iOS - 初级封装

1 //  AppDelegate.h - 版本1
2 //  Emo微博
3 
4 #import <UIKit/UIKit.h>
5 
6 @interface AppDelegate : UIResponder <UIApplicationDelegate>
7 @property (strong, nonatomic) UIWindow *window;
8 @end

 1 //  AppDelegate.m - 版本1
 2 //  Emo微博
 3 
 4 #import "AppDelegate.h"
 5 #import "EmoTabBarController.h"
 6 // 封装思想：如果以后项目中，有相同的功能，抽取一个类，封装好，如何封装，自己的事情全部交给自己管理。
 7 // 抽方法：一般一个功能就抽一个方法。
 8 
 9 @interface AppDelegate ()
10 @end
11 
12 @implementation AppDelegate
13 
14 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
15     // Override point for customization after application launch.
16     
17     // 创建窗口
18     self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
19     // 创建tabBarVc
20     EmoTabBarController *tabBarVc = [[EmoTabBarController alloc] init];
21     // 设置窗口的根控制器
22     self.window.rootViewController = tabBarVc;
23     // 显示窗口
24     [self.window makeKeyAndVisible];
25     
26     return YES;
27 }
28 @end

1 //  EmoTabBarController.h - 版本1
2 //  Emo微博
3 
4 #import <UIKit/UIKit.h>
5 
6 @interface EmoTabBarController : UITabBarController
7 @end

 1 //  EmoTabBarController.m - 版本1
 2 //  Emo微博
 3 #import "EmoTabBarController.h"
 4 
 5 @interface EmoTabBarController()
 6 @end
 7 
 8 @implementation EmoTabBarController
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     [self setUpAllChildViewController];
13 }
14 
15 - (void)setUpAllChildViewController
16 {
17 
18     // 首页
19     UIViewController *home = [[UIViewController alloc] init];
20     home.tabBarItem.title = @"首页";
21     home.tabBarItem.image = [UIImage imageNamed:@"tabbar_home"];
22  // home.tabBarItem.selectedImage = [UIImage imageNamed:@"tabbar_home_selected"];//仅仅是这句话那么图片控件会被系统默认为是蓝色。
23     UIImage*selImage = [UIImage imageNamed:@"tabbar_home_selected"];
24     selImage = [selImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
25     home.tabBarItem.selectedImage =selImage;
26     home.view.backgroundColor = [UIColor greenColor];
27     [self addChildViewController:home];  
28 
29     // 消息
30     UIViewController *message = [[UIViewController alloc] init];
31     message.tabBarItem.title = @"消息";
32     message.view.backgroundColor = [UIColor blueColor];
33     message.tabBarItem.image = [UIImage imageNamed:@"tabbar_message"];
34     UIImage*selImage = [UIImage imageNamed:@"tabbar_message_selected"];
35     selImage = [selImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
36     home.tabBarItem.selectedImage =selImage;
37     [self addChildViewController:home];      
38 
39     // 发现
40     UIViewController *discover= [[UIViewController alloc] init];
41     discover.tabBarItem.title = @"发现";
42     discover.view.backgroundColor = [UIColor redColor];
43     discover.tabBarItem.image = [UIImage imageNamed:@"tabbar_discover"];
44     UIImage*selImage = [UIImage imageNamed:@"tabbar_discover_selected"];
45     selImage = [selImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
46     discover.tabBarItem.selectedImage =selImage;
47     [self addChildViewController:home];   
48 
49     // 我
50     UIViewController *profile= [[UIViewController alloc] init];
51     profile.tabBarItem.title = @"我";
52     profile.view.backgroundColor = [UIColor blueColor];
53     profile.tabBarItem.image = [UIImage imageNamed:@"tabbar_profile"];
54     UIImage*selImage = [UIImage imageNamed:@"tabbar_profile_selected"];
55     selImage = [selImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
56     discover.tabBarItem.selectedImage =selImage;
57     [self addChildViewController:home];   
58 
59 }
60 @end

1 //  UIImage+Image.h - 版本1
2 //  Emo微博
3 
4 #import <UIKit/UIKit.h>
5 
6 @interface UIImage (Image)
7 + (instancetype)imageWithOriginalName:(NSString *)imageName;
8 @end

