iOS开发, tabbar自定义图片

  Sim_FindViewController * findVC = [[Sim_FindViewController alloc] initWithNibName:@"Sim_FindViewController" bundle:nil];

    findVC.title = @"法制金融";

    UINavigationController * findNaVC = [[UINavigationController alloc] initWithRootViewController:findVC];

  

    Sim_RightsMaintenanceViewController *rightsMaintenanceVC = [[Sim_RightsMaintenanceViewController alloc] initWithNibName:@"Sim_RightsMaintenanceViewController" bundle:nil];

    rightsMaintenanceVC.title = @"维权平台";

    UINavigationController * rightsmaintenanceNaVC = [[UINavigationController alloc] initWithRootViewController:rightsMaintenanceVC];

    

    RX_AskViewController *askVC = [[RX_AskViewController alloc] initWithNibName:@"RX_AskViewController" bundle:nil];

    askVC.title = @"问律师";

    UINavigationController * askNaVC = [[UINavigationController alloc] initWithRootViewController:askVC];

    

    RX_PlatfromNavigationViewController * platfromVC = [[RX_PlatfromNavigationViewController alloc] initWithNibName:@"RX_PlatfromNavigationViewController" bundle:nil];

    platfromVC.title = @"平台导航";

    UINavigationController * platfromNav = [[UINavigationController alloc] initWithRootViewController:platfromVC];

    

    self.tabBar.tintColor = [UIColor redColor];

    self.viewControllers = @[findNaVC, rightsmaintenanceNaVC, askNaVC, platfromNav];

    UITabBar *tabBar = self.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];

    

    item0.selectedImage = [[UIImage imageNamed:@"fzjr_Select.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];;

    item0.image = [[UIImage imageNamed:@"fzjr.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

    

    item1.selectedImage = [[UIImage imageNamed:@"Rights_Select.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];;

    item1.image = [[UIImage imageNamed:@"Rights0224.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

    

    item2.selectedImage = [[UIImage imageNamed:@"ask_Select.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];;

    item2.image = [[UIImage imageNamed:@"ask0224.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

    

    item3.selectedImage = [[UIImage imageNamed:@"platform_Select.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];;

    item3.image = [[UIImage imageNamed:@"platform.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];