNumber || num is String) {
     newDetail.setQuantity(quantity: "\(quantity))
}

Using second and third option there is no need to check for nil.

Swift - 4 - Could not cast value of type '__NSCFNumber' (0x10cfb1840) to 'NSString' (0x10c0824a8)

The error is pretty clear: The value for key id is a number (Int or maybe Double)

You can read a could-not-cast error always as

Could not cast value of the right type to my proposed wrong type

fkprofession = pickOption[pickerView.selectedRow(inComponent: 0)]["id"] as! Int

Or if you need a string

fkprofession = String(pickOption[pickerView.selectedRow(inComponent: 0)]["id"] as! Int)

Swift 4: Could not cast value of type '__NSCFNumber' to 'NSString'

In Swift 4, the String initializer requires the describing: argument label.

I don't know if this will solve your problem, but your first line of code should be written:

self.adc_role_id = String(describing: res["adc_role_id"])

Could not cast value of type '__NSCFNumber' (0x25418e000) to 'NSString'

Error #1

Could not cast value of type '__NSCFNumber' (0x25418e000) to 'NSString'

Solution:

Cast latitude and longitude to Double

---

Error #2

The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions

Solution:

Assign the dictionary values to variables and then concatenate the string with Sting Interpolation

---

let city = wordsResultSet["cityName"] as! String
let name = wordsResultSet["name"] as! String
let latitude = wordsResultSet["latitude"] as! Double
let longitude = wordsResultSet["longitude"] as! Double

let aWord = "\(city) , \(name)-$-\(latitude)-$-\(longitude)"

Could not cast value of type '__NSCFNumber' (0x1105dc3c0) to 'NSString' Swift 3

It's a floating point not a string. cast is to float

let aud = rateDict["AUD"] as! Float

---

Edit: Avoid force casting, as that may crash your app if the data is not expected.
Using code below will prevent crashes

if let rateDict = dict["rates"] as? [String : Any] {
    if let aud = rateDict["AUD"] as? Float {
        print("\(aud)")
    }
}

Could not cast value of type '__NSCFNumber' (0x111189058) to 'NSString' error

Replace this

self.stringWallet = result["wallet_amount"] as! String

with

if let value = result["wallet_amount"] as? NSNumber {
  self.stringWallet = value.stringValue
}

and any casting line with same value , as the type of wallet_amount value is NSNumber not String

Could not cast value of type '_SwiftValue' error

The error reason is that Swift 3 AnyObject? cannot be cast directly to Foundation NSString.

You could write

let ft_of_time = ((anyObj["ft_of_time"] as! String as NSString).substring(to: 5) as NSString)

---

But I recommend to replace the entire line with

let ftOfTime = anyObj["ft_of_time"] as! String
let ft_of_time = ftOfTime.substring(to:ftOfTime.index(ftOfTime.startIndex, offsetBy: 5)) as NSString

It does the same but it uses native Swift API. Except the final cast to NSString (if needed at all) there is no type casting back and forth.

---

Related Topics