RxSwift，RxDataSources:如何使用RxDataSources将动态数据绑定到UITableView?

Question

通过以下代码将一些数据绑定到 UITableView 后：

struct CustomData {
var anInt: Int
var aString: String
var aCGPoint: CGPoint
}
struct SectionOfCustomData {
var header: String
var items: [CustomData]
}
extension SectionOfCustomData: SectionModelType {
init(original: SectionOfCustomData, items: [CustomData]) {
self = original
self.items = items
}
}

class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
let disposeBag = DisposeBag()
var data: RxTableViewSectionedReloadDataSource<SectionOfCustomData>?

override func viewDidLoad() {
super.viewDidLoad()
let x = status.asObservable()
tableView.register(UINib(nibName: "TableViewCell", bundle: nil), forCellReuseIdentifier: "Cell")
tableView.register(UINib(nibName: "TableViewCellTwo", bundle: nil), forCellReuseIdentifier: "Cell2")

data = RxTableViewSectionedReloadDataSource<SectionOfCustomData>(configureCell: { dataSource, tableView, indexPath, item in
if indexPath.section > 0 {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell2", for: indexPath) as! TableViewCellTwo
cell.age.text = "(item.anInt)"
return cell
}else {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! TableViewCell
cell.name.text = item.aString
cell.age.text = "(item.anInt)"
return cell
}
})
sections = [
SectionOfCustomData(header: "First section", items: [CustomData(anInt: 0, aString: "zero", aCGPoint: CGPoint.zero), CustomData(anInt: 1, aString: "one", aCGPoint: CGPoint(x: 1, y: 1)) ]),
SectionOfCustomData(header: "Second section", items: [CustomData(anInt: 2, aString: "two", aCGPoint: CGPoint(x: 2, y: 2)), CustomData(anInt: 3, aString: "three", aCGPoint: CGPoint(x: 3, y: 3)) ])
]
Observable.just(sections)
.bind(to: tableView.rx.items(dataSource: data!))
.disposed(by: disposeBag)

按下按钮并调用函数后，我更改了部分 var 中的数据：

@IBAction func change(_ sender: UIButton) {
sections = [
SectionOfCustomData(header: "third section", items: [CustomData(anInt: 4, aString: "four", aCGPoint: CGPoint.zero), CustomData(anInt: 5, aString: "five", aCGPoint: CGPoint(x: 1, y: 1)) ]),
SectionOfCustomData(header: "fourth section", items: [CustomData(anInt: 6, aString: "six", aCGPoint: CGPoint(x: 2, y: 2)), CustomData(anInt: 7, aString: "seven", aCGPoint: CGPoint(x: 3, y: 3)) ])
]

但是在调用函数 UITableView 数据不变后，我的问题是为什么将部分变量绑定到 UITableView 并更改其中的数据(部分(后，UITableView 仍然显示最后一个数据？

Answer 1

因为变化没有进入可观察量。您需要的是遵循 -

// in class body
var dataSubject = PublishSubject<[SectionOfCustomData]>()
// in viewDidLoad() method
dataSubject
.bind(to: tableView.rx.items(dataSource: data!))
.disposed(by: disposeBag)
dataSubject.onNext([ /* your initial sections */ ])
// in change() method
dataSubject.onNext([ /* your new sections */ ])