keyboard - 如何在 ios 8 中获取键盘位置并在数字键盘上添加“完成”按钮

Question

我使用下面的代码从 View 中获取键盘位置并在其上添加“完成”按钮。但在 ios 8 中，它无法获取键盘位置，因此无法添加“完成”按钮。

UIWindow *tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];

UIView *keyboard;

for (int i = 0; i < [tempWindow.subviews count]; i++)
{
    keyboard = [tempWindow.subviews objectAtIndex:i];
    // keyboard view found; add the custom button to it

    if ([[keyboard description] hasPrefix:@"<UIPeripheralHostView"] == YES)
    {
        [keyboard addSubview:doneButton];
    }
}

Answer 1

下面的代码也用于在 NumberPad iOS 8 上显示 “完成” 按钮。 我在 XCode-5.1.1 中使用 iOS 6/7/8 设备 运行此代码。它工作完美。

我从这个链接Can't find keyplane that supports type 4 for keyboard iPhone-Portrait-NumberPad获取引用给出了数字键盘上添加按钮的一些代码。

@property (nonatomic, retain) UIButton *doneButton;

添加按钮

- (void)addButtonToKeyboard
{
    if (!self.doneButton)
    {
        self.doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [self.doneButton addTarget:self action:@selector(doneButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
    }
    self.doneButton.adjustsImageWhenHighlighted = NO;
    [self.doneButton setTitle:@"DONE" forState:UIControlStateNormal];
    [self.doneButton.titleLabel setFont:[UIFont systemFontOfSize:16.0]];
    [self.doneButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [self.doneButton setTitleColor:[UIColor blackColor] forState:UIControlStateHighlighted];

    // locate keyboard view
    if ([[[UIApplication sharedApplication] windows] count] <= 1) return;
    UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
    UIView* keyboard;
    for(int i=0; i<[tempWindow.subviews count]; i++)
    {
        keyboard = [tempWindow.subviews objectAtIndex:i];
        // keyboard found, add the button
        if ([[keyboard description] hasPrefix:@"<UIPeripheralHost"] == YES)
        {
            BOOL isPortrait = UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation);
            self.doneButton.frame = CGRectMake(((isPortrait)?0:-1),((int) (keyboard.frame.size.height*3)/4) + ((isPortrait)?0:1),(int) keyboard.frame.size.width/3-1, (isPortrait)?60:40);
            [keyboard addSubview:self.doneButton];
        }
        //This code will work on iOS 8.0
        else if([[keyboard description] hasPrefix:@"<UIInputSetContainerView"] == YES)
        {
            for(int i = 0 ; i < [keyboard.subviews count] ; i++)
            {
                UIView* hostkeyboard = [keyboard.subviews objectAtIndex:i];
                if([[hostkeyboard description] hasPrefix:@"<UIInputSetHost"] == YES)
                {
                    BOOL isPortrait = UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation);
                    self.doneButton.frame = CGRectMake(((isPortrait) ? 0 : -1),((int) (hostkeyboard.frame.size.height*3)/4) + ((isPortrait) ? 0 : 1),(int) hostkeyboard.frame.size.width/3-1, (isPortrait) ? 60 : 40);
                    [hostkeyboard addSubview:self.doneButton];
                }
            }
        }
        else{}
    }
}

从键盘中删除按钮

- (void)removeButtonFromKeyboard
{
    NSArray *arTemp = [[UIApplication sharedApplication] windows];
    if ([arTemp count] <= 1) return;
    UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
    UIView* keyboard;
    for(int i=0; i<[tempWindow.subviews count]; i++)
    {
        keyboard = [tempWindow.subviews objectAtIndex:i];
        // keyboard found, add the button
        if ([[keyboard description] hasPrefix:@"<UIPeripheralHost"] == YES)
        {
            for (id temp in keyboard.subviews)
            {
                if ([temp isKindOfClass:[UIButton class]])
                {
                    UIButton *btnDone = (UIButton*) temp;
                    [btnDone removeFromSuperview];
                    break;
                }
            }
        }
        //This code will work on iOS 8.0
        else if([[keyboard description] hasPrefix:@"<UIInputSetContainerView"] == YES)
        {
            for(int i = 0 ; i < [keyboard.subviews count] ; i++)
            {
                UIView* hostkeyboard = [keyboard.subviews objectAtIndex:i];
                if([[hostkeyboard description] hasPrefix:@"<UIInputSetHost"] == YES)
                {
                    for (id temp in hostkeyboard.subviews)
                    {
                        if ([temp isKindOfClass:[UIButton class]])
                        {
                            UIButton *btnDone = (UIButton*) temp;
                            [btnDone removeFromSuperview];
                            break;
                        }
                    }
                }
            }
        }
        else{}
    }
}

有任何问题请告诉我。

更新: 在 iOS 7.1 真实设备上进行测试 - 除非键盘显示动画完成，否则不会添加按钮。下面的代码添加了键盘完全可见后添加按钮的延迟:

-(void)textFieldDidBeginEditing:(UITextField *)textField
{
    [self performSelector:@selector(addButtonToKeyboard) withObject:nil afterDelay:0.75];

}