 1 //  UIImage+Image.m - 版本1
 2 //  Emo微博
 3 
 4 #import "UIImage+Image.h"
 5 @implementation UIImage (Image)
 6 
 7 // 抽取出来后改写为“+ (instancetype)imageWithOriginalName:(NSString *)imageName”
 8 // UIImage*selImage = [UIImage imageNamed:@"tabbar_home_selected"];
 9 // selImage = [selImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
10 // home.tabBarItem.selectedImage =selImage;
11 
12 + (instancetype)imageWithOriginalName:(NSString *)imageName
13 {
14     UIImage *image = [UIImage imageNamed:imageName];
15     return [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
16 }
17 
18 @end

 1 //  EmoTabBarController.m - 版本2
 2 //  Emo微博
 3 
 4 #import "EmoTabBarController.h"
 5 #import "UIImage+Image.h"
 6 
 7 @interface EmoTabBarController ()
 8 @end
 9 
10 @implementation EmoTabBarController
11 
12 - (void)viewDidLoad {
13     [super viewDidLoad];
14     // Do any additional setup after loading the view.
15     
16     // 添加所有子控制器
17     [self setUpAllChildViewController];
18 
19 }
20 // 在ios7之后，默认会把UITabBar上面的按钮图片渲染成蓝色
21 #pragma mark - 添加所有的子控制器
22 - (void)setUpAllChildViewController
23 {
24     // 首页
25     UIViewController *home = [[UIViewController alloc] init];
26     home.tabBarItem.title = @"首页";
27     home.tabBarItem.image = [UIImage imageNamed:@"tabbar_home"];
28     // 调用子类"UImage+image“的方法”imageWithOriginalName“并传入参数
29     home.tabBarItem.selectedImage = [UIImage imageWithOriginalName:@"tabbar_home_selected"];
30     home.view.backgroundColor = [UIColor greenColor];
31     [self addChildViewController:home];
32     
33     // 消息
34     UIViewController *message = [[UIViewController alloc] init];
35     message.tabBarItem.title = @"首页";
36     message.tabBarItem.image = [UIImage imageNamed:@"tabbar_message"];
37     message.tabBarItem.selectedImage = [UIImage imageWithOriginalName:@"tabbar_message_selected"];
38     message.view.backgroundColor = [UIColor greenColor];
39     [self addChildViewController:message];
40     
41     // 发现
42     UIViewController *discover = [[UIViewController alloc] init];
43     discover.tabBarItem.title = @"首页";
44     discover.tabBarItem.image = [UIImage imageNamed:@"tabbar_discover"];
45     discover.tabBarItem.selectedImage = [UIImage imageWithOriginalName:@"tabbar_discover_selected"];
46     discoverview.backgroundColor = [UIColor greenColor];
47     [self addChildViewController:discover];
48     
49     // 我
50     UIViewController *profile = [[UIViewController alloc] init];
51     profile.tabBarItem.title = @"首页";
52     profile.tabBarItem.image = [UIImage imageNamed:@"tabbar_profile"];
53     profile.tabBarItem.selectedImage = [UIImage imageWithOriginalName:@"tabbar_profile_selected"];
54     profile.view.backgroundColor = [UIColor greenColor];
55     [self addChildViewController:profile ];
56 }
57 
58 @end

