自定义tabBar

  1 #import "KKTabBar.h"
  2 #import "UIView+Extension.h"
  3 
  4 @interface KKTabBar()
  5 
  6 @property (nonatomic, weak) UIButton *plusButton;
  7 
  8 
  9 @end
 10 
 11 @implementation KKTabBar
 12 
 13 
 14 
 15 - (instancetype)initWithFrame:(CGRect)frame{
 16     self = [super initWithFrame:frame];
 17     if (self) {
 18         
 19 //        self.backgroundImage = [UIImage imageNamed:@""];
 20 //        self.selectionIndicatorImage = [[UIImageb alloc]init];
 21 //        self.selectionIndicatorImage = [UIImage imageNamed:@"navigationbar_button_background_os7"];
 22         
 23         // 添加加号按钮
 24         [self setPlusButton];
 25     }
 26     return self;
 27 }
 28 
 29 // 添加加号按钮
 30 - (void)setPlusButton
 31 {
 32     UIButton *btn = [[UIButton alloc] init];
 33     
 34     [btn setBackgroundImage:[UIImage imageNamed:@"tabbar_compose_button"] forState:UIControlStateNormal];
 35     [btn setBackgroundImage:[UIImage imageNamed:@"tabbar_compose_button_highlighted"] forState:UIControlStateHighlighted];
 36     
 37     [btn setImage:[UIImage imageNamed:@"tabbar_compose_icon_add"] forState:UIControlStateNormal];
 38     [btn setImage:[UIImage imageNamed:@"tabbar_compose_icon_add_highlighted"] forState:UIControlStateHighlighted];
 39     
 40     [btn addTarget:self action:@selector(clickPlus:) forControlEvents:UIControlEventTouchUpInside];
 41     
 42     [self addSubview:btn];
 43     self.plusButton = btn;
 44     
 45 }
 46 
 47 - (void)clickPlus:(UIButton *)sender{
 48     
 49     NSLog(@"click-- plus");
 50     
 51     // 通知代理
 52     if ([self.tabBarDelegate respondsToSelector:@selector(tabBarDidPlusClick:)]) {
 53         [self.tabBarDelegate tabBarDidPlusClick:self];
 54     }
 55     
 56 }
 57 
 58 /**
 59  *  布局子控件
 60  */
 61 - (void)layoutSubviews
 62 {
 63     [super layoutSubviews];
 64     
 65     // 设置plusButton的frame
 66     [self setupPlusButtonFrame];
 67     
 68     // 设置所有tabbarButton的frame
 69     [self setupAllTabBarButtonsFrame];
 70 }
 71 
 72 /**
 73  *  设置所有plusButton的frame
 74  */
 75 - (void)setupPlusButtonFrame
 76 {
 77     self.plusButton.size = self.plusButton.currentBackgroundImage.size;
 78     self.plusButton.center = CGPointMake(self.width * .5, self.height * .5);
 79 }
 80 
 81 /**
 82  *  设置所有tabbarButton的frame
 83  */
 84 - (void)setupAllTabBarButtonsFrame
 85 {
 86     int index = 0;
 87     
 88     // 遍历所有的button
 89     for (UIView *tabBarButton in self.subviews) {
 90         // 如果不是UITabBarButton， 直接跳过
 91         if (![tabBarButton isKindOfClass:NSClassFromString(@"UITabBarButton")]) continue;
 92         
 93         // 根据索引调整位置
 94         [self setupTabBarButtonFrame:tabBarButton atIndex:index];
 95         
 96         // 索引增加
 97         index++;
 98     }
 99 }
100 
101 /**
102  *  设置某个按钮的frame
103  *
104  *  @param tabBarButton 需要设置的按钮
105  *  @param index        按钮所在的索引
106  */
107 - (void)setupTabBarButtonFrame:(UIView *)tabBarButton atIndex:(int)index
108 {
109     // 计算button的尺寸
110     CGFloat buttonW = self.width / (self.items.count + 1);
111     CGFloat buttonH = self.height;
112     
113     tabBarButton.width = buttonW;
114     tabBarButton.height = buttonH;
115     if (index >= 2) {
116         tabBarButton.x = buttonW * (index + 1);
117     } else {
118         tabBarButton.x = buttonW * index;
119     }
120     tabBarButton.y = 0;
121 }
122 
123 @end

