Ambiguous use of intValue Swift3 - migration

Question

I have been trying to convert existing swift2.3 to swift3. I got Ambiguous use on intValue error at the following code.
jobPackageVersion.intJobPackageId = (JobPackageVersionDictionary["intJobPackageId"]! as AnyObject).intValue as NSNumber
Here is the full code
if let url = Bundle.main.url(forResource: "tblJobPackageVersion", withExtension: "csv") {
do {
let strData = try String(contentsOf: url)
let csv = CSwiftV(String: strData)
if csv.keyedRows != nil {
for dictionary in csv.keyedRows! { // [Dictionary<String, String>]
let JobPackageVersionDictionary = dictionary as NSDictionary // Cast to NSDictionary
let JobPackageVersionEntity = NSEntityDescription.entity(forEntityName: "JobPackageVersion", in: context)
let jobPackageVersion = JobPackageVersion(entity: JobPackageVersionEntity!, insertInto: context)
// Set object attributes
jobPackageVersion.intJobPackageId = (JobPackageVersionDictionary["intJobPackageId"]! as AnyObject).intValue as NSNumber
jobPackageVersion.intJobPackageVersionId = (JobPackageVersionDictionary["intJobPackageVersionId"]! as AnyObject).intValue as NSNumber
jobPackageVersion.intStatus = (JobPackageVersionDictionary["intStatus"]! as AnyObject).intValue as NSNumber
jobPackageVersion.intVersion = (JobPackageVersionDictionary["intVersion"]! as AnyObject).intValue as NSNumber
do { // Save object to database and clean up memory
try context.save()
context.refresh(jobPackageVersion, mergeChanges: false)
} catch let error as NSError { Logger.sharedInstance.logMessage("\(#function) JobPackageVersion Saving Error: \(error.userInfo)") }
} // for-loop
Logger.sharedInstance.logMessage("\(#function): Loaded \(csv.keyedRows!.count) tblJobPackageVersion records.")
} else { Logger.sharedInstance.logMessage("\(#function) CSV Parser Warning: no CSV data was parsed in tblJobPackageVersion.csv!") }
} catch { Logger.sharedInstance.logMessage("\(#function) Error reading contents of tblJobPackageVersion.csv.") }
} else { Logger.sharedInstance.logMessage("\(#function) Error locating URL for resource tblJobPackageVersion.csv") }
}
Any help would be appreciated.
Thanks.

Answer 1

You're trying to call intValue on an object of type AnyObject. As the error states, this is too ambiguous because both NSNumber and NSString have intValue properties. Xcode doesn't know which intValue to use, because both NSNumber and NSString fall under the AnyObject umbrella. Since Xcode is confused, you need to be more specific about what type your object is. Try something like this:
jobPackageVersion.intJobPackageId = (JobPackageVersionDictionary["intJobPackageId"]! as NSNumber).intValue
Note 1: You're probably going to get the same error with the other objects you call intValue on, but you can fix them accordingly.
Note 2: Be extremely careful about force unwrapping your objects using !. If the dictionary you're using ever returns nil your program will crash. Instead I would safely unwrap them using either an if let or guard statement depending on your use case. Something like this may work a little better:
guard let intJobPackageId = JobPackageVersionDictionary["intJobPackageId"] as? NSNumber,
let intJobPackageVersionId = JobPackageVersionDictionary["intJobPackageVersionId"] as? NSNumber,
let intStatus = JobPackageVersionDictionary["intStatus"] as? NSNumber,
let intVersion = JobPackageVersionDictionary["intVersion"] as? NSNumber
else {
print("one of the dictionary values is nil")
return
}
jobPackageVersion.intJobPackageId = intJobPackageId.intValue
jobPackageVersion.intJobPackageVersionId = intJobPackageVersionId.intValue
jobPackageVersion.intStatus = intStatus.intValue
jobPackageVersion.intVersion = intVersion.intValue
This may not be exactly what you want, but it should give you an idea on how to safely unwrap your objects so your app doesn't crash. You can play around with it and decide what's best for you.