moreNavigationController 暂时不显示图像

Posted 2023-02-23

【中文标题】moreNavigationController 暂时不显示图像

【英文标题】：moreNavigationController not displaying image for an instant

【发布时间】：2016-02-23 11:01:21

【问题描述】：

我有一个正常工作的 UITabBar，但是当我添加更多元素并且出现更多按钮时，它显示出一种奇怪的行为。

如果我选择一个项目，然后再次按“更多”按钮返回，则所选项目会在几秒钟内不显示图像，然后再次显示。

我以编程方式创建了 UITabBar，并以编程方式将 moreNavigationController 颜色的 UITableView 更改为。

如果我删除 moreNavigationController 的个性化，行为就会出现。

我的第一个猜测是 UITabBar 的色调（白色），但我将其更改为红色并且行为是相同的。

然后我虽然是图像，但未选择的图像是灰色的，选择的图像是蓝色的。

这是我用来创建 UITabBar 的代码：

- (void)createTabBar

    tabController = [self.storyboard instantiateViewControllerWithIdentifier:@"cCustomTabController"];
    dValue = [dConfiguration objectForKey:@"Buttons"];
    NSMutableArray  *aControllers = [[NSMutableArray alloc] init];
    int i = 0;
    for (NSString* sProperty in dValue) 
        NSString* d = @"Details";
        NetworkStatus internetStatus = [_reachabilityInfo currentReachabilityStatus];
        NSData *itemData = Nil;
        if (internetStatus != NotReachable)
            itemData = [util getSpecificJsonData:[sProperty valueForKeyPath:@"Item"]];
        if(itemData != nil)
            UIStoryboard *aStoryboard = [UIStoryboard storyboardWithName:@"Main_iPhone" bundle:[NSBundle mainBundle]];
            UIViewController *vcCustom = [aStoryboard instantiateViewControllerWithIdentifier:[util getControllerName:[sProperty valueForKeyPath:@"ViewController"]]];
            [vcCustom setValue:itemData forKey:@"JsonData"];
            [vcCustom setValue:[sProperty valueForKeyPath:@"Item"] forKey:@"Item"];
            [vcCustom setValue:d forKey:@"Details"];
            [util saveJSON:itemData withName:[NSString stringWithFormat:@"%@%@",[sProperty valueForKeyPath:@"Item"],[CommonsUtils getCommonUtil].getAppLanguage]];
            [[vcCustom navigationController] setNavigationBarHidden:NO animated:NO];
            vcCustom.navigationItem.leftBarButtonItem = Nil;
            vcCustom.navigationItem.hidesBackButton = YES;
            UIImage *imageBtn = [self changeImageSize:[UIImage imageNamed:[util getImageName:[sProperty valueForKeyPath:@"Image"] andRetrina:[sProperty valueForKeyPath:@"ImageRetina"]]] scaledToSize:CGSizeMake(30, 30)];
            UIImage *imageBtnPress = [self changeImageSize:[UIImage imageNamed:[util getImageName:[sProperty valueForKeyPath:@"ImageHeighlighted"] andRetrina:[sProperty valueForKeyPath:@"ImageRetinaHeighlighted"]]] scaledToSize:CGSizeMake(30, 30)];
            UITabBarItem *tab = [[UITabBarItem alloc] initWithTitle:[sProperty valueForKeyPath:@"Title"] image:imageBtn selectedImage:imageBtnPress];
            UIImage * iSelected = imageBtnPress;
            iSelected = [iSelected imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
            [tab setSelectedImage:iSelected];
            tab.tag = i;
            if([[sProperty valueForKeyPath:@"Title"] isEqualToString:@"Notificaciones"])
                tab.badgeValue=[sProperty valueForKeyPath:@"Badge"];
            [vcCustom setTabBarItem:tab];
            [vcCustom setTitle:[sProperty valueForKeyPath:@"Title"]];
            UINavigationController *navigationController = [[cCustomNavigationController alloc] initWithRootViewController:vcCustom];
            navigationController.navigationBar.tintColor = NAVBAR_TINTCOLOR;
            UIColor *uicText = NAVBAR_TEXTCOLOR;
            navigationController.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObject:uicText forKey:NSForegroundColorAttributeName];
            [aControllers insertObject:navigationController atIndex:i];
            i++;
        
    
    tabController.delegate = self;
    tabController.viewControllers = aControllers;
    tabController.tabBar.tintColor = TABBAR_TINTCOLOR;
    UIColor *uicTabBar = TABBAR_BACKGROUND_COLOR;
    [[UITabBar appearance] setBarTintColor:uicTabBar];

    tabController.customizableViewControllers = @[];
    tabController.moreNavigationController.navigationBar.tintColor = NAVBAR_TINTCOLOR;
    UIColor *uicText = NAVBAR_TEXTCOLOR;
    tabController.moreNavigationController.navigationBar.barTintColor = NAVBAR_BACKGROUND_COLOR;
    tabController.moreNavigationController.navigationBar.translucent = YES;
    tabController.moreNavigationController.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObject:uicText forKey:NSForegroundColorAttributeName];

这就是我个性化 moreNavigationController 的 UITableView 的方式：

UITableView *tView = (UITableView*)tabController.moreNavigationController.topViewController.view;
if ([[tView subviews] count]) 
    for (UITableViewCell *cCell in [tView visibleCells]) 
        cCell.textLabel.textColor = TABLECELL_TEXT_COLOR;
        cCell.textLabel.highlightedTextColor = TABLECELL_TEXT_COLOR_HIGHLIGHTED;
        cCell.contentView.backgroundColor = TABLECELL_BACKGROUND_COLOR;
        cCell.backgroundColor = TABLECELL_BACKGROUND_COLOR;
        UIView * selectedBackgroundView = [[UIView alloc] init];
        UIColor *uicCell = TABLECELL_BACKGROUND_COLOR_SELECTED
        [selectedBackgroundView setBackgroundColor:uicCell];
        [cCell setSelectedBackgroundView:selectedBackgroundView];
    

在这张图片中，您可以看到正在发生的事情：

提前致谢。

【参考方案1】：

正如我在这里看到的：

MoreNavigationController images disappearing on select

我已将这一行添加到我的代码中：

navigationController.tabBarItem = vcCustom.tabBarItem;

感谢您的帮助。