1.注册监听键盘弹出和收起的通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardWillHideNotification object:nil];
- 方法实现
#pragma mark --键盘弹出
- (void)keyboardWillChangeFrame:(NSNotification *)notification{
//取出键盘动画的时间(根据userInfo的key----UIKeyboardAnimationDurationUserInfoKey)
CGFloat duration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue];
//取得键盘最后的frame(根据userInfo的key----UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 227}, {320, 253}}";)
CGRect keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
//计算控制器的view需要平移的距离
CGFloat transformY = keyboardFrame.origin.y - self.view.frame.size.height;
//执行动画
[UIView animateWithDuration:duration animations:^{
}];
}
#pragma mark --键盘收回
- (void)keyboardDidHide:(NSNotification *)notification{
CGFloat duration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue];
[UIView animateWithDuration:duration animations:^{
}];
}
3.dealloc中移除通知
- (void)dealloc{
[[NSNotificationCenter defaultCenter]removeObserver:self];
}
