如何在Messages.app中移動iPhone鍵盤？

Question

可能重複：
iMessage Style Receding Keyboard in an iOS App

在iOS5的消息應用程序，您可以將您的手指按住鍵盤上滑動，把它上下。這也是在AppStore的iA Writer應用程序中完成的。我如何在代碼中這樣做，即訪問和修改UIKeyboard的Y位置？

Answer 1

爲什麼另起爐竈？有跡象表明，模擬天生的messages.app後退鍵盤幾個可用的開源項目：

1. http://cocoacontrols.com/platforms/ios/controls/madismissivetextview

2. http://cocoacontrols.com/platforms/ios/controls/dakeyboardcontrol

3. http://cocoacontrols.com/platforms/ios/controls/imessagekeyboardeffect

僅舉幾例。

Answer 2

沒有方法做到這一點，但你可以直接修改鍵盤的框架是這樣的：

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]; 

    //Get a reference of the current view 
    for(int i = 0; i < [tempWindow.subviews count]; i++) 
    { 
     keyboard = [tempWindow.subviews objectAtIndex:i]; 

     if([[keyboard description] hasPrefix:@"(lessThen)UIKeyboard"] == YES) 
     { 
      //If we get to this point, then our UIView "keyboard" is referencing our keyboard. 
     } 
    } 
}