我正在尝试将 IN 子句与 NSPredicate 一起使用。我收到以下错误:
*** 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序,原因:“-[NSTaggedPointerString countByEnumerateWithState:objects:count:]:无法识别的选择器发送到实例 0xa000000000000611”
这是代码:
let fetchRequest: NSFetchRequest<Employee> = NSFetchRequest(entityName: "Employee")
fetchRequest.sortDescriptors = [
NSSortDescriptor.init(key: "lastName", ascending: true)
]
fetchRequest.predicate = NSPredicate(format: "ANY id IN %@", argumentArray: recentEmployeeIds)
fetchedResultsController = NSFetchedResultsController.init(fetchRequest: fetchRequest,
managedObjectContext: FLCoreDataController.shared.mainObjectContext,
sectionNameKeyPath: nil,
cacheName: nil)
fetchedResultsController?.delegate = self
try? fetchedResultsController?.performFetch()
关于问题是什么有什么想法吗?
你没有展示你是如何定义的recentEmployeeIds
,但假设它是这样的
let recentEmployeeIds:[Int] = ...
那么你需要初始化NSPredicate
正确。没有标签argumentArray
fetchRequest.predicate = NSPredicate(format: "ANY id IN %@", recentEmployeeIds)
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