将tableView保留在行选择上

Question

我正在尝试在ViewController中使用TableView作为选择器。

它是一个带有文本标签的简单表视图。

我的问题是，我不能让桌面视图继续下一个文本区域。

我已尝试使用此代码：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{


    [_textfield becomeFirstResponder];

}

但是只打开键盘，在我输入后我回到了tableview。

当我选择一行时，我该怎么做才能离开桌面视图？

故事板中的图片。

Answer 1

目标C

您需要跟踪和更新UITableViewCell子类UIFocusHeading，具体取决于是否已选择单元格以及UITableViewCell是什么。

您应该做的第一件事是在@property (nonatomic, strong) UIView *currentPreferredFocusedSubview; 子类上添加一个属性，以跟踪您想要关注的当前子视图。例如：

didSelectRowAtIndexPath

然后在- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { TableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]; [cell setSelected:NO animated:YES]; cell.currentPreferredFocusedSubview = cell.textField; [cell setNeedsFocusUpdate]; } 的视图控制器中，您应该将其设置为您想要关注的文本字段，然后请求焦点引擎更新：

UITableViewCell

现在，在preferredFocusedView子类中，您需要返回首选焦点视图，并通过覆盖shouldUpdateFocusInContext和- (UIView *)preferredFocusedView { return self.currentPreferredFocusedSubview; } - (BOOL)shouldUpdateFocusInContext:(UIFocusUpdateContext *)context { if (self.currentPreferredFocusedSubview == self.textField && context.focusHeading == UIFocusHeadingRight) { self.currentPreferredFocusedSubview = self.textField2; } else if (self.currentPreferredFocusedSubview == self.textField2 && context.focusHeading == UIFocusHeadingRight) { self.currentPreferredFocusedSubview = self.textField3; } else if (self.currentPreferredFocusedSubview == self.textField3 && context.focusHeading == UIFocusHeadingRight) { self.currentPreferredFocusedSubview = self.textField3; } else if (self.currentPreferredFocusedSubview == self.textField3 && context.focusHeading == UIFocusHeadingLeft) { self.currentPreferredFocusedSubview = self.textField2; } else if (self.currentPreferredFocusedSubview == self.textField2 && context.focusHeading == UIFocusHeadingLeft) { self.currentPreferredFocusedSubview = self.textField; } else if (self.currentPreferredFocusedSubview == self.textField && context.focusHeading == UIFocusHeadingLeft) { self.currentPreferredFocusedSubview = self.textField; } else { self.currentPreferredFocusedSubview = nil; } return true; } 来更改焦点引擎的更新方式：

preferredFocusedView

这里我们只根据焦点引擎的方向更新nil。如果向上或向下，下一行将变得集中，因为我们正在返回var currentPreferredFocusedSubview: UITextField? override var preferredFocusedView: UIView? { get{ return self.currentPreferredFocusedSubview } } override func shouldUpdateFocusInContext(context: UIFocusUpdateContext) -> Bool { switch (self.currentPreferredFocusedSubview, context.focusHeading) { case (self.textField?, UIFocusHeading.Right): self.currentPreferredFocusedSubview = self.textField2 case (self.textField2?, UIFocusHeading.Right): self.currentPreferredFocusedSubview = self.textField3 case (self.textField3?, UIFocusHeading.Right): self.currentPreferredFocusedSubview = self.textField3 case (self.textField3?, UIFocusHeading.Left): self.currentPreferredFocusedSubview = self.textField2 case (self.textField2?, UIFocusHeading.Left): self.currentPreferredFocusedSubview = self.textField case (self.textField?, UIFocusHeading.Left): self.currentPreferredFocusedSubview = self.textField default: self.currentPreferredFocusedSubview = nil } return true } 。如果向左或向右，则为相应的文本字段。这有点笨重，但这是以编程方式更新焦点视图的tvOS 9方式。

夫特

(export default (withHistory, onUpdate) => {
 const history = withHistory?
              (Modernizr.history ?
                browserHistory
              : hashHistory)
            : null;
return (
<Router history={history} onUpdate={onUpdate}>
  <Route path='/' component={App}>
    <IndexRoute component={quotes} />
    <Route path='/app/search' component={SimpleSearch} />

    <Route path='pathName' component={Blank1} />
      <Route path='pathName/:category' component={Blank1}/>
      <Route path='pathName/:category(/:page)' component={Blank1}/>
    <Route path='app/:id' component={Blank1} />

  </Route>

</Router>

);
};