定制iPhone键盘

想在你的游戏或应用程序中，改变一下你键盘的形象或定制特殊的键盘，方法很简单。我编写了一个简单程序将键盘上的Q键改为！键（由于photoshop水平有限，不是很完美，见谅！）



思路如下：

1. 键盘出现前都会系统会发出通知，我们要做的就是截取此事件，然后获得UIKeyboard对象：

1	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

2. 获取UIKeyboard对象。UIKeyboard处于UIWindow中。但是要注意的是，它并不处于当前应用程序的UIWindow中。所以我们必须通过一个循环来查找所需的UIWindow，从而获得UIKeyboard。然后替换或添加UIButton作为定制的按键：

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- (void)keyboardWillShow:(NSNotification *)notification {     UIWindow* tmpWindow;        UIView* keyboard;         // Check each window in our application     for(int i = 0; i < [[[UIApplication sharedApplication] windows] count]; i++)     {         // Get a reference of the current window         tmpWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:i];                 for(int j = 0; j < [tmpWindow.subviews count]; j++)         {             keyboard = [tmpWindow.subviews objectAtIndex:j];                         // From all the apps i have made, they keyboard view description always starts with             if([[keyboard description] hasPrefix:@"] == YES)             {                 UIButton* key = [UIButton buttonWithType:UIButtonTypeCustom];                                     // Position the button - I found these numbers align fine (0, 0 = top left of keyboard)                 key.frame = CGRectMake(2, 10, 31, 46);                                     // Add images to our button so that it looks just like a native UI Element.                 [key setImage:[UIImage imageNamed:@"key.png"] forState:UIControlStateNormal];                 [key setImage:[UIImage imageNamed:@"key-pressed.png"] forState:UIControlStateHighlighted];                                     //Add the button to the keyboard                 [keyboard addSubview:key];                                     // 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.                 [key addTarget:self action:@selector(keypressed:)  forControlEvents:UIControlEventTouchUpInside];                                     return;                             }         }     }   }

3. 捕获UIButton事件，实现你自己的逻辑。比如，在我的程序中，当用户按下！键后，我会将！输入到UITextView中：

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- (void)keypressed:(id)sender{     textView.text = [textView.text stringByAppendingString:@"!"]; }

这里是。