Question

我使用情节提要设计了一个自定义表格视图。当应用程序在模拟器或iPhone上运行时，更改不会显示。它仍然显示表格视图的最新版本，其中没有静态单元格。

我尝试删除 / Users / xxx / Library / Developer / Xcode / DerivedData 目录，清理构建文件夹，删除iPhone上的应用程序，然后再次运行，然后重新启动iPhone。什么都没有。

代码如下：

import UIKit

class NewDebtViewController: UITableViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    // Uncomment the following line to preserve selection between presentations
    // self.clearsSelectionOnViewWillAppear = false

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem


    let saveText = NSLocalizedString("Save", comment: "Save")

    self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: saveText, style: .done, target: self, action: #selector(saveDebt))
}

//Function to go back
@objc func saveDebt(){

    //Here the code for saving the New Debt

    //print("Back Button Clicked")
    _ = navigationController?.popViewController(animated: true)
}

// MARK: - Table view data source

override func numberOfSections(in tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 0
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return 0
}

/*
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier", for: indexPath)

    // Configure the cell...

    return cell
}
*/

/*
// Override to support conditional editing of the table view.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
    // Return false if you do not want the specified item to be editable.
    return true
}
*/

/*
// Override to support editing the table view.
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
    if editingStyle == .delete {
        // Delete the row from the data source
        tableView.deleteRows(at: [indexPath], with: .fade)
    } else if editingStyle == .insert {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }    
}
*/

/*
// Override to support rearranging the table view.
override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {

}
*/

/*
// Override to support conditional rearranging of the table view.
override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
    // Return false if you do not want the item to be re-orderable.
    return true
}
*/

/*
// MARK: - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    // Get the new view controller using segue.destination.
    // Pass the selected object to the new view controller.
}
*/

还有什么要检查或做什么？

Runtime Hierarchy

Answer 1

已解决。尽管我正在情节提要中设计类的委托代码，但在逻辑上返回0的行数在iPhone中没有行：

这是邪恶代码，已被注释以解决问题。 //标记：-表格视图数据源

override func numberOfSections(in tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 1
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return 4
}

这是运行时的屏幕截图： iPhone Runtime

为什么在Xcode Storyboard中所做的更改未反映在模拟器/设备上？

1 个答案: