我有带值的int数组
例子:
var selectedcard=[int]()
[3,1,2]
我需要按顺序编辑所有记录
我试过但应用程序崩溃了
for item in 0...SelectedCard.count-1 {
let order = SelectedCard[item]
guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else { return }
let managedContext = appDelegate.persistentContainer.viewContext
let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "Card")
fetchRequest.predicate = NSPredicate(format: "order == %@", order)
do {
if let fetchResults = try managedContext.fetch(fetchRequest) as? [Card] {
if fetchResults.count != 0 {
for index in 0...fetchResults.count-1 {
let managedObject = fetchResults[index]
managedObject.setValue("", forKey: "folderID")
}
appDelegate.saveContext()
}
}
} catch {
print(error)
}
}
self.tableView.reloadData()
最佳答案
尝试将谓词更改为
NSPredicate(format: "order == \(order)")
关于swift - 按ID编辑所有记录(Swift 4,CoreData),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/56064625/