I’m at page 52 of the Swift 3 version of the book and when executing the fetch, results is empty.
// insert sample data
insertSampleData()
let request = NSFetchRequest<Bowtie>(entityName: "Bowtie")
let firstTitle = segmentedControl.titleForSegment(at: 0)!
print("searchKey is: \(firstTitle)")
request.predicate = NSPredicate(format: "searchKey == %@", firstTitle)
do {
let results = try managedContext.fetch(request)
if results.count > 0 {
populate(bowtie: results.first!)
} else {
print("ERROR: fetch results is empty")
}
} catch let error as NSError {
print("Could not fetch: \(error), \(error.userInfo)")
}
The console print ERROR: fetch results is empty. I checked that the sample data was inserted into the context and that the save did not result in an error:
func insertSampleData() {
let fetch = NSFetchRequest<Bowtie>(entityName: "Bowtie")
fetch.predicate = NSPredicate(format: "searchKey != nil")
let count = try! managedContext.count(for: fetch)
if count > 0 {
// sample data is already loaded
return
}
let path = Bundle.main.path(forResource: "SampleData", ofType: "plist")
let dataArray = NSArray(contentsOfFile: path!)!
for dict in dataArray {
let entity = NSEntityDescription.entity(forEntityName: "Bowtie", in: managedContext)!
let bowtie = Bowtie(entity: entity, insertInto: managedContext)
let btDict = dict as! [String:AnyObject]
bowtie.name = btDict["name"] as? String
print("\(bowtie.name) is being inserted")
bowtie.searchKey = btDict["seachKey"] as? String
bowtie.rating = btDict["rating"] as! Double
let colorDict = btDict["tintColor"] as! [String:AnyObject]
bowtie.tintColor = UIColor.color(dict: colorDict)
let imageName = btDict["imageName"] as? String
let image = UIImage(named: imageName!)
let photoData = UIImagePNGRepresentation(image!)!
bowtie.photoData = NSData(data: photoData)
bowtie.lastWorn = btDict["lastWorn"] as? NSDate
let timesNumber = btDict["timesWorn"] as! NSNumber
bowtie.timesWorn = timesNumber.int32Value
bowtie.isFavorite = btDict["isFavorite"] as! Bool
}
do {
try managedContext.save()
print("context saved successfully")
} catch let error as NSError {
print("Could not save data: \(error), \(error.userInfo)")
}
}
And each sample tie is inserted and I get the context saved successfully report in the console. I’m not sure what I’m missing here so any help would be appreciated!
Thanks,
Denis