我在分页方面有问题... 当我尝试更改城市时，我的pageNumber + 1（但我设置为0）吗？ 当我滚动底部时，viewModel.loadPartners（）不起作用 有人帮我 我尝试向下滚动（在调试中打印很多“ 1111”）时尝试发送请求（仅当我的totalElements大于10时）
请检查我的“ tableView.rx.contentOffset”和viewmodel文件夹
我尝试使用此代码 https://jayeshkawli.ghost.io/swift-infinite-loading-items-in-collection-view/
我的代码是
struct PartnersFilterCredentionals {
let cityID:String
let catID:String
let pageNumber:String
}
private let batchSize: Int = 10
class PartnersViewModel: ViewModelProtocol {
var productsCollection: Variable<[PartnersItem]>
var currentBeginningIndex: Int
var currentEndingIndex: Int
var productsCount: Variable<Int>
var loadingProducts: Variable<Bool>
var pageLoadFinished: Variable<Bool>
var currentPageNumber: Int
struct Input {
let fetchingPartners: AnyObserver<Void>;
let cityID: AnyObserver<String>;
let catID: AnyObserver<String>;
let pageNumber: AnyObserver<String>;
}
struct Output {
let partnersResultObservable: Observable<[PartnersItem]>;
let errorsObservable: Observable<ErrorResponse>;
}
let input: Input;
let output: Output;
//Input
private let fetchingPartnersSubject = PublishSubject<Void>();
private let cityIDSubject = PublishSubject<String>();
private let catIDSubject = PublishSubject<String>();
private let pageNumberSubject = PublishSubject<String>();
//Output
private let partnersResultSubject = PublishSubject<[PartnersItem]>();
private let errorSubject = PublishSubject<ErrorResponse>();
let disposeBag = DisposeBag();
var partnerService: PartnersService
init(service: PartnersService) {
input = Input(fetchingPartners:
fetchingPartnersSubject.asObserver(), cityID: cityIDSubject.asObserver(), catID: catIDSubject.asObserver(), pageNumber: pageNumberSubject.asObserver());
partnerService = service
output = Output(partnersResultObservable: partnersResultSubject.asObserver(), errorsObservable: errorSubject.asObserver());
productsCollection = Variable([])
currentBeginningIndex = 0
currentEndingIndex = 0
currentPageNumber = 0
productsCount = Variable(0)
pageLoadFinished = Variable(false)
self.loadingProducts = Variable(false)
loadPartners()
}
func loadPartners(){
guard !loadingProducts.value else {return}
self.loadingProducts.value = true
fetchingPartnersSubject.withLatestFrom(partnersFilterCredentionals).observeOn(ConcurrentMainScheduler.instance).flatMapLatest { credentials in
return self.partnerService.fetchAllPartners(partnersFilterCredentionals: credentials).materialize()
}.subscribe(onNext: { [weak self] event in
switch event {
case .next(let data):
let allProducts = data.retailList
self?.currentBeginningIndex = (self?.productsCollection.value.count)!
self?.currentEndingIndex = self!.currentBeginningIndex + data.retailList.count - 1
self?.productsCount.value = data.retailList.count
self?.productsCollection.value.append(contentsOf: allProducts)
self?.loadingProducts.value = false
self?.currentPageNumber += 1;
self?.pageLoadFinished.value = allProducts.count >= data.totalElements
self?.partnersResultSubject.onNext(allProducts);
break;
case .error(let error):
self?.errorSubject.onNext(error as! ErrorResponse);
self?.loadingProducts.value = false
break;
default:
break;
}
}).disposed(by: disposeBag);
}
private var partnersFilterCredentionals: Observable<PartnersFilterCredentionals> {
return Observable.combineLatest(cityIDSubject.asObservable(), catIDSubject.asObservable(),pageNumberSubject.asObserver()) { cityID, catID , pageNumber in
return PartnersFilterCredentionals(cityID: cityID, catID: catID,pageNumber: pageNumber);
}
}
}
// // 我的ViewController
extension UIScrollView {
func isNearBottomEdge(edgeOffset: CGFloat = 20.0) -> Bool {
return self.contentOffset.y + self.frame.size.height + edgeOffset > self.contentSize.height
}
}
class PartnersViewController: PartnersGeneralViewController, ViewControllerSetupable, ViewControllerViewModelTypeProtocol, Stepper,UITableViewDelegate{
private var catID: Int
private var cityID: Int
private var pageNumber: Int
private var shouldShowLoadingCell = false
var currentPage = 0
typealias ViewModelType = PartnersViewModel
let viewModel: ViewModelType
private var regId = -1;
private let tableView = UITableView()
var numberOfItems: Int = 10
var activityIndicatorView: UIActivityIndicatorView
func setupSignals() {
headerView.leftLogoButton.addTarget(self, action: #selector(closeFlow), for: .touchUpInside)
filters()
viewModel.output.partnersResultObservable
.observeOn(mainScheduler)
.bind(to: tableView.rx.items(cellIdentifier: PartnersCell.defaultReuseIdentifier, cellType: PartnersCell.self)) {
row, element, cell in
cell.update(with: element);
}.disposed(by: viewModel.disposeBag);
self.activityIndicatorView.hidesWhenStopped = true
self.activityIndicatorView.startAnimating()
_ = self.viewModel.output.partnersResultObservable.asObservable().observeOn(MainScheduler.instance).subscribe(onNext: { (partners) in
print("\(self.viewModel.pageLoadFinished)")
print("First index \(self.viewModel.currentBeginningIndex) last index \(self.viewModel.currentEndingIndex) products count \(self.viewModel.productsCollection.value.count)")
self.tableView.performBatchUpdates({
var indexPathsCollection: [IndexPath] = []
if self.viewModel.currentBeginningIndex < self.viewModel.currentEndingIndex {
for i in self.viewModel.currentBeginningIndex...self.viewModel.currentEndingIndex {
indexPathsCollection.append(IndexPath(row: i, section: 0))
}
// self.tableView.insertRows(at: indexPathsCollection, with: .bottom)
self.tableView.reloadData()
}
}, completion: nil)
})
_ = Observable.combineLatest(self.viewModel.loadingProducts.asObservable(), self.viewModel.pageLoadFinished.asObservable()).observeOn(MainScheduler.instance).subscribe(onNext: { (loading, pageLoadFinished)in
if loading == true && pageLoadFinished == false {
self.activityIndicatorView.startAnimating()
} else {
self.activityIndicatorView.stopAnimating()
}
})
tableView.rx.contentOffset
.subscribe { _ in
if self.tableView.isNearBottomEdge(edgeOffset: 10) && !self.viewModel.loadingProducts.value {
// self.viewModel.loadingProducts.value = true
self.viewModel.loadPartners()
print("1111")
}
}.disposed(by: disposeBag)
}
fileprivate func filters(){
viewModel.input.catID.onNext(String(catID));
viewModel.input.cityID.onNext(String(cityID));
viewModel.input.pageNumber.onNext(String(self.viewModel.currentPageNumber))
viewModel.input.fetchingPartners.onNext(());
viewModel.currentBeginningIndex = 0
viewModel.currentEndingIndex = 0
viewModel.pageLoadFinished = Variable(false)
viewModel.productsCollection = Variable([])
tableView.reloadData()
}