import UIKit
import CoreData
class MainMenu: UITableViewController, NSFetchedResultsControllerDelegate {
/**********/
/** Vars **/
/**********/
lazy var frcAccount: NSFetchedResultsController = self.AccountFetchedResultController()
lazy var frcCar: NSFetchedResultsController = self.CarFetchedResultsController()
let idxAccNew = NSIndexPath(forRow: 0, inSection: 0)
let idxCarNew = NSIndexPath(forRow: 0, inSection: 1)
let idxConfig = NSIndexPath(forRow: 0, inSection: 2)
/**************/
/** IBOutlet **/
/**************/
/***************/
/** IBActions **/
/***************/
/***************/
/** Functions **/
/***************/
// MARK:- NSFetchedResultsController
func AccountFetchedResultController() -> NSFetchedResultsController {
let fetchRequest = NSFetchRequest(entityName: Account.entityName)
fetchRequest.fetchBatchSize = 10
let sortDescriptor = NSSortDescriptor(key: "id", ascending: false)
fetchRequest.sortDescriptors = [sortDescriptor]
frcAccount = NSFetchedResultsController(fetchRequest: fetchRequest,
managedObjectContext: coreDataStack.context,
sectionNameKeyPath: nil,
cacheName: nil)
frcAccount.delegate = self
do {
try frcAccount.performFetch()
} catch {
print("Erro: \(error)")
abort()
}
return frcAccount
}
func CarFetchedResultsController() -> NSFetchedResultsController {
let fetchRequest = NSFetchRequest(entityName: "Car")
fetchRequest.fetchBatchSize = 10
let sortDescriptor = NSSortDescriptor(key: "plate", ascending: false)
fetchRequest.sortDescriptors = [sortDescriptor]
frcCar = NSFetchedResultsController(fetchRequest: fetchRequest,
managedObjectContext: coreDataStack.context,
sectionNameKeyPath: nil,
cacheName: nil)
frcCar.delegate = self
do {
try frcCar.performFetch()
} catch {
print("Error: \(error)")
abort()
}
return frcCar
}
//MARK:- TableViewDataSource
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 3
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
switch section{
case 0:
return frcAccount.sections![0].numberOfObjects + 1
case 1:
return frcCar.sections![0].numberOfObjects + 1
default:
return 1
}
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if indexPath.section == 0 {
if indexPath.row == 0 {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell") //as UITableViewCell
cell!.textLabel?.text = "Nova Conta"
return cell!
} else {
let cell = tableView.dequeueReusableCellWithIdentifier("CellAccount") as! VC_AccountListTableViewCell
let idx = NSIndexPath(forRow: indexPath.row - 1, inSection: 0)
let object = frcAccount.objectAtIndexPath(idx) as! Account
cell.useAccountInfo(object)
return cell
}
} else if indexPath.section == 1{
if indexPath.row == 0 {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell")
cell!.textLabel?.text = "Novo Carro"
return cell!
} else {
let cell = tableView.dequeueReusableCellWithIdentifier("CellCar") as! VC_CarListTableViewCell
let idx = NSIndexPath(forRow: indexPath.row - 1, inSection: 0)
let object = frcCar.objectAtIndexPath(idx) as! Car
cell.useCarInfo(object)
cell.btnFillUp.tag = indexPath.row - 1
cell.btnService.tag = indexPath.row - 1
return cell
}
} else {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell")
cell!.textLabel?.text = "Configurações"
return cell!
}
}
// MARK: TableViewDelegate
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if indexPath == idxAccNew || indexPath == idxCarNew || indexPath == idxConfig {
return 44
} else {
if indexPath.section == 0 {
return 80
} else if indexPath.section == 1 {
return 100
} else {
return 0
}
}
}
// MARK:- NSFetchedResultsControllerDelegate
func controllerWillChangeContent(controller:NSFetchedResultsController) {
tableView.beginUpdates()
}
func controller(controller: NSFetchedResultsController, didChangeSection sectionInfo: NSFetchedResultsSectionInfo, atIndex sectionIndex: Int, forChangeType type: NSFetchedResultsChangeType) {
switch(type) {
case .Insert:
tableView.insertSections(NSIndexSet(index: sectionIndex), withRowAnimation: .Fade)
case .Delete:
tableView.deleteSections(NSIndexSet(index: sectionIndex), withRowAnimation: .Fade)
default:
return
}
}
func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {
switch (type) {
case .Insert:
tableView.insertRowsAtIndexPaths([newIndexPath!], withRowAnimation: .Fade)
case .Delete:
tableView.deleteRowsAtIndexPaths([indexPath!], withRowAnimation: .Fade)
case .Move:
tableView.deleteRowsAtIndexPaths([indexPath!], withRowAnimation: .Fade)
tableView.insertRowsAtIndexPaths([newIndexPath!], withRowAnimation: .Fade)
case .Update:
tableView.reloadRowsAtIndexPaths([indexPath!], withRowAnimation: .Fade)
}
}
func controllerDidChangeContent(controller: NSFetchedResultsController) {
tableView.reloadData()
tableView.endUpdates()
}
func reloadData() {
tableView.reloadData()
}
}
有可能这样做吗?我尝试了很多不同的解决方案..
全部谢谢
答案 0 :(得分:0)
在tableView数据源方法中,您正确地将tableView的indexPath
重新映射到相关的FRC indexPath
,同时还调整了额外的第一行,例如:
let idx = NSIndexPath(forRow: indexPath.row - 1, inSection: 0)
(请注意,您必须在其他tableView数据源委托方法中使用类似的重新映射,例如,如果您实现didSelectRowAtIndexPath
)。但是你还需要在FRC委托方法中进行反向映射,例如。
func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {
var tvIdx = NSIndexPath()
var newTvIdx = NSIndexPath()
var tvSection = 0
// for the Car FRC, we need to insert/delete rows in table view section 1:
if (controller == self.frcCar) {
tvSection = 1
}
// adjust the indexPaths (indexPath and newIndexPath)
// to add the extra row, and use the correct tableView section:
if let idx = indexPath {
tvIdx = NSIndexPath(forRow: idx.row + 1, inSection: tvSection)
}
if let newIdx = newIndexPath {
newTvIdx = NSIndexPath(forRow: newIdx.row + 1, inSection: tvSection)
}
switch (type) {
case .Insert:
tableView.insertRowsAtIndexPaths([newTvIdx], withRowAnimation: .Fade)
case .Delete:
tableView.deleteRowsAtIndexPaths([tvIdx], withRowAnimation: .Fade)
case .Move:
tableView.deleteRowsAtIndexPaths([tvIdx], withRowAnimation: .Fade)
tableView.insertRowsAtIndexPaths([newTvIdx], withRowAnimation: .Fade)
case .Update:
tableView.reloadRowsAtIndexPaths([tvIdx], withRowAnimation: .Fade)
}
}
因此无需在reloadData
中使用controllerDidChangeContent
:
func controllerDidChangeContent(controller: NSFetchedResultsController) {
tableView.endUpdates()
}