1 #import <UIKit/UIKit.h>
2 
3 @interface KKTabBarController : UITabBarController
4 
5 @end

 1 #import "KKTabBarController.h"
 2 #import "OneViewController.h"
 3 #import "TwoViewController.h"
 4 #import "ThreeViewController.h"
 5 #import "FourViewController.h"
 6 #import "KKTabBar.h"
 7 
 8 @interface KKTabBarController ()
 9 
10 @end
11 
12 @implementation KKTabBarController
13 
14 - (instancetype)init
15 {
16     self = [super init];
17     if (self) {
18         
19         
20         NSLog(@" KKTabBarController  init");
21     }
22     return self;
23 }
24 
25 - (void)viewWillAppear:(BOOL)animated{
26     [super viewWillAppear:animated];
27     
28 //    NSLog(@"%@",self.tabBar.subviews);
29     
30     
31 }
32 
33 - (void)viewDidLoad {
34     [super viewDidLoad];
35     
36     
37     KKTabBar *tab = [[KKTabBar alloc] init];
38     
39     // 更换系统默认的tabBar
40     [self setValue:tab forKeyPath:@"tabBar"];
41     
42     OneViewController *one = [[OneViewController alloc] init];
43     [self addChildVc:one title:@"首页" image:@"tabbar_home" selectedImage:@"tabbar_home_selected_os7"];
44     
45     TwoViewController *two = [[TwoViewController alloc] init];
46     [self addChildVc:two title:@"信息" image:@"tabbar_message_center_os7" selectedImage:@"tabbar_message_center_selected_os7"];
47     
48     ThreeViewController *three = [[ThreeViewController alloc] init];
49     [self addChildVc:three title:@"发现" image:@"tabbar_discover_os7" selectedImage:@"tabbar_discover_selected_os7"];
50     
51     FourViewController *four = [[FourViewController alloc] init];
52     [self addChildVc:four title:@"我" image:@"tabbar_profile_os7" selectedImage:@"tabbar_profile_selected_os7"];
53 
54     
55 }
56 
57 - (void)addChildVc:(UIViewController *)childVc title:(NSString *)title image:(NSString *)image selectedImage:(NSString *)selectedImage{
58 
59     // 放弃系统默认渲染方式
60     UIImage *selectImg = [[UIImage imageNamed:selectedImage] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
61     
62     childVc.title = title;
63     childVc.tabBarItem.image = [UIImage imageNamed:image];
64     childVc.tabBarItem.selectedImage = selectImg;
65     
66     // 设置字体默认颜色
67     NSMutableDictionary *dic = [NSMutableDictionary dictionary];
68     dic[NSForegroundColorAttributeName] = [UIColor blackColor];
69     [childVc.tabBarItem setTitleTextAttributes:dic forState:UIControlStateNormal];
70     
71     // 设置字体选中颜色
72     NSMutableDictionary *selectDic = [NSMutableDictionary dictionary];
73     selectDic[NSForegroundColorAttributeName] = [UIColor orangeColor];
74     [childVc.tabBarItem setTitleTextAttributes:selectDic forState:UIControlStateSelected];
75     
76     [self addChildViewController:childVc];
77 }
78 
79 
80 - (void)didReceiveMemoryWarning {
81     [super didReceiveMemoryWarning];
82     // Dispose of any resources that can be recreated.
83 }
84 
85 /*
86 #pragma mark - Navigation
87 
88 // In a storyboard-based application, you will often want to do a little preparation before navigation
89 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
90     // Get the new view controller using [segue destinationViewController].
91     // Pass the selected object to the new view controller.
92 }
93 */
94 
95 @end