Question

我的导航栏中有一个自定义的后退按钮。当键盘出现时，我只需用关闭按钮替换后退按钮。当键盘关闭时，我恢复后退按钮。

这是我用来设置左导航按钮的功能：

-(UIBarButtonItem*)configureLeftButtonWithImageName:(NSString*)imageName
                                         target:(id)target
                                         action:(SEL)action
{
    UIButton *accountButton = [UIButton buttonWithType:UIButtonTypeCustom];
    UIImage *buttImage = [UIImage imageNamed:imageName];
    [accountButton setImage:buttImage forState:UIControlStateNormal];
    float padding = 4;

    accountButton.imageEdgeInsets = UIEdgeInsetsMake(padding, 0, padding, 2*padding);
    float buttH = kNavigationButtonHeight + 2*padding;
    float buttW = buttH;
    if( buttImage )
    {
        buttW = buttH * buttImage.size.width / buttImage.size.height;
    }
    accountButton.bounds = CGRectMake(padding, padding, buttW, buttH);

    [accountButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:accountButton];
    [self.navigationItem setLeftBarButtonItem:barButtonItem];
    return barButtonItem;
}

我在这里切换：

-(void)kbDidAppear
{
    [self configureLeftButtonWithImageName:@"quit" target:self action:@selector(hideKb:)];
}

-(void)kbDidDisappear
{
    [self configureLeftButtonWithImageName:@"back" target:self action:@selector(navigationBack:)];
}

但是当使用退出按钮替换后退按钮时，会播放不需要的动画：

退出按钮出现在导航栏的左上角，然后将该位置设置为正常值......

当我从退出按钮切换到后退按钮时，问题不会出现！

Answer 1

我刚刚找到了解决方法，我正在从返回按钮切换到退出按钮 UIKeyboardWillShowNotification 回调，如果我在 UIKeyboardDidShowNotification 回调中进行回调，不再有奇怪的动画

导航栏按钮上的不需要的动画

1 个答案: