ipad如何知道键盘已被隐藏 [英] ipad how to know keyboard has been hidden

问题描述

我正在构建一个ipad应用程序，

Im building an ipad app,

它有一些文本字段，当点击时，移动到键盘上方，

it haves some text fields that when tapped, move above the keyboard,

如果点击计算按钮，键盘和视图，则向下，

if a "calculate" button is tapped, keyboard and view, go down,

但是如果用户从ipad点击隐藏键盘[右下角]键盘的键]

but if the user taps on the hide keyboard from the ipad [bottom right corner key of keyboard]

我的视图仍然移动很高，

my view remains moved high,

所以，我怎么能以编程方式知道隐藏键盘已被点击？

so, how can i know programatically that the "hide keyboard" has been tapped?

非常感谢！

推荐答案

您应该使用通知中心来跟踪键盘，

You should use the notification center for tracking the keyboard,

NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
[center addObserver:self selector:@selector(didShow) name:UIKeyboardDidShowNotification object:nil];
[center addObserver:self selector:@selector(didHide) name:UIKeyboardWillHideNotification object:nil];

//Resize your views in the below methods
- (void)didShow
{

}

- (void)didHide
{

}

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