注册监听键盘事件的通知
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardShow:)
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardHide:)
name:UIKeyboardDidHideNotification
object:nil];
在键盘将要出现和隐藏的回调中
- (void)keyboardWillShows:(NSNotification *)notif
{
CGRect frame = [[notif.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGFloat offset= -frame.size.height;
[UIView animateWithDuration:0.3 animations:^{
CGRect rect =self.frame;
rect.origin.y=offset;
self.frame=rect;
}];
}
- (void)keyboardWillHides:(NSNotification *)notif
{
[UIView animateWithDuration:0.3 animations:^{
CGRect rect =self.frame;
rect.origin.y=0;
self.frame=rect;
}];