ios开发 点击文本（TextField）输入的时候向上推以及输入之后恢复的动画

1.添加委托UITextFieldDelegate

2.

-(BOOL)textFieldShouldReturn:(UITextField *)textField {

    [textField resignFirstResponder];

    return YES;

}  //隐藏键盘

- (void)textFieldDidBeginEditing:(UITextField *)textField {

    [self animateTextField: textField up: YES];

}

- (void)textFieldDidEndEditing:(UITextField *)textField {

    [self animateTextField: textField up: NO];

}

- (void) animateTextField: (UITextField*) textField up: (BOOL) up {

    const int movementDistance = 60; // tweak as needed

    const float movementDuration = 0.3f; // tweak as needed

    

    int movement = (up ? -movementDistance : movementDistance);

    

    [UIView beginAnimations: @"anim" context: nil];

    [UIView setAnimationBeginsFromCurrentState: YES];

    [UIView setAnimationDuration: movementDuration];

    self.view.frame = CGRectOffset(self.view.frame, 0, movement);

    [UIView commitAnimations];

}

 

 

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardWillShow:) name:UIKeyboardWillShowNotification object:nil];

    

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardWillHide:) name:UIKeyboardWillHideNotification object:nil];





#pragma mark - 键盘处理

#pragma mark 键盘即将显示



- (void)keyBoardWillShow:(NSNotification *)note{

    

    CGRect rect = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

    CGFloat ty = - rect.size.height;

    [UIView animateWithDuration:[note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue] animations:^{

        self.view.transform = CGAffineTransformMakeTranslation(0, ty + kNavigationBarHeight);

    }];

    

}



#pragma mark 键盘即将退出



- (void)keyBoardWillHide:(NSNotification *)note{

    

    [UIView animateWithDuration:[note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue] animations:^{

        self.view.transform = CGAffineTransformIdentity;

    }];

}