//UITabBarItem 设置有颜色的图片
UITabBarItem *item = self.tabBar.items[i];
item.image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
//UITabBarItem 设置有颜色的图片
UITabBarItem *item = self.tabBar.items[i];
item.image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];