0
我正在使用CoreData來存儲數據。我正在使用NSNumber的數據類型存儲ContactNumber。我從數據庫中檢索數據就像在swift中將NSNumber轉換爲String的錯誤
let entityDescription =
NSEntityDescription.entityForName("Retailer",
inManagedObjectContext: managedObjectContext)
let request = NSFetchRequest()
request.entity = entityDescription
do{
let results = try managedObjectContext.executeFetchRequest(request)
for test in results
{
print(test.valueForKey("address") as? String)
print(test.valueForKey("classes") as? String)
print(test.valueForKey("contactnumber") as! NSNumber)
print(test.valueForKey("landmark") as? String)
print(test.valueForKey("name") as? String)
print(test.valueForKey("outlettype") as? String)
print(test.valueForKey("retailername") as? String)
print(test.valueForKey("type") as? String)
print(test.valueForKey("credit") as? String)
self.arrayOfData.append((StoringClass(retailersname: (test.valueForKey("retailername") as? String)!, names: (test.valueForKey("name") as? String)!, outlettypes: (test.valueForKey("outlettype") as? String)!, types: (test.valueForKey("type") as? String)!, credits: (test.valueForKey("credit") as? String)!, landmarks: (test.valueForKey("landmark") as? String)!, classestype: (test.valueForKey("classes") as? String)!, addresses: (test.valueForKey("address") as? String)!, contactnumbers:s)))
}
但我的問題是我收到ContactNumber爲「-27790.000000」這樣的。 我試圖將NSNumber轉換爲字符串,但它不適用於我。
let s:String = String(format:"%f", test.valueForKey("contactnumber")!.doubleValue)
print(s) - output: 「-27790.000000」
有誰能告訴我我在做什麼錯誤。
ThanksIn提前