大佬教程收集整理的这篇文章主要介绍了在 iPhone/iPad 中随意修改数字键盘按钮,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
一、起因
iPhone 的键盘,特别是数字键盘,往往不能满足程序的输入需要。最典型的例子就是在数字键盘上添加一个“.”,用来输入小数点。安装 iPhone SDK 官方的观点,如果要使用小数点键盘,那只好使用数字和符号键盘,但那样没个按键很小,且不需要的按键太多。
二、现有方案
针对这种情况,最早的解决方案,请参考这里:http://www.cnblogs.com/mac_arthur/archive/2010/05/18/1738363.html。使用的是 以下代码来检测一个 Notification。
这种方法,在 iOS 4.0 后失效了,原因有两个,一是UIKeyboardWillShowNotification的时候,键盘根本没有创建出来;另外,Class Name 也被外包了一层,叫做UIPeripheralHostView。
于是又有了一种改进的方案,请看这里:http://www.neoos.ch/news/46-development/54-uikeyboardtypenumberpad-and-the-missing-return-key。主要的改进是在UIKeyboardDidShowNotification的通知消息中来修改键盘。但正如作者所说,这里有个不完美的情况,只能等键盘动画显示完成之后,才能添加显示我们的东西,视觉效果不好。
三、改进方案
经过试验,找到一个比较完美的方案:在 UITextField 的becomeFirstResponder和resignFirstResponder中修改键盘。
定以一个类,假如叫做 KBCustomTextField : UITextField,在这个类中加入一下代码:
modifyKeyView 的实现可以参看附件。我使用的是循环查找UIKBKeyView类,这是Apple 的 Private API(私有API的声明可以在这里找:http://github.com/kennytm/iphone-private-frameworks/tree/master/UIKit/),不确信能否通过 App Store 的审核:)
更近一步地,我完善了一下 KBCustomTextField,通过这个类,非常方便地就可以做到自定义输入键盘:
1. 使用小数点和数字键盘:非常简单,只要在 IB 中把 UITextField 的类改成KBCustomTextField,就OK了,不用一行代码,效果如下图:
2. 在键盘的按键上添加一个文字按钮(并指定处理动作):设置KBCustomTextField.kbDelegate,实现这两个函数即可:
引用
// [Yonsm] Handle keyboard show
- (void)keyboardShow:(KBCustomTextField *)sender
{
[sender addCustomButton:@"numberPad-Empty" title:@"DONE" target:self action:@SELEctor(onButton:)];
}
// [Yonsm] Handle keyboard hide
- (void)keyboardHide:(KBCustomTextField *)sender
{
[sender delCustomButton:@"numberPad-Empty"];
}
下面是 iPhone 数字键盘的前面10个按键(后面忘了打出来了:) 引用 Found View: UIPeripheralHostView Found View: UIKeyboardAutomatic Found View: UIKeyboardImpl Found View: UIKeyboardLayoutStar Found View: UIKBKeyplaneView Found View: UIKBKeyView NAME=numberPad-1 representedString=1 displayString=1 displayType=numberPad interactionType=String displayRowHint=Row1 Found View: UIKBKeyView NAME=numberPad-2 representedString=2 displayString=2/ABC displayType=numberPad interactionType=String displayRowHint=Row1 Found View: UIKBKeyView NAME=numberPad-3 representedString=3 displayString=3/DEF displayType=numberPad interactionType=String displayRowHint=Row1 Found View: UIKBKeyView NAME=numberPad-4 representedString=4 displayString=4/GHI displayType=numberPad interactionType=String displayRowHint=Row2 Found View: UIKBKeyView NAME=numberPad-6 representedString=6 displayString=6/MNO displayType=numberPad interactionType=String displayRowHint=Row2 Found View: UIKBKeyView NAME=numberPad-7 representedString=7 displayString=7/PQRS displayType=numberPad interactionType=String displayRowHint=Row3 Found View: UIKBKeyView NAME=numberPad-8 representedString=8 displayString=8/TUV displayType=numberPad interactionType=String displayRowHint=Row3 Found View: UIKBKeyView NAME=numberPad-9 representedString=9 displayString=9/WXYZ displayType=numberPad interactionType=String displayRowHint=Row3 Found View: UIKBKeyView NAME=numberPad-Empty representedString= displayString= displayType=numberPad interactionType=None displayRowHint=Row4 代码对 iPad 也有效,当然 Key Name 和 Type 不一样,下面是 iPad 数字键盘的Log: 引用Found View: UIPeripheralHostView Found View: UIKeyboardAutomatic Found View: UIKeyboardImpl Found View: UIKeyboardLayoutStar Found View: UIKBKeyplaneView Found View: UIKBKeyView NAME=Digit-1 representedString=1 displayString=1 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-2 representedString=2 displayString=2 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-3 representedString=3 displayString=3 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-4 representedString=4 displayString=4 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-5 representedString=5 displayString=5 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-6 representedString=6 displayString=6 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-7 representedString=7 displayString=7 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-8 representedString=8 displayString=8 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-9 representedString=9 displayString=9 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Digit-0 representedString=0 displayString=0 displayType=String interactionType=String-Popup displayRowHint=Row1 Found View: UIKBKeyView NAME=Hyphen-Minus representedString=- displayString=- displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Solidus representedString=/ displayString=/ displayType=String interactionType=String-Popup displayRowHint=Row2 Found View: UIKBKeyView NAME=Colon representedString=: displayString=: displayType=String interactionType=String-Popup displayRowHint=Row2 Found View: UIKBKeyView NAME=Semicolon representedString=; displayString=; displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Left-Parenthesis representedString=( displayString=( displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Right-Parenthesis representedString=) displayString=) displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=PriMary-Currency-Sign representedString=$ displayString=$ displayType=DynamicString interactionType=String-Popup Found View: UIKBKeyView NAME=Ampersand representedString=& displayString=& displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Commercial-At representedString=@ displayString=@ displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Full-Stop representedString=. displayString=. displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Comma representedString=, displayString=, displayType=String interactionType=String-Popup displayRowHint=Row3 Found View: UIKBKeyView NAME=Question-Mark representedString=? displayString=? displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Exclamation-Mark representedString=! displayString=! displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Apostrophe representedString=' displayString=’ displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=Quotation-Mark representedString=" displayString=” displayType=String interactionType=String-Popup Found View: UIKBKeyView NAME=delete-Key representedString=delete displayString=delete displayType=delete interactionType=delete Found View: UIKBKeyView NAME=Return-Key representedString= interactionType=Return displayRowHint=Row2 Found View: UIKBKeyView NAME=Undo-Key representedString=undo displayString=undo displayType=Command interactionType=Undo displayRowHint=Row3 Found View: UIKBKeyView NAME=More-Key representedString=More displayString=more displayType=More interactionType=More displayRowHint=Row4 Found View: UIKBKeyView NAME=Unlabeled-Space-Key representedString= displayString= displayType=Space interactionType=Space Found View: UIKBKeyView NAME=More-Key representedString=More displayString=more displayType=More interactionType=More displayRowHint=Row4 Found View: UIKBKeyView NAME=Dismiss-Key representedString=Dismiss displayString=Dismiss displayType=Dismiss interactionType=Dismiss Found View: UIKBKeyView NAME=Shift-Key representedString=Shift displayString=shift displayType=Shift interactionType=Shift displayRowHint=Row3 Found View: UIKBKeyView NAME=Shift-Key representedString=Shift displayString=shift displayType=Shift interactionType=Shift displayRowHint=Row3
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