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It should be easy but I can only find the reverse conversion. How can I convert Int32 to Int in Swift? Unless the problem is different?
I have a value stored in Core Data and I want to return it as an Int.
Here is the code I am using, which does not work:
func myNumber () -> Int { var myUnit:NSManagedObject myUnit=self.getObject(“EntityName”) // This is working. return Int(myUnit.valueForKey(“theNUMBER”)?.intValue!) } 
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Using Int initializer Swift provides the function of integer initializers using which we can convert a string into an Int type. To handle non-numeric strings, we can use nil coalescing using which the integer initializer returns an optional integer.
Swift provides signed and unsigned integers in 8, 16, 32, and 64 bit forms. These integers follow a naming convention similar to C, in that an 8-bit unsigned integer is of type UInt8 , and a 32-bit signed integer is of type Int32 . Like all types in Swift, these integer types have capitalized names.
Am I missing something or isn't this ridiculously easy?
let number1: Int32 = 10 let number2 = Int(number1) The error is your ? after valueForKey.
Int initializer doesnt accept optionals.
By doing myUnit.valueForKey(“theNUMBER”)?.intValue! gives you an optional value and the ! at the end doesnt help it.
Just replace with this:
return Int(myUnit.valueForKey(“theNUMBER”)!.intValue) But you could also do like this if you want it to be fail safe:
return myUnit.valueForKey(“theNUMBER”)?.integerValue ?? 0 And to shorten you function you can do this:
func myNumber() -> Int { let myUnit = self.getObject("EntityName") as! NSManagedObject return myUnit.valueForKey("theNUMBER")?.integerValue ?? 0 } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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