iOS相应键盘高度变化，相应控件随之变化的代码段

本文介绍如何使用iOS的通知中心处理键盘显示和隐藏的通知，通过调整底部工具栏的位置来优化用户体验。文章详细展示了如何获取键盘动画时长及高度，并据此平滑地调整布局。

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//注册通知

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

//响应通知

#pragma mark keyboard notification

- (void)keyboardWillShow:(NSNotification *) notification {

float animationDuration = [[[notification userInfo] valueForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];

CGFloat height = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;

CGRect bottomBarFrame = self.mToolBar.frame;

{

[UIView beginAnimations:@"bottomBarUp" context:nil];

[UIView setAnimationDuration: animationDuration];

[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

bottomBarFrame.origin.y = self.view.bounds.size.height - 44 - height;

self.mToolBar.frame = bottomBarFrame;

[UIView commitAnimations];

}

- (void)keyboardWillHide:(NSNotification *) notification {