// 键盘出现的通知 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil]; // 键盘消失的通知 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
- (void)keyboardWillShow:(NSNotification *)notification { // 获取键盘高度 CGFloat kbHeight = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height; // 计算出键盘顶端到输入框底端的距离 CGRect tFActualFrame = [self.currentTF convertRect:self.currentTF.frame toView:self.view]; // textField在self.view中的实际frame CGFloat offset; offset = tFActualFrame.origin.y + tFActualFrame.size.height - (Screen_Height - kbHeight - Keyboard_Interval); // Keyboard_Interval为自定义的textField与键盘保持的距离 // 键盘动画时间 double duration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]; // 将视图上移计算好的偏移 if (offset > 0) { [UIView animateWithDuration:duration animations:^{ self.view.frame = CGRectMake(0, -offset, self.view.frame.size.width, self.view.frame.size.height); }]; } } // 键盘消失事件 - (void)keyboardWillHide:(NSNotification *)notification { // 键盘动画时间 double duration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]; // 视图恢复原位置 [UIView animateWithDuration:duration animations:^{ self.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height); }]; }