1 #import "YYAppDelegate.h"2 #import "YYTabBarViewController.h"3 4 @implementation YYAppDelegate5 6 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions7 {8  9    //1.创建窗口
10     self.window=[[UIWindow alloc]init];
11     self.window.frame=[UIScreen mainScreen].bounds;
12
13     //2.设置窗口的根控制器
14 //    UITabBarController *tabbarVc =[[UITabBarController alloc]init];
15 //    self.window.rootViewController=tabbarVc;
16     self.window.rootViewController=[[YYTabBarViewController alloc]init];
17
18     //3.显示窗口
19     [self.window makeKeyAndVisible];
20     return YES;
21 }
22         

 1 //2 //  YYTabBarViewController.m3 //  02-微博添加子控制器和设置项目结构4 //5 //  Created by apple on 14-7-3.6 //  Copyright (c) 2014年 itcase. All rights reserved.7 //8 9 #import "YYTabBarViewController.h"
10 #import "YYHomeTableViewController.h"
11 #import "YYDiscoverViewController.h"
12 #import "YYMessageViewController.h"
13 #import "YYProfileViewController.h"
14 #import "UIImage+Extension.h"
15
16 @interface YYTabBarViewController ()
17
18 @end
19
20 @implementation YYTabBarViewController
21
22
23 - (void)viewDidLoad
24 {
25     [super viewDidLoad];
26     //添加四个子控制器
27     YYHomeTableViewController *home=[[YYHomeTableViewController alloc]init];
28     [self addOneChildVc:home title:@"首页" imageName:@"tabbar_home" selectedImageName:@"tabbar_home_selected"];
29
30
31     YYMessageViewController *message=[[YYMessageViewController alloc]init];
32     [self addOneChildVc:message title:@"消息" imageName:@"tabbar_message_center" selectedImageName:@"tabbar_message_center_selected"];
33
34     YYDiscoverViewController *discover=[[YYDiscoverViewController alloc]init];
35     [self addOneChildVc:discover title:@"发现" imageName:@"tabbar_discover" selectedImageName:@"tabbar_discover_selected"];
36
37     YYProfileViewController *profile=[[YYProfileViewController alloc]init];
38     [self addOneChildVc:profile title:@"我" imageName:@"tabbar_profile" selectedImageName:@"tabbar_profile_selected"];
39 }
40
41 /**
42  *  添加一个子控制器
43  *
44  *  @param childVC           子控制对象
45  *  @param title             标题
46  *  @param imageName         图标
47  *  @param selectedImageName 选中时的图标
48  */
49 -(void)addOneChildVc:(UIViewController *)childVc title:(NSString *)title imageName:(NSString *)imageName selectedImageName:(NSString *)selectedImageName
50 {
51     //随机设置子控制器的背景颜色
52     childVc.view.backgroundColor=YYRandomColor;
53     //设置标题
54     childVc.tabBarItem.title=title;
55     //设置图标
56     childVc.tabBarItem.image=[UIImage imageWithName:imageName];
57     //设置选中时的图标
58     UIImage *selectedImage=[UIImage imageWithName:selectedImageName];
59
60
61     if (iOS7) {
62         // 声明这张图片用原图(别渲染)
63         selectedImage = [selectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
64     }
65     childVc.tabBarItem.selectedImage = selectedImage;
66
67
68     //添加子控制器到tabbar
69     [self addChildViewController:childVc];
70 }
71
72
73 // 在iOS7中, 会对selectedImage的图片进行再次渲染为蓝色
74 // 要想显示原图, 就必须得告诉它: 不要渲染
75
76 // Xcode的插件安装路径: /Users/用户名/Library/Application Support/Developer/Shared/Xcode/Plug-ins
77 @end

 1 //2 //  UIImage+Extension.h3 //  4 //5 //  Created by apple on 14-7-3.6 //  Copyright (c) 2014年 heima. All rights reserved.7 //8 9 #import <UIKit/UIKit.h>
10
11 @interface UIImage (Extension)
12 + (UIImage *)imageWithName:(NSString *)name;
13 @end

 1 //2 //  UIImage+Extension.m3 //  4 //5 //  Created by apple on 14-7-3.6 //  Copyright (c) 2014年 heima. All rights reserved.7 //8 9 #import "UIImage+Extension.h"
10
11 @implementation UIImage (Extension)
12 + (UIImage *)imageWithName:(NSString *)name
13 {
14     UIImage *image = nil;
15     if (iOS7) { // 处理iOS7的情况
16         NSString *newName = [name stringByAppendingString:@"_os7"];
17         image = [UIImage imageNamed:newName];
18     }
19
20     if (image == nil) {
21         image = [UIImage imageNamed:name];
22     }
23     return image;
24 }
25 @end

 1 //2 //  Prefix header3 //4 //  The contents of this file are implicitly included at the beginning of every source file.5 //6 7 #import <Availability.h>8 9 #ifndef __IPHONE_5_0
10 #warning "This project uses features only available in iOS SDK 5.0 and later."
11 #endif
12
13 #ifdef __OBJC__
14     #import <UIKit/UIKit.h>
15     #import <Foundation/Foundation.h>
16
17 // 随机色
18 #define YYRandomColor [UIColor colorWithRed:arc4random_uniform(256)/255.0 green:arc4random_uniform(256)/255.0 blue:arc4random_uniform(256)/255.0 alpha:1.0]
19
20 // 是否为iOS7
21 #define iOS7 ([[UIDevice currentDevice].systemVersion doubleValue] >= 7.0)
22 #endif