blocks|key|4296927|text|vc.ScheduleArray.count+-+1可能是负索引路径|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4296928|尝尝这个|4296929|if+(vc.ScheduleArray.count+-+1+>=+0){
++++vc.ScheduleTableView.insertRows(at:+[indexPath],+with:+.automatic)
}|code-block|syntax|javascript|4296930|entityMap^0|0|Q|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

<code>vc.ScheduleArray.count - 1</code> is probably a negative indexpath

try this

<pre><code>if (vc.ScheduleArray.count - 1 &gt;= 0){
 vc.ScheduleTableView.insertRows(at: [indexPath], with: .automatic)
}
</code></pre>

blocks|key|4296973|text|问题是您试图在prepare函数内部更新视图控制器。在该函数内部，视图被实例化，但它的出口尚未连接。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4296974|要解决该问题，请执行以下步骤：|4296975|在此方法中，您应该首先更新模型：|4296976|@IBAction+func+addButtonTapped(_+sender:+YTRoundedButton)+{
+++//+update+your+model+here

+++self.performSegue(withIdentifier:+"secondvc",+sender:+self)++++
}|code-block|syntax|javascript|4296977|在目标视图控制器中，您应该处理此模型更改并重新加载表视图的数据。|4296978|override+func+viewDidLoad()+{
++++self.tableView.reloadData()
}|4296979|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|T|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

The problem is that you trying to update a view controller inside of prepare function. Inside that function, the view is instantiated but it's Outlets are not connected yet. 

To solve that issue, follow these steps:

On this method you should first update your model:

<pre><code>@IBAction func addButtonTapped(_ sender: YTRoundedButton) {
 // update your model here

 self.performSegue(withIdentifier: "secondvc", sender: self) 
}
</code></pre>

In your destination view controller, you should handle this model change and reload the table view's data.

<pre><code>override func viewDidLoad() {
 self.tableView.reloadData()
}
</code></pre>

blocks|key|4297017|text|解决这个问题的方法是改变声明数组的位置(单例就可以了)，并删除了不必要的插入、更新、重新加载等操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4297018|然后，numRowsInSection方法调用scheduleArray.count以显示所有相应的数据。|4297019|之前：|4297020|@IBAction+func+addButtonTapped(_+sender:+YTRoundedButton)+{
+++self.performSegue(withIdentifier:+"secondvc",+sender:+self)

}

override+func+prepare(for+segue:+UIStoryboardSegue,+sender:+Any?)+{
++++if+segue.identifier++==+"secondvc"+{
++++++++print(TitleTextField.text!)

++++++++let+vc+=+segue.destination+as!+GrowthMainViewController

++++++++vc.ScheduleArray.append(TitleTextField.text!)
++++++++let+indexPath+=+IndexPath(row:+vc.ScheduleArray.count+-+1,+section:+0)
++++++++vc.ScheduleTableView.beginUpdates()
++++++++vc.ScheduleTableView.insertRows(at:+[indexPath],+with:+.automatic)
++++++++vc.ScheduleTableView.reloadData()
++++++++vc.ScheduleTableView.endUpdates()



++++++++TitleTextField.text+=+""
++++++++view.endEditing(true)

++}+++++
}|code-block|syntax|javascript|4297021|之后：|4297022|@IBAction+func+addButtonTapped(_+sender:+YTRoundedButton)+{
+++self.performSegue(withIdentifier:+"secondvc",+sender:+self)

}

override+func+prepare(for+segue:+UIStoryboardSegue,+sender:+Any?)+{
++++if+segue.identifier++==+"secondvc"+{

++++++++guard+let+text+=+TitleTextField.text+else+{+return+}
++++++++scheduleArray.append(text)
++++++++TitleTextField.text+=+""
++++++++view.endEditing(true)

++}+++++
}|4297023|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|T|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

The resolution for this was changing where the array was declared (singleton is fine for this), and removing the unnecessary inserting, updating, reloading, etc.

The numRowsInSection method then calls the scheduleArray.count to show all corresponding data.

Before: 

<pre><code>@IBAction func addButtonTapped(_ sender: YTRoundedButton) {
 self.performSegue(withIdentifier: "secondvc", sender: self)

}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 if segue.identifier == "secondvc" {
 print(TitleTextField.text!)

 let vc = segue.destination as! GrowthMainViewController

 vc.ScheduleArray.append(TitleTextField.text!)
 let indexPath = IndexPath(row: vc.ScheduleArray.count - 1, section: 0)
 vc.ScheduleTableView.beginUpdates()
 vc.ScheduleTableView.insertRows(at: [indexPath], with: .automatic)
 vc.ScheduleTableView.reloadData()
 vc.ScheduleTableView.endUpdates()



 TitleTextField.text = ""
 view.endEditing(true)

 } 
}
</code></pre>

After :

<pre><code>@IBAction func addButtonTapped(_ sender: YTRoundedButton) {
 self.performSegue(withIdentifier: "secondvc", sender: self)

}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 if segue.identifier == "secondvc" {

 guard let text = TitleTextField.text else { return }
 scheduleArray.append(text)
 TitleTextField.text = ""
 view.endEditing(true)

 } 
}
</code></pre>

I have two view controllers one with the 3 tableviews and other controller I have a uitextfield and the text entered in the text field I want to add it to one of the tableview called ScheduleTableView in the other view controller.
Here is my code but I get the error unexpectedly found nil while unwrapping an optional value at <code>vc.ScheduleTableView.beginUpdates()</code> 

<pre><code>@IBAction func addButtonTapped(_ sender: YTRoundedButton) {
 self.performSegue(withIdentifier: "secondvc", sender: self)

}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 if segue.identifier == "secondvc" {
 print(TitleTextField.text!)

 let vc = segue.destination as! GrowthMainViewController

 vc.ScheduleArray.append(TitleTextField.text!)
 let indexPath = IndexPath(row: vc.ScheduleArray.count - 1, section: 0)
 vc.ScheduleTableView.beginUpdates()
 vc.ScheduleTableView.insertRows(at: [indexPath], with: .automatic)
 vc.ScheduleTableView.reloadData()
 vc.ScheduleTableView.endUpdates()



 TitleTextField.text = ""
 view.endEditing(true)

 } 
}
</code></pre>

UITableView add row from other Viewcontroller

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我有两个视图控制器，一个有3个表视图，另一个控制器，我有一个uitextfield和在文本字段中输入的文本，我想把它添加到另一个视图控制器的一个名为ScheduleTableView的表视图中。以下是我的代码，但在vc.ScheduleTableView.beginUpdates()处展开可选值时，我收到错误:意外发现...

问UITableView从其他视图控制器添加行
EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问UITableView从其他视图控制器添加行EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问UITableView从其他视图控制器添加行
EN