Question

我有一个应用，该应用使用从api调用接收到的一些属性填充uitableview。因此，我的问题是我如何才能使第一个cell例如具有名称“ Back”和一些图像，然后再使用从api调用接收的属性填充其他cells？如果有人可以发表一些例子，那就太棒了。

Answer 1

您可以尝试

 override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = UITableViewCell(style: .default, reuseIdentifier: "CellId")
   switch indexPath.row {
    case 0:
        cell.textLabel!.text = "back"
        cell.imageView?.image = UIImage(named: "back.png")
        break
    default:
        cell.textLabel!.text =  array[indexPath.row - 1]
        break
    }
   retun cell
 }

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return arrayCount + 1
}

Answer 2

Maybe what you want is not a first cell that can be scrolled out together with the other cells, but a header that stays at its place while the other cells scroll. If this is the case, you could use:

override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    return "Section \(section)"
}

This creates a simple text header.

If you want to use a custom header, you had to define a header view:

override func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let view = UIView() // Here you had to use a view that you set up earlier
    return view
}

These headers can be created for every section of your table.

EDIT:

I implemented a simple tableView project, and added the code provided by Simke in his/her comments.

import Foundation
import UIKit

class TableViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 3
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell")!
        cell.textLabel?.text = "Title"
        return cell
    }

    override func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView?  { 
        let vw = UIView() 
        vw.frame.size.height = 40 
        let btnBk = UIButton(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: vw.frame.height)) 
        btnBk.backgroundColor = .blue 
        btnBk.setTitle("back", for: .normal) 
        btnBk.addTarget(self, action: #selector(btnAct), for: .touchUpInside) 
        vw.addSubview(btnBk) 
        return vw 
    } 

    @objc func btnAct(sender: UIButton!){ 
        print("a") 
    } 
}

Here, the button in the header view works, i.e. "a" is printed in the logs.

Answer 3

首先将表格视图分为两部分。

第0节：在此处出队您的自定义必需单元格。

第1部分：在此处使用来自API的数据来缓存自定义单元格。

代码示例：

 extension ProjectDetailViewController: UITableViewDataSource {

    func numberOfSections(in tableView: UITableView) -> Int {
        return 2
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        switch section {
        case 0:
            //deque your cell you want to place before data from API
        case 1:
            //deque data from api here
        case default:
            break
        }
    }

注意：请记住从API获取数据后重新加载表格视图

如何使第一行具有特定的名称和图像？

3 个答案: