resignFirstResponder不工作？

问题描述

我尝试在iPad上隐藏键盘，但我不知道为什么resignFirstResponder不起作用。
但是popToRoot运行良好。

I try to hide keyboard on iPad but I don't know why resignFirstResponder don't work.But popToRoot has work well.

- (BOOL)textFieldShouldReturn:(UITextField *)textField 
{
    NSString *desc = [NSString stringWithFormat:@"%@",[descTF text]];
    [textField resignFirstResponder];
    [self.navigationController popToRootViewControllerAnimated:YES];


    return YES;
}

那么你能指导一下我该怎么办？

So Could you guide me what should I do please ??

推荐答案

这个字段是否在 UIModalPresentationFormSheet 中？如果是这样，这是一个已知的问题，你不能以编程方式解除键盘，直到视图控制器被解除。

Is this field inside a UIModalPresentationFormSheet? If so, it's a known issue that you can not dismiss the keyboard programmatically until the view controller gets dismissed.

更新：根据此主题，可能的解决方法是从内部呈现工作表视图控件实现disablesAutomaticKeyboardDismissal方法的导航控制器子类。所以类似于：

UPDATE: according to this thread from the Apple Developer Forums, a possible workaround for this is to present the sheet view control from inside a navigation controller subclass that implements the disablesAutomaticKeyboardDismissal method. So something like:

MyViewController *myViewController = [[MyViewController alloc] initWithNibName:@"MyViewController" bundle:nil];
CustomNavigationController *navController = [[CustomNavigationController alloc] initWithRootViewController:myViewController];
theNavigationController.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:theNavigationController animated:YES];

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