完美处理弹出键盘，界面上移功能

时间 : 14-11-04 栏目 : iOS, 移动开发作者 : noway 评论 : 0 点击 : 349 次

1. 定义

int m_curKeyboardHeight;

在init函数中设置为 m_curKeyboardHeight =0;

2. 在init中注册两个通知

[[NSNotificationCenter defaultCenter] addObserver:selfselector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotificationobject:nil];

[[NSNotificationCenter defaultCenter] addObserver:selfselector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotificationobject:nil];

在dealloc中，注销这两个通知：

[[NSNotificationCenter defaultCenter] removeObserver:selfname:UIKeyboardWillShowNotification object:nil];

[[NSNotificationCenter defaultCenter] removeObserver:selfname:UIKeyboardWillHideNotification object:nil];

3. 通知响应函数的定义以及实现。

假设输入框为

UITextField * m_inputField;

- (void)keyboardWillShow:(NSNotification *)aNotification;

- (void)keyboardWillHide:(NSNotification *)aNotification;

- (void)keyboardWillShow:(NSNotification *)aNotification

{

if ([m_inputField isFirstResponder] == NO)

{

return;

}

CGRect keyboardRect = [[[aNotification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];

NSTimeInterval animationDuration = [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];

CGRect bottomframe = m_bottomImage.frame;

bottomframe.origin.y -= keyboardRect.size.width - m_curKeyboardHeight;

CGRect fieldframe = m_inputField.frame;

fieldframe.origin.y -= keyboardRect.size.width - m_curKeyboardHeight;

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

[UIView setAnimationDuration:animationDuration];

m_bottomImage.frame = bottomframe;

m_inputField.frame = fieldframe;

[UIView commitAnimations];

m_curKeyboardHeight = keyboardRect.size.width;

}

- (void)keyboardWillHide:(NSNotification *)aNotification

{

if ([m_inputField isFirstResponder] == NO)

{

return;

}

NSTimeInterval animationDuration = [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];

CGRect bottomframe = m_bottomImage.frame;

bottomframe.origin.y += m_curKeyboardHeight;

CGRect fieldframe = m_inputField.frame;

fieldframe.origin.y+= m_curKeyboardHeight;

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

[UIView setAnimationDuration:animationDuration];

m_bottomImage.frame = bottomframe;

m_inputField.frame = fieldframe;

[UIView commitAnimations];

m_curKeyboardHeight = 0;

}

本文标签： iOS

除非注明，文章均为( noway )原创，转载请保留链接: http://blog-old.z3a105.com/?p=256

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完美处理弹出键盘，界面上移功能

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