IOS键盘遮盖问题解决办法

1.添加键盘显示和隐藏通知事件响应

<pre name="code" class="objc">  // 添加键盘显示/隐藏的通知
    [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(keyboardWillShow:)

                                                 name:UIKeyboardDidShowNotification object:nil];


    [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(keyboardWillHide:)

                                                 name:UIKeyboardWillHideNotification object:nil];

2.事件响应

<pre name="code" class="objc">#pragma mark - Notification Method

///键盘显示事件
- (void) keyboardWillShow:(NSNotification *)notification {


    //获取键盘高度，在不同设备上，以及中英文下是不同的
    CGFloat kbHeight = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;
    // 取得键盘的动画时间，这样可以在视图上移的时候更连贯
    double duration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    CGFloat offset=输入框下边沿纵坐标-(self.view.frame.size.height-kbHeight);
    //将视图上移计算好的偏移
    if(offset > 0) {
        [UIView animateWithDuration:duration animations:^{
            self.view.frame = CGRectMake(0.0f, -offset, self.view.frame.size.width, self.view.frame.size.height);
        }];
    }
}

///键盘消失事件
- (void) keyboardWillHide:(NSNotification *)notify {
    // 键盘动画时间
    double duration = [[notify.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];

    //视图下沉恢复原状
    [UIView animateWithDuration:duration animations:^{
        self.view.frame = CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height);
    }];
}