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比较一个结构的两个值并在uiTableView Swift 4.0中获取额外单元格

uitableview swift ios

Audrey Rozario · 技术社区 · 7 年前

我的代码包含一个TableView,我试图比较一个结构中的两个值,它给了我数组的总数,同时它甚至打印了包含甚至不需要的额外单元格的比较数据。我想比较cellid和cellid2值,如果它们匹配,那么它应该只打印那些单元格!!!有人能帮我解决这个错误吗

import UIKit

struct One {
    let cellID: String
    let name: String
    let lastName: String
    let cellID2: String
}

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
    var arrayOne = [One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "1"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "1"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "2"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "1"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "2"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "1")]

    @IBOutlet weak var compareTableView: UITableView!

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return arrayOne.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "CompareTableViewCell") as! CompareTableViewCell
        let arrayID = arrayOne[indexPath.row]
        if arrayID.cellID == arrayID.cellID2{
            cell.lblOne.text = arrayID.cellID
            cell.lblTwo.text = arrayID.cellID2
            cell.lblThree.text = arrayID.lastName
            cell.lblFour.text = arrayID.name
        }
        return cell
    }

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 80
    }
}

1 回复 | 直到 7 年前

nayem 7 年前

首先,您应该从不希望在表视图中显示的数组中筛选出元素。然后,您将对数据源使用筛选后的数组。你不必写在你的 cellForRowAt:.. 功能。

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
    let arrayOne = [One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "1"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "1"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "2"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "1"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "2"), One(cellID: "1", name: "hello", lastName: "hello last", cellID2: "1")]

    var filteredArray = [One]()

    @IBOutlet weak var compareTableView: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Here you apply your filter
        filteredArray = arrayOne.filter { $0.cellID == $0.cellID2 }
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return filteredArray.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "CompareTableViewCell") as! CompareTableViewCell
        let arrayID = filteredArray[indexPath.row]
        // Feed your cell
        return cell
    }
}