告诉 UITextField 在嵌入 UITableViewCell 时成为第一响应者

发布于 2024-08-11 03:33:52 字数 391 浏览 7 评论 0原文

我有一个 UITextField，它是 UITableViewCell 的子视图。

当我的视图加载时，我希望文本字段成为第一响应者。我有一个指向表格单元格中文本字段的指针，因此为了执行此操作，我正在尝试：

[myTextField becomeFirstResponder];

无论何时调用它，它始终返回 NO ，根据文档，这意味着文本字段拒绝成为第一响应者...我做错了什么？

编辑：

textfield 正确响应被触摸。然后它会调出键盘。只有当以编程方式告诉它becomefirstresponder时才会出现问题。

原文

I have a UITextField that is a subview of a UITableViewCell.

When my view loads, I want the text field to become first responder. I have a pointer to the text field in the table cell, so to do this I am trying:

[myTextField becomeFirstResponder];

This returns NO all the time, regardless of when it's called, which according to the docs means the text field refused to become first responder... What am I doing wrong?

Edit:

The textfield properly responds to being touched. It bring up the keyboard then. It's only when telling it to becomefirstresponder programmatically that the problem happens.

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

此刻的回忆 2024-08-18 03:33:52

事实证明，当我尝试将其发送给第一响应者时，文本字段为零。
在生命周期的后期发送 becomeFirstResponder 是有效的。

回复收藏 0 原文

╰ゝ天使的微笑 2024-08-18 03:33:52

我对作为子视图添加到分组表视图单元格的文本字段遇到了同样的问题 - 但经过一番摸索后找到了解决方案。

假设您已在 cellForRowAtIndexPath 方法中为文本字段指定了标签，则可以执行以下操作：

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];

    myTextField = (UITextField *)[cell viewWithTag:kMyTextFieldTag];
    [myTextField becomeFirstResponder];
}

I was having the same problem with a textfield I had added as a subview to a grouped table view cell - but figured out a solution after some poking around.

Assuming you have given the textfield a tag in your cellForRowAtIndexPath method, you can do something like this:

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];

    myTextField = (UITextField *)[cell viewWithTag:kMyTextFieldTag];
    [myTextField becomeFirstResponder];
}

回复收藏 0 原文

小伙你站住 2024-08-18 03:33:52

在 -(void)viewDidLoad 中调用它就可以了。

-(void)viewDidLoad{
   [super viewDidLoad];
   // Do any additional setup after loading the view.
   [self.myTextField becomeFirstResponder] 

   //... any other code you need 
}

Calling it in the -(void)viewDidLoad would work.

-(void)viewDidLoad{
   [super viewDidLoad];
   // Do any additional setup after loading the view.
   [self.myTextField becomeFirstResponder] 

   //... any other code you need 
}

回复收藏 0 原文