ios - 在 NSPredicate 中使用正则表达式执行 NSFetchRequest

Question

我尝试用这个 NSPredicate 执行一个 NSFetchRequest:

let searchString: NSString = "приш[её]л"
let predicate = NSPredicate(format: "text MATCHES[cd] %@", searchString)
let fetchRequest = NSFetchRequest(entityName: "Data")
fetchRequest.predicate = predicate

do {
    let objects = try context!.executeFetchRequest(fetchRequest) as! [NSManagedObject]
    return objects
} catch {
    print("Error")
}

但没有结果，尽管实际上“文本”包含“пришёл”

Answer 1

我在这个问题中找到了答案:Setting up a CoreData regular expression predicate for a comma-separated list

let searchString = "приш[её]л"
let format = "(text MATCHES %@)"
let pattern = NSString(format: ".*(\\b%@\\b).*", searchString)
let predicate = NSPredicate(format: format, pattern)