自定义UITabBar ios7-ios8按钮和背景

我一直在努力改变uitabbar的图标和背景，使它看起来就像我想要的那样。每次我改变背景颜色时，它都会显示颜色，但不是我给定的特定颜色的纯色。此外，我为项目设置的图像在运行时也会变成灰色

所以我有一个带有“开始”按钮的“开始”CV。 按钮代码：

- (IBAction)start:(id)sender {

UIStoryboard *storyBoard = [self storyboard];
Start *startViewController = [storyBoard instantiateViewControllerWithIdentifier:@"start"];
[self presentViewController:startViewController animated:NO completion:nil];}

正如您所看到的，它只发送到第二个VC，即UITabBarController。 在appdelegate中，我尝试了：

    Start *tabController = (Start *)self.window.rootViewController;

//tab1
UITabBar *tabBar = (UITabBar *)tabController.tabBar;
UITabBarItem *item1 = [tabBar.items objectAtIndex:0];
[item1 setImage:[[UIImage imageNamed:@"1.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];

//tab2
UITabBarItem *item2 = [tabBar.items objectAtIndex:1];
[item2 setImage:[[UIImage imageNamed:@"2.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
//tab3
UITabBarItem *item3 = [tabBar.items objectAtIndex:2];
[item3 setImage:[[UIImage imageNamed:@"3.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
//tab4
UITabBarItem *item4 = [tabBar.items objectAtIndex:3];
[item4 setImage:[[UIImage imageNamed:@"4.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];

但它似乎不起作用。我看了很多，但我能找到的只是关于setFinishedSelectedImage:withFinishedUnselectedImage:的教程；这并没有真正起到帮助作用，因为它已经被弃用了。到目前为止，我所能做的就是从interfacebuilder设置uitabbar

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要更改颜色，我只需更改色调和背景色。还尝试将uiimageview放在UIAbbar后面，但似乎也不起作用。

要使UIAbbar ios7-ios8合算，请使用以下代码

 UITabBarItem *item0 = [self.tabBar.items objectAtIndex:0];
    UITabBarItem *item1 = [self.tabBar.items objectAtIndex:1];
    UITabBarItem *item2 = [self.tabBar.items objectAtIndex:2];
    UITabBarItem *item3 = [self.tabBar.items objectAtIndex:3];

    item0.title = @"item0title";
    item1.title = @"item1title";
    item2.title=@"item2title";
    item3.title=@"item3title";


    [item0 setImage:[[UIImage imageNamed:@"imagename"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [item0 setSelectedImage:[[UIImage imageNamed:@"imagename"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [item1 setImage:[[UIImage imageNamed:@"imagename"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [item1 setSelectedImage:[[UIImage imageNamed:@"imagename"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [item2 setImage:[[UIImage imageNamed:@"imagename"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [item2 setSelectedImage:[[UIImage imageNamed:@"imagename"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];

    [item3 setImage:[[UIImage imageNamed:@"imagename"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [item3 setSelectedImage:[[UIImage imageNamed:@"imagename"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    //[[UITabBar appearance] setSelectedImageTintColor:[uicolor whitcolor]];
    //[[UITabBar appearance] setBarTintColor:[UIColor yellowColor]];
    //[[UITabBar appearance] setTintColor:[UIColor yellowColor]];
    [[UITabBarItem appearance] setTitleTextAttributes:@{ NSForegroundColorAttributeName : [UIColor yellowColor] }
                                             forState:UIControlStateSelected];
    [[UITabBarItem appearance] setTitleTextAttributes:@{ NSForegroundColorAttributeName : [UIColor whiteColor] }
                                             forState:UIControlStateNormal];

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谢谢你的快速回复！对不起，我有个问题，但我应该在哪里使用它呢？我不知道如何从我的appdelegate引用到选项卡栏，我试图创建一个uitabarcontroller，但没有成功创建uitabarcontroller，并在情节提要中选择tabarview并添加自定义类