Question

我正在尝试使用第一个代码块here，但它是为早期版本的swift编写的。所以我为Swift 4更新了它。这就像我的游乐场一样：

import UIKit

class Person: NSObject {
   let firstName: String
   let lastName: String
   let age: Int

   init(firstName: String, lastName: String, age: Int) {
      self.firstName = firstName
      self.lastName = lastName
      self.age = age
   }

   override var description: String {
     return "\(firstName) \(lastName)"
   }
}

let alice = Person(firstName: "Alice", lastName: "Smith", age: 24)
let bob = Person(firstName: "Bob", lastName: "Jones", age: 27)
let charlie = Person(firstName: "Charlie", lastName: "Smith", age: 33)
let quentin = Person(firstName: "Quentin", lastName: "Alberts", age: 31)
let people = [alice, bob, charlie, quentin]

let bobPredicate = NSPredicate(format: "firstName = %@", "Bob")
let smithPredicate = NSPredicate(format: "lastName = %@", "Smith")
let thirtiesPredicate = NSPredicate(format: "age >= 30")

(people as NSArray).filtered(using: bobPredicate)

在最后一行(people as NSArray).filtered(using: bobPredicate)

我收到错误：error: Execution was interrupted, reason: signal SIGABRT. The process has been left at the point where it was interrupted, use "thread return -x" to return to the state before expression evaluation.

我不确定如何解决此错误。谢谢，

使用NSPredicate过滤的NSArray会导致SIGABRT

0 个答案: