//_commentView未textview,需要跟随键盘移动的控件,有疑问可留言
//viewDidload中
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillAppear:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillDisappear:) name:UIKeyboardWillHideNotification object:nil];
#pragma mark --开始编辑
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
[_commentView becomeFirstResponder];
return YES;
}
#pragma mark --键盘的高度计算：
-(CGFloat)keyboardEndingFrameHeight:(NSDictionary *)userInfo//计算键盘的高度
{
CGRect keyboardEndingUncorrectedFrame = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];
CGRect keyboardEndingFrame = [self.view convertRect:keyboardEndingUncorrectedFrame fromView:nil];
return keyboardEndingFrame.size.height;
}
#pragma mark --根据键盘高度将当前视图向上滚动同样高度。
-(void)keyboardWillAppear:(NSNotification *)notification
{
CGFloat change = [self keyboardEndingFrameHeight:[notification userInfo]];
[self.view bringSubviewToFront:_commentView];
_commentView.transform = CGAffineTransformMakeTranslation(0, -change);
}
#pragma mark --当键盘消失后，视图需要恢复原状。
-(void)keyboardWillDisappear:(NSNotification *)notification
{
_commentView.transform = CGAffineTransformIdentity;
}