ios如何实现被键盘遮挡时，带有textfield的tableview自动上移

最正规的办法，用通知
step 1：
在进入视图的时候添加监视：（viewDidLoad什么的）

复制代码 // Observe keyboard hide and show notifications to resize the text view appropriately.     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

step 2:
在键盘动作的时候移动视图：

复制代码 - (void)keyboardWillShow:(NSNotification *)notification {         /*      Reduce the size of the text view so that it's not obscured by the keyboard.      Animate the resize so that it's in sync with the appearance of the keyboard.      */     NSDictionary *userInfo = [notification userInfo];         // Get the origin of the keyboard when it's displayed.     NSValue* aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];     // Get the top of the keyboard as the y coordinate of its origin in self's view's coordinate system. The bottom of the text view's frame should align with the top of the keyboard's final position.     CGRect keyboardRect = [aValue CGRectValue];     keyboardRect = [self.view convertRect:keyboardRect fromView:nil];         CGFloat keyboardTop = keyboardRect.origin.y;     CGRect newTextViewFrame = self.view.bounds;     newTextViewFrame.size.height = keyboardTop - self.view.bounds.origin.y;         // Get the duration of the animation.     NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];     NSTimeInterval animationDuration;     [animationDurationValue getValue:&animationDuration];         // Animate the resize of the text view's frame in sync with the keyboard's appearance.     [UIView beginAnimations:nil context:NULL];     [UIView setAnimationDuration:animationDuration];         textView.frame = newTextViewFrame;     [UIView commitAnimations]; } - (void)keyboardWillHide:(NSNotification *)notification {         NSDictionary* userInfo = [notification userInfo];         /*      Restore the size of the text view (fill self's view).      Animate the resize so that it's in sync with the disappearance of the keyboard.      */     NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];     NSTimeInterval animationDuration;     [animationDurationValue getValue:&animationDuration];         [UIView beginAnimations:nil context:NULL];     [UIView setAnimationDuration:animationDuration];         textView.frame = self.view.bounds;         [UIView commitAnimations]; }

step 3:
在退出视图的时候注销通知
viewDidUnload:

复制代码 [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];     [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];

dealloc:

复制代码 [[NSNotificationCenter defaultCenter] removeObserver:self name:nil object:nil];

这些代码是摘自apple sample code KeyboardAccessory.
些许细节自己修改下就好了，比如那个textView