使用 inputAccessoryView 强制打开时键盘行为？

Question

我有一个设备连接到我的 iPad，充当外部键盘，但是，我的程序中仍然需要软键盘。我使用以下文章获得了一些运气： 显示iphone软键盘甚至认为连接了硬件键盘，但iOS 5打破了这种方法。在大多数视图中，软键盘的底部都会被稍微切断，但在其他视图中，只有一半的键盘出现在窗口内，而不是您期望的位置。

以下所有代码在 iOS4 中的 AppDelegate.m 文件中均有效，但在 iOS5 中无效。

发送 UITextFieldTextDidBeginEditingNotification 后调用forceKeyboard。

-(void) textFieldBegan: (NSNotification *) theNotification
{
    UITextField *theTextField = [theNotification object];
    theTextField.inputAccessoryView = inputAccessoryView;
    [self performSelector:@selector(forceKeyboard) withObject:nil afterDelay:0];
}


//Change the inputAccessoryView frame
-(void) forceKeyboard
{
    inputAccessoryView.superview.frame = CGRectMake(0, 502, 1024, 265);

    int movementDistance = 1;
    float movementDuration = 0.3f;

    [UIView beginAnimations: @"kb_anim_open" context: nil];
    [UIView setAnimationBeginsFromCurrentState: YES];
    [UIView setAnimationDuration: movementDuration];
    inputAccessoryView.superview.frame = CGRectOffset(inputAccessoryView.superview.frame, 0, movementDistance);
    [UIView commitAnimations];
}

发送 UITextFieldTextDidEndEditingNotification 后调用 Close Keyboard。

-(void) textFieldEnd: (NSNotification *) theNotification
{
    UITextView *theTextView = [theNotification object];
    [theTextView resignFirstResponder];
    [self performSelector:@selector(forceCloseKeyboard) withObject:nil afterDelay:0];
}


-(void) forceCloseKeyboard
{
    inputAccessoryView.superview.frame = CGRectMake(0, 502, 1024, 265);

    int movementDistance = 502;
    float movementDuration = 0.3f;

    [UIView beginAnimations: @"kb_anim_close" context: nil];
    [UIView setAnimationBeginsFromCurrentState: YES];
    [UIView setAnimationDuration: movementDuration];
    inputAccessoryView.superview.frame = CGRectOffset(inputAccessoryView.superview.frame, 0, movementDistance);
    [UIView commitAnimations];
}

任何关于如何驯服软键盘的想法将不胜感激；我已经尝试与 superview.frame 值搏斗一段时间，但没有运气。

感谢您的阅读。

---

更新

我已经找到了一个在 iOS 4 和 5 中打开和关闭键盘的设置，但没有动画。同样，这一切都在 AppDelegate 中，其中“textFieldBegan”和“textFieldEnd”分别由用户开始和结束编辑时发送的通知调用。

-(void) textFieldBegan: (NSNotification *) theNotification
{
    UITextField *theTextField = [theNotification object];

     if (!inputAccessoryView) {
         inputAccessoryView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1024, 1)];
     }else{
         inputAccessoryView.frame = CGRectMake(0, 0, 1024, 1);
     }

     theTextField.inputAccessoryView = inputAccessoryView;

     [self performSelector:@selector(forceKeyboard) withObject:nil afterDelay:0];
}

-(void) textFieldEnd: (NSNotification *) theNotification
{
    NSString *classstr = NSStringFromClass([[theNotification object] class]);

    UITextView *theTextView = [theNotification object];
    [self performSelector:@selector(forceCloseKeyboard) withObject:nil afterDelay:0];
    [theTextView resignFirstResponder];
}


//Change the inputAccessoryView frame
-(void) forceKeyboard
{
    //default center = 512, 591
    inputAccessoryView.superview.frame = CGRectMake(0, 415, 1024, 353);
    [UIView animateWithDuration:0.3 animations: ^ { [inputAccessoryView.superview transform]; }];
}
-(void) forceCloseKeyboard  //Unnecessary?
{
    inputAccessoryView.frame = CGRectMake(0, 0, 1024, 0);
    [UIView animateWithDuration:0.3 animations: ^ { [inputAccessoryView transform]; }];
}

看起来好像“forceCloseKeyboard”方法并没有真正执行任何操作，因为当 textField 退出响应程序时，它无论如何都会关闭键盘。我把它留在这里，以防有人能想出一种方法来动画键盘的打开和关闭。