在没有UIKeyboardWillShowNotification的情况下获取键盘大小

Question

我想在不使用键盘通知的情况下获得键盘的大小.原因是我在视图上有几个文本字段,我不需要为所有这些视图调整视图大小,正如我在几乎所有示例中看到的那样.我只需要在编辑时调整键盘后面的一些文本字段/视图的视图大小.所以我正在使用textFieldDidBeginEditing和 textFieldDidEndEditing方法,因为在这里我知道正在编辑的文本字段.另一个问题是,即使我订阅了键盘通知,UIKeyboardWillShowNotification之后textFieldDidBeginEditing也会被解雇,因此我无法在第一次激活时获得键盘大小.我假设没有提供实际文本字段或视图可用的键盘通知功能的信息.

The following code works but I need the keyboard size:

- (void) textFieldDidBeginEditing:(UITextField *) textField {
  if ([theControls containsObject: textField]) {
    [UIView beginAnimations: @"szar" context: nil];
    [UIView setAnimationDuration:0.3];
    self.view.transform = CGAffineTransformTranslate(self.view.transform, 0, -216);
    [UIView commitAnimations];
  }
}

- (void) textFieldDidEndEditing:(UITextField *) textField {
  if ([theControls containsObject: textField]) {
    [UIView beginAnimations: @"szar" context: nil];
    [UIView setAnimationDuration:0.3];
    self.view.transform = CGAffineTransformTranslate(self.view.transform, 0, +216);
    [UIView commitAnimations];
  }
}

Answer 1

我仍然使用通知但不使用您指定的通知.也许这会更好？只是想帮忙,我明白这些事情是多么令人沮丧.

viewDidLoad {
[[NSNotificationCenter defaultCenter] addObserver:self
                                     selector:@selector(keyboardWasShown:)
                                         name:UIKeyboardDidShowNotification
                                       object:nil];
 //For Later Use
[[NSNotificationCenter defaultCenter] addObserver:self
                                     selector:@selector(keyboardWillHide:)
                                         name:UIKeyboardWillHideNotification
                                       object:nil];
}

- (void)keyboardWasShown:(NSNotification *)notification {
  // Get the size of the keyboard.
  CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
}

编辑:这可能有助于区分非活动的活动文本字段

- (void)textFieldDidBeginEditing:(UITextField *)textField {
self.activeTextField = textField;
}


- (void)textFieldDidEndEditing:(UITextField *)textField{
self.activeTextField = nil;
}