 1 //  EmoTabBarController.m - 版本3
 2 //  传智微博
 3 
 4 
 5 #import "EmoTabBarController.h"
 6 #import "UIImage+Image.h"
 7 
 8 @interface EmoTabBarController ()
 9 @end
10 
11 @implementation EmoTabBarController
12 
13 - (void)viewDidLoad {
14     [super viewDidLoad];
15     // Do any additional setup after loading the view.
16     
17     // 添加所有子控制器
18     [self setUpAllChildViewController];
19 
20 }
21 
22 // 如果通过模型设置控件的文字颜色，只能通过文本属性（富文本：颜色，字体，空心，阴影，图文混排）
23 // 在ios7之后，默认会把UITabBar上面的按钮图片渲染成蓝色
24 #pragma mark - 添加所有的子控制器
25 - (void)setUpAllChildViewController
26 {
27     // 首页
28     UIViewController *home = [[UIViewController alloc] init];
29     // imageWithOriginalName:这个参数只能改变选中的按钮图片不为系统默认的蓝色，但是按钮的文字改不了，要在下面的封装部分修改。
30     [self setUpOneChildViewController:home image:[UIImage imageNamed:@"tabbar_home"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_home_selected"] title:@"首页"];
31     home.view.backgroundColor = [UIColor greenColor];
32     
33     // 消息
34     UIViewController *message = [[UIViewController alloc] init];
35     [self setUpOneChildViewController:message image:[UIImage imageNamed:@"tabbar_message_center"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_message_center_selected"] title:@"消息"];
36     message.view.backgroundColor = [UIColor blueColor];
37     
38     // 发现
39     UIViewController *discover = [[UIViewController alloc] init];
40     [self setUpOneChildViewController:discover image:[UIImage imageNamed:@"tabbar_discover"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_discover_selected"] title:@"发现"];
41     discover.view.backgroundColor = [UIColor purpleColor];
42     
43 
44     // 我
45     UIViewController *profile = [[UIViewController alloc] init];
46     [self setUpOneChildViewController:profile image:[UIImage imageNamed:@"tabbar_profile"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_profile_selected"] title:@"我"];
47     profile.view.backgroundColor = [UIColor lightGrayColor];
48 }
49 
50 #pragma mark - 添加一个子控制器
51 - (void)setUpOneChildViewController:(UIViewController *)vc image:(UIImage *)image selectedImage:(UIImage *)selectedImage title:(NSString *)title
52 {
53     // 待传进标题
54     vc.tabBarItem.title = title;
55     // 待传进正常状态下的图片
56     vc.tabBarItem.image = image;
57     // 下面三行是让按钮的文字也变成窗口的颜色
58     NSMutableDictionary *att = [NSMutableDictionary dictionary];
       // [NSForegroundColorAttributeName]传key，[UIColor orangeColor]传 value。
59     att[NSForegroundColorAttributeName] = [UIColor orangeColor];
60     [vc.tarBarItem.setTitleTextAttributes:att forState: UIControlStateSelected];
61     // 让所有子控制器都显示10条显示
62     vc.tabBarItem.badgeValue = @"10";
63     // 传进选中时显示的图片
64     vc.tabBarItem.selectedImage = selectedImage;
65 
66     [self addChildViewController:vc];
67 }
68 
69 @end

 1 // EmoTabBarController.m - 版本4
 2 // Emo微博
 3 
 4 #import "EmoTabBarController.h"
 5 #import "UIImage+Image.h"
 6 
 7 @interface EmoTabBarController ()
 8 @end
 9 
10 @implementation EmoTabBarController
11 
12 // 什么时候调用：当第一次使用这个类或者子类的时候调用
13 // ”+ (void)initialize{}“作用：类的初始化，其实”+ (void)load{}“也是可以初始化类的
14 + (void)initialize
15 {
16     // 获取所有的tabBarItem外观标识，appearance只要一个类遵守UIAppearance，就能获取全局的外观，UIView
18     // 获取方法一：
19     // UITabBarItem *item = [UITabBarItem appearance];
20     //为什么不用方法一的原因是：所有文件中，只要是协议里的 tabBarItem 都会被修改
21 
22     // 方法二：
23     // self是指向EmoTabBarController
24     // 下面的代码意思是：仅仅获取当前这个类下面的所有tabBarItem，对其他文件中的 tabBarItem 无效。
25     UITabBarItem *item = [UITabBarItem appearanceWhenContainedIn:self, nil];
26     
27     NSMutableDictionary *att = [NSMutableDictionary dictionary];
28     att[NSForegroundColorAttributeName] = [UIColor orangeColor];
29     [item setTitleTextAttributes:att forState:UIControlStateSelected];
30 }
31 
32 - (void)viewDidLoad {
33     [super viewDidLoad];
34     // Do any additional setup after loading the view.
35     
36     // 添加所有子控制器
37     [self setUpAllChildViewController];
38 }
39 
40 // 如果通过模型设置控件的文字颜色，只能通过文本属性（富文本：颜色，字体，空心，阴影，图文混排）
41 // 在ios7之后，默认会把UITabBar上面的按钮图片渲染成蓝色
42 #pragma mark - 添加所有的子控制器
43 - (void)setUpAllChildViewController
44 {
45     // 首页
46     UIViewController *home = [[UIViewController alloc] init];
47     [self setUpOneChildViewController:home image:[UIImage imageNamed:@"tabbar_home"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_home_selected"] title:@"首页"];
48     home.view.backgroundColor = [UIColor greenColor];
49     
50     // 消息
51     UIViewController *message = [[UIViewController alloc] init];
52     [self setUpOneChildViewController:message image:[UIImage imageNamed:@"tabbar_message_center"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_message_center_selected"] title:@"消息"];
53     message.view.backgroundColor = [UIColor blueColor];
54     
55     // 发现
56     UIViewController *discover = [[UIViewController alloc] init];
57     [self setUpOneChildViewController:discover image:[UIImage imageNamed:@"tabbar_discover"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_discover_selected"] title:@"发现"];
58     discover.view.backgroundColor = [UIColor purpleColor];
59      
61     // 我
62     UIViewController *profile = [[UIViewController alloc] init];
63     [self setUpOneChildViewController:profile image:[UIImage imageNamed:@"tabbar_profile"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_profile_selected"] title:@"我"];
64     profile.view.backgroundColor = [UIColor lightGrayColor];
65 }
66 
67 #pragma mark - 添加一个子控制器
68 - (void)setUpOneChildViewController:(UIViewController *)vc image:(UIImage *)image selectedImage:(UIImage *)selectedImage title:(NSString *)title
69 {
70     vc.tabBarItem.title = title;
71     vc.tabBarItem.image = image;
72     //***此处被剪切到上面作为全局效果***//
73     vc.tabBarItem.badgeValue = @"10";
74     vc.tabBarItem.selectedImage = selectedImage;
75     [self addChildViewController:vc];
76 }
77 
79 @end

