TextField 不会使用 UIModalPresentationFormSheet 视图放弃第一响应者
我在一个 viewController 上创建了一个按钮，该按钮使用 UIModalPresentationFormSheet 演示文稿样式以模态方式加载另一个视图。在此加载的视图上，我有两个文本字段，并且我强制第一个文本字段成为第一响应者，以便键盘将立即与新视图一起出现。我已经将文本字段设置为具有连接到“退出时结束”事件的操作方法。但是，每当我在任一文本字段上按键盘上的“返回”键时，键盘都无法消失（这是我的代码）：
// addCustomPage method that is called when button from original view is touched
- (IBAction) addCustomPage:(id)sender
{
NSLog(@"Adding Custom Page");
if (!self.customPageViewController)
{
self.customPageViewController =
[[CustomPageViewController alloc] initWithNibName:@"CustomPageViewController" bundle: nil];
}
customPageViewController.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:customPageViewController animated:YES];
// force keyboard to appear with loaded page on the first textField
[customPageViewController.firstTextField becomeFirstResponder];
}
@interface CustomPageViewController : UIViewController
@property (strong, nonatomic) IBOutlet UITextField *firstTextField;
@property (strong, nonatomic) IBOutlet UITextField *secondTextField;
- (IBAction)keyboardEndOnExit:(id)sender; // DID END ON EXIT EVENT
@end
//in CustomPageViewController.m
-(IBAction)keyboardEndOnExit:(id)sender
{
[sender resignFirstResponder];
}
这是一个相当简单的问题，并且我通常可以使用这种技术与基本视图来关闭键盘和文本字段。我不确定使用这种演示格式的视图或设置是否会使事情有所不同。谢谢！
I've created a button on one viewController that loads another view modally using the UIModalPresentationFormSheet presentation style. On this loaded view, I have two textFields, and I'm forcing the first textField to be first responder so that the keyboard will appear immediately with the new view. I've set up the textFields to have an action method that is hooked up to "Did End on Exit" event. However, whenever I hit "return" on the keyboard for either textField, the keyboard fails to go away (Here is my code):
// addCustomPage method that is called when button from original view is touched
- (IBAction) addCustomPage:(id)sender
{
NSLog(@"Adding Custom Page");
if (!self.customPageViewController)
{
self.customPageViewController =
[[CustomPageViewController alloc] initWithNibName:@"CustomPageViewController" bundle: nil];
}
customPageViewController.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:customPageViewController animated:YES];
// force keyboard to appear with loaded page on the first textField
[customPageViewController.firstTextField becomeFirstResponder];
}
@interface CustomPageViewController : UIViewController
@property (strong, nonatomic) IBOutlet UITextField *firstTextField;
@property (strong, nonatomic) IBOutlet UITextField *secondTextField;
- (IBAction)keyboardEndOnExit:(id)sender; // DID END ON EXIT EVENT
@end
//in CustomPageViewController.m
-(IBAction)keyboardEndOnExit:(id)sender
{
[sender resignFirstResponder];
}
This is a fairly straight forward problem, and I have no problem normally dismissing keyboards using this technique with basic views and textFields. I'm not sure if using a view in this presentation format, or set up makes things different. Thanks!
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您已经确认您的keyboardEndOnExit方法实际上被调用了？
您还可以采取更直接的方法，在用户执行特定操作（例如按下某个键等）时调用 [yourTextView resignFirstResponder]。我仍然会使用断点或日志检查是否曾经调用过该方法。
You have confirmed that you keyboardEndOnExit method is actually being called?
You could also take a more direct approach by calling [yourTextView resignFirstResponder] when a specific action is take by the user, such as a key pressed etc. I would still check if that method is ever being called using breakpoints or a log.
看看 这个问题。很确定这是由 UIModalPresentationFormSheet 引起的相同问题。
Have a look at this question. Pretty sure it is the same problem caused by UIModalPresentationFormSheet.