How to hide inputAccessoryView without dismissing

问题:

I am using a toolbar in the inputAccessoryView property of a textView. When the keyboard shows, it displays the toolbar as expected. When the device is rotated I want to remove the toolbar. I tried:

 myTextView.inputAccessoryView.hidden = !layoutIsPortrait;

This does hide the toolbar, but leaves the outline of the taller keyboard behind. The keyboard is apparently still sized to fit the toolbar. It looks bad and interferes with touch events of underlying responders.

 myTextView.inputAccessoryView = nil;

Works only if I resignFirstResponder, then becomeFirstResponder again. This is not acceptable. I lose the cursor placement and content of the textView, keyboard flashes out and back.

[myTextView.inputAccessoryView removefromSuperview];

Does nothing at all. I saved a reference to the toolbar in a iVar and addressed that instead,

[myIvarReference removeFromSuperview];

That works, but again the taller outline of the keyboard is faintly visible. This time it does not interfere with touches of other views. So now this is a working solution but visually unacceptable. What else can I try to show and hide the inputAccessoryView at will?

Screenshot- the faint line above the keyboard is remnant of the removed toolbar

回答1:

myTextView.inputAccessoryView = nil;
[myTextView reloadInputViews];

This removes the toolbar from the view and reloads the view. This way you don't need to call resignFirstResponder and becomeFirstResponder. Additionally, this will still keep your cursor placement and content.

回答2:

For me Eric's solution never actually reset the frame or the touch areas. Presumably it's a bug with how Apple handles things. However, I found a workaround that solved the problem for me. When I set a new inputAccessoryView without a frame, reloadInputViews worked fine:

myTextView.inputAccessoryView = [[UIView alloc] initWithFrame: CGRectZero];
[myTextView reloadInputViews];

回答3:

None of the answers above were working for me and reloadInputViews was causing weird issues. Eventually I got it to show and hide and have touches passthrough by doing:

Hide it:

[textview.inputAccessoryView setHidden:YES];
[textview.inputAccessoryView setUserInteractionEnabled:NO];

Show it:

[textview.inputAccessoryView setHidden:NO];
[textview.inputAccessoryView setUserInteractionEnabled:YES];

回答4:

Never found a way to alter the frame of the keyboard. Ultimately decided to forego the inputAccessoryView, add my toolbar directly to the view as a subview and animate it myself along with the keyboard directly. This keeps the two independent and so, no more line.

回答5:

Xamarin code is

Control.InputAccessoryView = new UIView(CGRect.Empty);
Control.ReloadInputViews();

回答6:

Oddly enough, none of these approaches worked in my case.

I have a searchcontroller which pops up a standard Apple iOS keyboard if a particular search scope is selected, and a custom keyboard view with a collection view as the input field in cases of other scopes being selected. In both cases, an undesired accessory view was drawn on the screen when the input view was displayed.

So,

self.mySearch.searchbar.inputAccessoryView = nil // did not work

[self.mySearch.searhbar.inputAccessoryView setHidden:YES] // did not work

self.mySearch.inputAccessoryView = nil  // did not work

self.mySearch.searchbar.inputAccessoryView.frame = CGRectZero //did not work

[self.mySearch reloadInputViews]

and various combinations thereof etc, etc.

What did work was to delete to individual accessory items from the accessory view:

 // insert after assignments of mySearch delegates
UITextInputAssistantItem *junk = [self.mySearch inputAssistantItem];
junk.leadingBarButtonGroups = @[];
junk.trailingBarButtonGroups = @[];

回答7:

Based on Eric Appel's answer:

myTextView.inputAccessoryView = nil;
[myTextView reloadInputViews];
hideInputAccessoryView = YES;

Further modify:

- (BOOL)canBecomeFirstResponder
{
    BOOL showInputAccessoryView = YES;

    if (hideInputAccessoryView)
        showInputAccessoryView = NO;

    return showInputAccessoryView;
}

This should hide InputAccessoryView even when the keyboard is resigned.

回答8:

mTextView.inputAccessoryView = [[UIView alloc] initWithFrame:CGRectZero];
[mTextView reloadInputViews];

works for me, setting inputAccessoryView to nil will not work, I just don't know why.