1 //  EmoTabBar.h - 版本1
2 //  Emo微博
3 
4 #import <UIKit/UIKit.h>
5 
6 @interface EmoTabBar : UITabBar
7 @end

 1 //  EmoTabBar.m - 版本1
 2 //  Emo微博
 3 
 4 #import "EmoTabBar.h"
 5 @interface EmoTabBar ()
 6 @property (nonatomic, weak) UIButton *plusButton;
 7 @end
 8 
 9 @implementation EmoTabBar
10 
11 - (UIButton *)plusButton
12 {
13     if (_plusButton == nil) {
14         
15         UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
16         [btn setImage:[UIImage imageNamed:@"tabbar_compose_icon_add"] forState:UIControlStateNormal];
17         [btn setImage:[UIImage imageNamed:@"tabbar_compose_background_icon_add"] forState:UIControlStateHighlighted];
18         [btn setBackgroundImage:[UIImage imageNamed:@"tabbar_compose_button"] forState:UIControlStateNormal];
19         [btn setBackgroundImage:[UIImage imageNamed:@"tabbar_compose_button_highlighted"] forState:UIControlStateHighlighted];
20         
21         // 默认按钮的尺寸跟背景图片一样大
22         // sizeToFit:默认会根据按钮的背景图片或者image和文字计算出按钮的最合适的尺寸
23         [btn sizeToFit];
24         
25         _plusButton = btn;
26         
27         [self addSubview:_plusButton];
28         
29     }
30     return _plusButton;
31 }
32 
33 // self.items UITabBarItem模型，有多少个子控制器就有多少个UITabBarItem模型
34 // 调整子控件的位置
35 - (void)layoutSubviews
36 {
37     [super layoutSubviews];
38     
39     CGFloat w = self.bounds.size.width;
40     CGFloat h = self.bounds.size.height;
41     
42     CGFloat btnX = 0;
43     CGFloat btnY = 0;
44     CGFloat btnW = w / (self.items.count + 1);
45     CGFloat btnH = self.bounds.size.height;
46     
47     int i = 0;
48    // 调整系统自带的tabBar上的按钮位置
49     for (UIView *tabBarButton in self.subviews) {
50         // 判断下是否是UITabBarButton
51         if ([tabBarButton isKindOfClass:NSClassFromString(@"UITabBarButton" )]) {
52             if (i == 2) {
53                 i = 3;
54             }
55             btnX = i * btnW;
56             
57             tabBarButton.frame = CGRectMake(btnX, btnY, btnW, btnH);
58             
59             i++;
60         }
61     }
62     
63     
64     // 设置添加按钮的位置
65     self.plusButton.center = CGPointMake(w * 0.5, h * 0.5);
66 }
67 
68 @end

