iOS开发项目篇—26修改UITabBar的系统设置

  1 //
  2 //  YYTabBarViewController.m
  3 //
  4 
  5 #import "YYTabBarViewController.h"
  6 #import "YYHomeTableViewController.h"
  7 #import "YYDiscoverViewController.h"
  8 #import "YYMessageViewController.h"
  9 #import "YYProfileViewController.h"
 10 #import "UIImage+Extension.h"
 11 #import "YYNavigationViewController.h"
 12 
 13 @interface YYTabBarViewController ()<UITabBarControllerDelegate>
 14 
 15 @end
 16 
 17 @implementation YYTabBarViewController
 18 
 19 
 20 - (void)viewDidLoad
 21 {
 22     [super viewDidLoad];
 23     //添加四个子控制器
 24     YYHomeTableViewController *home=[[YYHomeTableViewController alloc]init];
 25     [self addOneChildVc:home title:@"首页" imageName:@"tabbar_home" selectedImageName:@"tabbar_home_selected"];
 26     
 27     
 28     YYMessageViewController *message=[[YYMessageViewController alloc]init];
 29     [self addOneChildVc:message title:@"消息" imageName:@"tabbar_message_center" selectedImageName:@"tabbar_message_center_selected"];
 30     
 31     YYDiscoverViewController *discover=[[YYDiscoverViewController alloc]init];
 32     [self addOneChildVc:discover title:@"发现" imageName:@"tabbar_discover" selectedImageName:@"tabbar_discover_selected"];
 33     
 34     YYProfileViewController *profile=[[YYProfileViewController alloc]init];
 35     [self addOneChildVc:profile title:@"我" imageName:@"tabbar_profile" selectedImageName:@"tabbar_profile_selected"];
 36     
 37 //    self.tabBar.backgroundImage=[UIImage imageWithName:@"tabbar_background"];
 38     self.delegate=self;
 39  
 40 }
 41 
 42 -(void)viewDidAppear:(BOOL)animated
 43 {
 44     [super viewDidAppear:animated];
 45     
 46     [self removeBackgroundInTabBarButton];
 47 }
 48 
 49 -(void)removeBackgroundInTabBarButton
 50 {
 51     for (UIView *child in self.tabBar.subviews) {
 52         //如果不是UITabBarButton，就过掉
 53         if (![child isKindOfClass:NSClassFromString(@"UITabBarButton")]) continue;
 54         
 55         BOOL selected=NO;
 56 
 57         for (UIView *childchild in child.subviews) {
 58             if ([childchild isKindOfClass:NSClassFromString(@"UITabBarSelectionIndicatorView")]) {//说明是个选中的背景
 59                 [childchild removeFromSuperview];
 60                 selected = YES;
 61             }
 62        
 63             if ([childchild isKindOfClass:[UILabel class]]) {//说明是个UIlable
 64                 UILabel *label = (UILabel *)childchild;
 65 //                label.font=[UIFont systemFontOfSize:15];
 66                 if (selected) {//说明这个button选中，设置文字的颜色为橙色
 67                     label.textColor=[UIColor orangeColor];
 68                 }else           //  说明这个button没有选中，设置label颜色为黑色
 69                 {
 70                     label.textColor=[UIColor blackColor];
 71                 }
 72             }
 73         }
 74     }
 75 }
 76 
 77 
 78 -(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
 79 {
 80     [self removeBackgroundInTabBarButton];
 81 }
 82     
 83 /**
 84  *  添加一个子控制器
 85  *
 86  *  @param childVC           子控制对象
 87  *  @param title             标题
 88  *  @param imageName         图标
 89  *  @param selectedImageName 选中时的图标
 90  */
 91 -(void)addOneChildVc:(UIViewController *)childVc title:(NSString *)title imageName:(NSString *)imageName selectedImageName:(NSString *)selectedImageName
 92 {
 93     //随机设置子控制器的背景颜色
 94 //    childVc.view.backgroundColor=YYRandomColor;
 95     
 96     //设置标题
 97     childVc.title=title;  //相当于设置了后两者的标题
 98 //    childVc.navigationItem.title=title;//设置导航栏的标题
 99 //    childVc.tabBarItem.title=title;//设置tabbar上面的标题
100     
101     //设置图标
102     childVc.tabBarItem.image=[UIImage imageWithName:imageName];
103     //设置选中时的图标
104     UIImage *selectedImage=[UIImage imageWithName:selectedImageName];
105     
106     
107     if (iOS7) {
108         // 声明这张图片用原图(别渲染)
109         selectedImage = [selectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
110     }
111     childVc.tabBarItem.selectedImage = selectedImage;
112     
113      // 添加为tabbar控制器的子控制器
114     YYNavigationViewController *nav=[[YYNavigationViewController alloc]initWithRootViewController:childVc];
115     
116     [self addChildViewController:nav];
117 
118 }
119 
120 
121 // 在iOS7中, 会对selectedImage的图片进行再次渲染为蓝色
122 // 要想显示原图, 就必须得告诉它: 不要渲染
123 
124 // Xcode的插件安装路径: /Users/用户名/Library/Application Support/Developer/Shared/Xcode/Plug-ins
125 @end