在iOS的开发过程中，有时候需要处理键盘的弹出和收回。

以及键盘弹出收回时、view的处理

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）

 

//监听键盘的通知    [[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：

 

- (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];        self.reportTableView.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];        self.reportTableView.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.height  - 55 - 64);        [UIView commitAnimations];}

 

 

step 3:

在退出视图的时候注销通知

viewDidUnload:

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

 

step 4:

dealloc:

-(void)dealloc{    [[NSNotificationCenter defaultCenter] removeObserver:self name:nil object:nil];}

 

这些代码是摘自apple sample code KeyboardAccessory.

 

细节自己修改下就好了，比如那个reportTableView、CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.height  - 55 - 64)