  1 //  EmoTabBarController.m - 版本5
  2 //  Emo微博
  3 
  4 
  5 #import "EmoTabBarController.h"
  6 #import "UIImage+Image.h"
  7 #import "EmoTabBar.h"
  8 
  9 #import <objc/message.h>
 10 
 11 @interface EmoTabBarController ()
 12 @end
 13 
 14 @implementation EmoTabBarController
 15 
 16 // 什么调用：当第一次使用这个类或者子类的时候调用
 17 // 作用：初始化类
 18 // appearance只要一个类遵守UIAppearance，就能获取全局的外观，UIView
 19 + (void)initialize
 20 {
 21     // 获取所有的tabBarItem外观标识
 22 //    UITabBarItem *item = [UITabBarItem appearance];
 23     
 24     // self -> CZTabBarController
 25     // 获取当前这个类下面的所有tabBarItem
 26     UITabBarItem *item = [UITabBarItem appearanceWhenContainedIn:self, nil];
 27     
 28     NSMutableDictionary *att = [NSMutableDictionary dictionary];
 29     att[NSForegroundColorAttributeName] = [UIColor orangeColor];
 30     //    [att setObject:[UIColor orangeColor] forKey:NSForegroundColorAttributeName];
 31     
 32     [item setTitleTextAttributes:att forState:UIControlStateSelected];
 33 }
 34 
 35 - (void)viewDidLoad {
 36     [super viewDidLoad];
 37     // Do any additional setup after loading the view.
 38     // 添加所有子控制器
 39     [self setUpAllChildViewController];
 40     // 自定义tabBar
 41     EmoTabBar *tabBar = [[EmoTabBar alloc] initWithFrame:self.tabBar.frame];
 42     NSLog(@"%@",self.tabBar);
 43     // 利用KVC把readly的属性改
 44     [self setValue:tabBar forKeyPath:@"tabBar"];
 45     // objc_msgSend(self, @selector(setTabBar:),tabBar);//xcode 不希望用户使用消息机制
 46     NSLog(@"%@",self.tabBar);
 47     // self.tabBar = tabBar;
 48     // 修改系统tabBar上面的按钮的位置
 49 //    NSLog(@"%@",self.tabBar.subviews);
 50 //    
 51 //    self.tabBar =
 52 }
 53 
 54 - (void)viewWillAppear:(BOOL)animated
 55 {
 56     [super viewWillAppear:animated];
 57 
 58 }
 59 
 60 // 如果通过模型设置控件的文字颜色，只能通过文本属性（富文本：颜色，字体，空心，阴影，图文混排）
 61 
 62 // 在ios7之后，默认会把UITabBar上面的按钮图片渲染成蓝色
 63 #pragma mark - 添加所有的子控制器
 64 - (void)setUpAllChildViewController
 65 {
 66     // 首页
 67     UIViewController *home = [[UIViewController alloc] init];
 68     [self setUpOneChildViewController:home image:[UIImage imageNamed:@"tabbar_home"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_home_selected"] title:@"首页"];
 69     home.view.backgroundColor = [UIColor greenColor];
 70     
 71     // 消息
 72     UIViewController *message = [[UIViewController alloc] init];
 73     [self setUpOneChildViewController:message image:[UIImage imageNamed:@"tabbar_message_center"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_message_center_selected"] title:@"消息"];
 74     message.view.backgroundColor = [UIColor blueColor];
 75     
 76     // 发现
 77     UIViewController *discover = [[UIViewController alloc] init];
 78     [self setUpOneChildViewController:discover image:[UIImage imageNamed:@"tabbar_discover"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_discover_selected"] title:@"发现"];
 79     discover.view.backgroundColor = [UIColor purpleColor];
 80     
 81 
 82     // 我
 83     UIViewController *profile = [[UIViewController alloc] init];
 84     [self setUpOneChildViewController:profile image:[UIImage imageNamed:@"tabbar_profile"] selectedImage:[UIImage imageWithOriginalName:@"tabbar_profile_selected"] title:@"我"];
 85     profile.view.backgroundColor = [UIColor lightGrayColor];
 86 }
 87 
 88 #pragma mark - 添加一个子控制器
 89 - (void)setUpOneChildViewController:(UIViewController *)vc image:(UIImage *)image selectedImage:(UIImage *)selectedImage title:(NSString *)title
 90 {
 91     vc.tabBarItem.title = title;
 92     vc.tabBarItem.image = image;
 93     vc.tabBarItem.badgeValue = @"10";
 94     vc.tabBarItem.selectedImage = selectedImage;
 95 
 96     [self addChildViewController:vc];
 97 }
 98 
 99 
100 @end