關於iOS Tabbar的一些設定

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事實上iOS Tabbar的可定製性很高，我們沒有必要反覆造輪子，以下是筆者收集的一些tabbar的經常使用設定。希望對大家有所協助。

設定tabbar選中顏色

iOS7設定例如以下：

[self.tabBarController.tabBarsetSelectedImageTintColor:[UIColor greenColor]];

ios8中例如以下設定：

self.tabBar.tintColor=[UIColor greenColor];

消除tabbar邊框

在appdelegate的程式啟動處：

[[UITabBar appearance] setShadowImage:[[UIImage alloc]init]];

[[UITabBar appearance] setBackgroundImage:[[UIImage alloc]init]];

設定tabbar item原始表徵圖與原始選中表徵圖。而不是系統自己主動填充的顏色

    // 拿到 TabBar 在拿到想應的item    UITabBar *tabBar = _tabBarController.tabBar;    UITabBarItem *item0 = [tabBar.items objectAtIndex:0];    UITabBarItem *item1 = [tabBar.items objectAtIndex:1];    UITabBarItem *item2 = [tabBar.items objectAtIndex:2];    UITabBarItem *item3 = [tabBar.items objectAtIndex:3];    // 對item設定對應地圖片    item0.selectedImage = [[UIImage imageNamed:@"recognize-1"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];;    item0.image = [[UIImage imageNamed:@"recognize"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];         item1.selectedImage = [[UIImage imageNamed:@"life-1"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];;    item1.image = [[UIImage imageNamed:@"life"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];         item2.selectedImage = [[UIImage imageNamed:@"edit-1"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];;    item2.image = [[UIImage imageNamed:@"edit"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];         item3.selectedImage = [[UIImage imageNamed:@"setting-1"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];;    item3.image = [[UIImage imageNamed:@"setting"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

設定tabbar背景圖片

    UIView *backView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, Main_Screen_Width, 49)];    backView.backgroundColor = [UIColor redColor];    [self.tabBar insertSubview:backView atIndex:0];    self.tabBar.opaque = YES;

設定tabbar item選中時的背景圖片

1、5.0以上版本號碼
     

self.tabBar.selectionIndicatorImage = [UIImage imageNamed:@"system_tabbar_item_selected.png"];

2、5.0下面版本號碼
     首先實現例如以下方法：

- (void)setNoHighlistTabBar:(UITabBarController *)tabBarController{    NSArray * tabBarSubviews = [tabBarController.tabBar subviews];       int index4SelView;       if(tabBarController.selectedIndex+1 > 4)    {//selected the last tab.        index4SelView = [tabBarSubviews count]-1;    }    else if([tabBarController.viewControllers count] > 5)    {//have "more" tab. and havn‘t selected the last tab:"more" tab.                      index4SelView = [tabBarSubviews count] - 5 + tabBarController.selectedIndex;    }    else    {//have no "more" tab.                      index4SelView = [tabBarSubviews count] -        [tabBarController.viewControllers count] + tabBarController.selectedIndex;    }    if([tabBarSubviews count] < index4SelView+1)    {        assert(false);        return;    }    UIView * selView = [tabBarSubviews objectAtIndex:index4SelView];       NSArray * selViewSubviews = [selView subviews];       for(UIView * v in selViewSubviews)    {        if(v && [NSStringFromClass([v class]) isEqualToString:@"UITabBarSelectionIndicatorView"])               {//the v is the highlight view.            [self.selectedItemBgImageView removeFromSuperview];            [selView insertSubview:self.selectedItemBgImageView belowSubview:v];                       [v removeFromSuperview];                                  break;        }    }}

  改方法的實質就是迴圈tabBar的subViews， 找到tabBar中的這個view, 是一個UITabBarSelectionIndicatorView的view，然後把它替換成你自己建立的UIImageView, 上例中的self.selectedItemBgImageView.
  然後須要把UITabBarController的delegate設為self, 在tabBarController:didSelectViewController的代理方法中運行上面的方法：[self setNoHighlistTabBar:self];
 還有setSelectIndex:方法中也要運行[self setNoHighlistTabBar:self];

關於iOS Tabbar的一些設定