1、输入框监听UIControlEventEditingDidBegin事件，当用户开始输入时，将整个view上移。
输入框监听UIControlEventEditingDidEnd事件，当用户结束输入时，将整个view下移，恢复到原位置。
[textfield addTarget:self action:@selector(textFieldDidBeginEditing:) forControlEvents:UIControlEventEditingDidBegin];
[textfield addTarget:self action:@selector(textFieldDidEndEditing:) forControlEvents:UIControlEventEditingDidEnd];
通过tag值来确定每个textfield是否响应
2//键盘监听
[[NSNotificationCenter
defaultCenter] addObserver:self
selector:@selector(keyboardWillChangeFrame:)
name:UIKeyboardWillChangeFrameNotification object:nil];
- (void)keyboardWillChangeFrame:(NSNotification *)notification
{
CGRect isUpflag;
[[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] getValue:&isUpflag];
NSDictionary *info = [notification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
[UIView animateWithDuration:0.25 animations:^{
showView.center = CGPointMake(showView.center.x, self.view.center.y - kbSize.height);
}];
}
kbSize.height可以获取键盘的高度
原文地址 ：http://blog.csdn.net/pzhtpf/article/details/9857857
