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標題已說明它。 從nsfetchedresults控制器中刪除緩存的swift代碼是什麼?nsfetchedresultscontroller在swift中使用名稱刪除緩存
這是我得到的錯誤:
You have illegally mutated the NSFetchedResultsController's fetch request, its predicate, or its sort descriptor without either disabling caching or using +deleteCacheWithName:'
,代碼:
if arranged == "naam - A-Z" {
let sortDescriptor = NSSortDescriptor(key: "name", ascending: true)
self.fetchedResultsController.fetchRequest.sortDescriptors = [sortDescriptor]
}else if arranged == "naam - Z-A" {
let sortDescriptor = NSSortDescriptor(key: "name", ascending: false)
self.fetchedResultsController.fetchRequest.sortDescriptors = [sortDescriptor]
}else if arranged == "gemiddelde - 1-10" {
let sortDescriptor = NSSortDescriptor(key: "gemiddelde", ascending: true)
self.fetchedResultsController.fetchRequest.sortDescriptors = [sortDescriptor]
}else if arranged == "gemiddelde - 10-1" {
let sortDescriptor = NSSortDescriptor(key: "gemiddelde", ascending: false)
self.fetchedResultsController.fetchRequest.sortDescriptors = [sortDescriptor]
}
do {
try _fetchedResultsController!.performFetch()
} catch {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
// print("Unresolved error \(error), \(error.userInfo)")
abort()
}
tableView.reloadData()
我任何你需要的更多信息,請讓我知道。
更新:
我想是這樣的:
fetchedResultsController.deleteCacheWithName("Master")
但我不知道怎麼辦。
只是查找的NSFetchedResultsController類的引用,它有一個專門的一節「高速緩存」。 –
我知道基金,但我不知道如何使用它,因爲這:fetchedResultsController.deleteCacheWithName(「主」)不起作用 – Cing