使用UIKeyboard预测打开和关闭来管理视图位置 [英] Manage view position with UIKeyboard prediction on and off

问题描述

我想在显示键盘时向上移动视图，而在像消息一样隐藏键盘时向下移动视图.我能够实现，但是我隐藏了预测，那里有一些空白.

I want to move the view up when the keyboard is shown and down when keyboard is hidden like in message. I am able to achieve it, but the i hide the prediction there is some blank space.

我正在使用" UIKeyboardWillShowNotification "和" UIKeyboardWillHideNotification "来处理键盘的移动

I am handling the movement of keyboard with "UIKeyboardWillShowNotification" and "UIKeyboardWillHideNotification"

- (void)viewWillAppear:(BOOL)animated {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}

- (void)viewWillDisappear:(BOOL)animated {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}

#pragma mark - keyboard movements
- (void)keyboardWillShow:(NSNotification *)notification
{
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    [UIView animateWithDuration:0.3 animations:^{
        CGRect f = self.view.frame;
        f.origin.y = -keyboardSize.height;
        self.view.frame = f;
    }];
}

-(void)keyboardWillHide:(NSNotification *)notification
{
    [UIView animateWithDuration:0.3 animations:^{
        CGRect f = self.view.frame;
        f.origin.y = 0.0f;
        self.view.frame = f;
    }];
}

我想像在消息应用程序中一样处理视图的移动.

I want to handle the movement of view like it happens in messages app.

推荐答案

CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

替换为下一行

CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

这篇关于使用UIKeyboard预测打开和关闭来管理视图位置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！