Realm - 如何在列表中查找字符串 [英] Realm - how to find a string in a List

问题描述

这是我的对象:

class Cat: Object {让玩具 = List()}

如何在toys数组中找到一个玩具并删除它?

if let foundToy = cat.toys.filter(???).first {尝试！领域.写{领域.删除(foundToy)}}

解决方案

如果您要保留一个不同 String 的数组(即，toys 数组不包含重复项)，您只需删除找到的第一个 String:

>

if let toyIndex = cat.toys.firstIndex(of: toyNameToBeDeleted) {尝试！领域.写{cat.toys.remove(at: toyIndex)}}

如果您尝试删除所有 String 对象 == 到某个玩具名称，请改为执行此操作:

 试试吧！领域.写{cat.toys = cat.toys.filter { $0 != toyNameToBeDeleted }}

Here's my object:

class Cat: Object {
    let toys = List<String>()
}

How can I find a toy in the toys array and delete it?

if let foundToy = cat.toys.filter(???).first {
     try! realm.write {
        realm.delete(foundToy)
     }
}

解决方案

If you are keeping an array of distinct String (i.e., the toys array doesn't contain duplicates), you can just delete the first String found:

if let toyIndex = cat.toys.firstIndex(of: toyNameToBeDeleted) {
     try! realm.write {
          cat.toys.remove(at: toyIndex)
     }
}

If you are trying to delete all String objects == to a certain toy name, do this instead:

 try! realm.write {
     cat.toys = cat.toys.filter { $0 != toyNameToBeDeleted }
 }

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