为 iPhone 创建自定义 UIKeyBoard

Question

如果有人有 GymBuddy 应用程序，那么他们就会知道我在说什么。他们似乎使用普通的数字键盘，但添加了一个“。”左下角的按钮以及顶部的栏可切换到字母字符。有谁知道该怎么做？我是否创建一个像键盘一样的新视图并将其拉起并使按钮对应于用于输入的文本字段？我似乎找不到任何有关自定义键盘或创建自己的键盘的信息。谢谢

Answer 1

我已经做到了。基本上，您将自己的按钮添加为 UIKeyboard 的子视图，如下所示：

// This function is called each time the keyboard is going to be shown
- (void)keyboardWillShow:(NSNotification *)note {

// Just used to reference windows of our application while we iterate though them
UIWindow* tempWindow;

// Because we cant get access to the UIKeyboard throught the SDK we will just use UIView. 
// UIKeyboard is a subclass of UIView anyways
UIView* keyboard;

// Check each window in our application
for(int c = 0; c < [[[UIApplication sharedApplication] windows] count]; c ++)
{
    // Get a reference of the current window
    tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:c];

    // Loop through all views in the current window
    for(int i = 0; i < [tempWindow.subviews count]; i++)
    {
        // Get a reference to the current view
        keyboard = [tempWindow.subviews objectAtIndex:i];

        // From all the apps i have made, they keyboard view description always starts with <UIKeyboard so I did the following
        if([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)
        {
            // Only add the Decimal Button if the Keyboard showing is a number pad. (Set Manually through a BOOL)
            if (numberPadShowing && [keyboard viewWithTag:123] == nil) {

                // Set the Button Type.
                dot = [UIButton buttonWithType:UIButtonTypeCustom];

                // Position the button - I found these numbers align fine (0, 0 = top left of keyboard)
                dot.frame = CGRectMake(0, 163, 106, 53);
                dot.tag = 123;

                // Add images to our button so that it looks just like a native UI Element.
                [dot setImage:[UIImage imageNamed:@"dotNormal.png"] forState:UIControlStateNormal];
                [dot setImage:[UIImage imageNamed:@"dotHighlighted.png"] forState:UIControlStateHighlighted];

                //Add the button to the keyboard
                [keyboard addSubview:dot];

                // When the decimal button is pressed, we send a message to ourself (the AppDelegate) which will then post a notification that will then append a decimal in the UITextField in the Appropriate View Controller.
                [dot addTarget:self action:@selector(sendDecimal:)  forControlEvents:UIControlEventTouchUpInside];

                return;
            }
            else if (numberPadShowing && [keyboard viewWithTag:123])
            {
                [keyboard bringSubviewToFront:dot];
            }
            else if (!numberPadShowing)
            {

                for (UIView *v in [keyboard subviews]){
                    if ([v tag]==123)
                        [v removeFromSuperview];
                }
            }
        }
    }
}
}

 - (void)sendDecimal:(id)sender {
// The decimal was pressed

}

希望这一点很清楚。

-奥斯卡

Answer 2

检查这篇文章，这可能是你的答案：

UIKeyboardTypeNumberPad 和缺少的“返回”键