我正在尝试在领域中创建一对多关系，也称为父子关系。我查看了领域提供的文档，但是在如何进行实际保存到领域方面仍然有些困惑。我有两个视图，主视图是一个视图控制器，它只有一个带有数字1-7的表格视图。在此视图中，我可以批量选择用于编辑表中的这些行并将其保存到领域。那部分没什么大不了的。
在下一个视图中，我有一个非常相似的地方，即一个带有一些示例数据的表视图。有一个批量选择行按钮，很好，这是我遇到麻烦的保存按钮。这个tableView中的数据（出于测试目的，所有这些都相同）是我希望与第一个视图中的数据具有子关系的数据。
例如，如果我有4个保存到领域，则单击上面带4的行，它将带我到下一个视图。关于此的tableview有两行和其他数据，但是我希望能够大量选择这些行并将其作为子级保存到4。对于“保存到领域”功能的外观，我有些困惑。
这是我的第一个视图控制器
import UIKit
import Realm
import RealmSwift
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
@IBOutlet weak var tableView: UITableView!
var realm: Realm!
fileprivate var createSaves = SaveClass.createSaves()
var testingBool = false
var values: [String] = []
var valuesTwo: [String] = []
var valuesThree: [String] = []
@IBOutlet weak var itemBtn: UIBarButtonItem!
@IBOutlet weak var saveBtn: UIBarButtonItem!
override func viewDidLoad() {
super.viewDidLoad()
print(Realm.Configuration.defaultConfiguration.fileURL!)
realm = try! Realm()
self.tableView.delegate = self
self.tableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return createSaves.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
cell.txtLbl?.text = "\(createSaves[indexPath.row].label)"
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if testingBool == true {
values.append(createSaves[indexPath.row].label)
valuesTwo.append(createSaves[indexPath.row].romanNum)
valuesThree.append(createSaves[indexPath.row].txt)
} else if testingBool == false {
performSegue(withIdentifier: "segue", sender: indexPath)
}
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
if testingBool == true {
if let index = values.index(of: createSaves[indexPath.row].label) {
values.remove(at: index)
}
if let index = valuesTwo.index(of: createSaves[indexPath.row].romanNum) {
valuesTwo.remove(at: index)
}
if let index = valuesThree.index(of: createSaves[indexPath.row].txt) {
valuesThree.remove(at: index)
}
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let nxtVC = segue.destination as? TestingViewController
let myIndexPath = self.tableView.indexPathForSelectedRow!
let row = myIndexPath.row
nxtVC?.realmedData = createSaves[row].label
}
@IBAction func btnPressed(_ sender: Any) {
testingBool = !testingBool
if testingBool == true {
tableView.allowsMultipleSelection = true
tableView.allowsMultipleSelectionDuringEditing = true
itemBtn.title = "cancel"
} else if testingBool == false {
tableView.allowsMultipleSelection = false
tableView.allowsMultipleSelectionDuringEditing = false
itemBtn.title = "item"
}
}
@IBAction func saveBtnPressed(_ sender: Any) {
if testingBool == true {
//favorite(label: values)
realmed(label: values, romanNum: valuesTwo, txt: valuesThree)
}
}
func realmed(label: [String], romanNum: [String], txt: [String]) {
try? realm!.write {
for (stringOne, (stringTwo, stringThree)) in zip(label, zip(romanNum, txt)) {
let realmed = Realmed(label: stringOne, romanNum: stringTwo, txt: stringThree)
realm.add(realmed)
}
}
}
}
这是我的第二个观点
import UIKit
import Realm
import RealmSwift
class TestingViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
@IBOutlet weak var mainLbl: UILabel!
var realm: Realm!
var realmedData = ""
var testingBool = false
var values: [String] = []
var valuesTwo: [String] = []
@IBOutlet weak var testTable: UITableView!
@IBOutlet weak var selectBtn: UIButton!
@IBOutlet weak var saveBtn: UIButton!
let firstSave = OtherSave.otherArrOne()
override func viewDidLoad() {
super.viewDidLoad()
realm = try! Realm()
self.testTable.delegate = self
self.testTable.dataSource = self
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if objectExists(label: realmedData) == true {
self.mainLbl.text = "\(realmedData)"
} else {
self.mainLbl.text = "Don't Know"
}
}
@IBAction func selectBtnPressed(_ sender: Any) {
testingBool = !testingBool
if testingBool == true {
testTable.allowsMultipleSelection = true
testTable.allowsMultipleSelectionDuringEditing = true
} else if testingBool == false {
testTable.allowsMultipleSelection = false
testTable.allowsMultipleSelectionDuringEditing = false
}
}
@IBAction func saveBtnPressed(_ sender: Any) {
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return firstSave.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell2", for: indexPath) as! TestingTableViewCell
cell.nameLbl.text = "\(firstSave[indexPath.row].name)"
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if testingBool == true {
values.append(firstSave[indexPath.row].info)
valuesTwo.append(firstSave[indexPath.row].name)
}
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
if testingBool == true {
if let index = values.index(of: firstSave[indexPath.row].info) {
values.remove(at: index)
}
if let index = valuesTwo.index(of: firstSave[indexPath.row].name) {
valuesTwo.remove(at: index)
}
}
}
func fetchingLabel(label: String) -> Realmed? {
let realm = try? Realm()
return realm?.object(ofType: Realmed.self, forPrimaryKey: label)
}
func objectExists(label: String) -> Bool {
return realm.object(ofType: Realmed.self, forPrimaryKey: label) != nil
}
}
这是父级的领域对象：
import Foundation
import Realm
import RealmSwift
class Realmed: Object {
@objc dynamic var label = ""
@objc dynamic var romanNum = ""
@objc dynamic var txt = ""
let realmTwo = List<RealmTwo>()
override static func primaryKey() -> String {
return "label"
}
convenience init(label: String, romanNum: String, txt: String) {
self.init()
self.label = label
self.romanNum = romanNum
self.txt = txt
}
}
这是孩子的境界对象
import Foundation
import UIKit
import Realm
import RealmSwift
class RealmTwo: Object {
@objc dynamic var spanish = String()
@objc dynamic var french = String()
let realmed = LinkingObjects(fromType: Realmed.self, property: "realmTwo")
}
我试图做一个类似于第一个视图控制器的功能：
func realmed(label: [String], romanNum: [String], txt: [String]) {
try? realm!.write {
for (stringOne, (stringTwo, stringThree)) in zip(label, zip(romanNum, txt)) {
let realmed = Realmed(label: stringOne, romanNum: stringTwo, txt: stringThree)
realm.add(realmed)
}
}
}
但是我不太了解如何创建要保存为数组的数据实例。
如果有什么我可以帮助的，请询问 谢谢
答案 0 :(得分：1)
我假设您想从“ values”和“ valuesTwo”创建“ RealmTwo”对象并将其添加到Realmed对象。
您想要做的是
您可以使用类似的功能来做到这一点。
func save() {
let realmed = fetchingLabel(label: realmedData)! // fetch a parent
do {
try realm.write {
for index in 0..<values.count {
let realmTwo = RealmTwo() // create a child
realmTwo.french = values[index]
realmTwo.spanish = valuesTwo[index]
realmed.realmTwo.append(realmTwo) // append
}
}
} catch {
}
}