#import "AppDelegate.h"
#import "CRITabBarController.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
/*————————————————————————————————————————————————————————————————————————*/
NSMutableArray *viewControllers = [NSMutableArray array];
NSArray *titles = @[@"主页",@"信息",@"购票",@"发现",@"商店"];
NSArray *imgNames = @[@"home",@"myinfo",@"payticket",@"discover",@"store"];
for (int i = 0; i<5; i++) {
//假设 2个导航控制器 3个视图控制器
UIViewController *viewController = nil;
UIViewController *vc = [[UIViewController alloc]init];
vc.title = titles[i];
vc.tabBarItem.image = [UIImage imageNamed:imgNames[i]];
vc.tabBarItem.selectedImage = [UIImage imageNamed:[NSString stringWithFormat:@"%@_on",imgNames[i]]];
vc.view.backgroundColor = [UIColor colorWithRed:arc4random()%256/255.0 green:arc4random()%256/255.0 blue:arc4random()%256/255.0 alpha:1];
viewController = vc;
if (i<2) {
UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:vc];
viewController = nav;
}
[viewControllers addObject:viewController];
}
//标签
CRITabBarController *tabbar = [[CRITabBarController alloc]init];
tabbar.tabBar.selectionIndicatorImage = [UIImage imageNamed:@"选中"];
tabbar.tabBar.backgroundImage = [UIImage imageNamed:@"tab_bg_all"];
tabbar.viewControllers = viewControllers;
tabbar.selectedIndex = 3;
self.window.rootViewController = tabbar;
return YES;
}
#import//自定义的标签控制器类
@interface CRITabBarController : UITabBarController
@end
//自定义的垂直button类
@interface VerticalButton : UIButton
@end
#import "CRITabBarController.h"#define kTabBarWidth self.tabBar.frame.size.width#define kTabBarHeight self.tabBar.frame.size.height#define kButtonWidth kTabBarWidth/self.viewControllers.count@interface CRITabBarController (){ UIImageView *_selectImgV;}@property (nonatomic,strong) NSMutableArray *tabBarButtons;@end@implementation CRITabBarController- (instancetype)init{ self = [super init]; if (self) { _tabBarButtons = [NSMutableArray array]; } return self;}- (void)viewWillAppear:(BOOL)animated{ [super viewWillAppear:animated]; /** * 8.当控制器的tabbar执行 setSelectionIndicatorImage:方法的时候 我们才有的选中图片 但是我们无法进入self.tabbar的文件内部去复写这个方法 所以在控制器完全加载完成 即将显示的时候创建,因为这时候,控制器个数+按钮宽度+选中的控制器 都确定了 */ //检查是否有选中图片 UIImage *selectionIndicatorImage = self.tabBar.selectionIndicatorImage; //如果没有 return 什么都不做 if (selectionIndicatorImage == nil)return; //如果有图片:创建选中图片-> 图片+frame _selectImgV = [[UIImageView alloc]initWithImage:selectionIndicatorImage]; _selectImgV.frame = CGRectMake(self.selectedIndex * kButtonWidth, 0, kButtonWidth, kTabBarHeight); [self.tabBar insertSubview:_selectImgV atIndex:0]; //将选中的button高亮 UIButton *selectButton = self.tabBarButtons[self.selectedIndex]; selectButton.selected = YES; }/** * 外部给本标签控制器 子控制器数组赋值的方法 */- (void)setViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers{ [super setViewControllers:viewControllers]; /*————————————————————————————————————————————————————————————————————————*/ //1.标签控制器已经有了N个子视图控制器 for (UIView *subView in self.tabBar.subviews) { //2.标签栏上创建的是 UITabBarButton ,这个类是内部类,我们无法使用,所以移除原有按钮 [subView removeFromSuperview]; } //3.添加自定义按钮 for (int i = 0; i标签项->图片+标题 ->用于button的图片+标题
UIImage *image = subVC.tabBarItem.image;
UIImage *selectImage = subVC.tabBarItem.selectedImage;
NSString *title = subVC.tabBarItem.title;
//4.普通button的图片和标题是水平排布的,不符合我们的要求,--->自定义垂直排布的button
[button setImage:image forState:UIControlStateNormal];
[button setImage:selectImage forState:UIControlStateSelected];
[button setTitle:title forState:UIControlStateNormal];
[self.tabBar addSubview:button];
[self.tabBarButtons addObject:button];//✅将按钮交给数组管理
//7.添加事件,将按钮添加 切换视图控制器的功能
[button addTarget:self action:@selector(selectedVC:) forControlEvents:UIControlEventTouchUpInside];
button.tag = 100+i;
}
}
/**
* 点击按钮调用的方法
*/
- (void)selectedVC:(UIButton *)button{
//7.1 修改标签控制器的本身具有的 selectedIndex 完成切换功能
self.selectedIndex = button.tag -100;
//10.将除了选中的button之外的按钮选中状态改为no
for (UIButton *btn in self.tabBarButtons) {
btn.selected = NO;
}
button.selected = YES;
//9.切换控制器的 选中图片动画
[UIView animateWithDuration:0.3 animations:^{
_selectImgV.frame = CGRectMake(self.selectedIndex * kButtonWidth, _selectImgV.frame.origin.y, _selectImgV.frame.size.width, _selectImgV.frame.size.height);
}];
}
- (void)viewDidLoad {
[super viewDidLoad];
}
@end
#pragma mark -- 垂直布局的Button
@interface VerticalButton ()
{
UILabel *_subLabel;//按钮的标题
UIImageView *_subImageView;//按钮的图片视图
UIImage *_normalImg;//保存默认图片
UIImage *_selectImg;//保存选中图片
}
@end
@implementation VerticalButton
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
//5. 创建子视图 Label 上 + ImageView 下
_subLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height * 0.3)];
_subLabel.textAlignment = NSTextAlignmentCenter;
_subLabel.textColor = [UIColor whiteColor];
_subLabel.font = [UIFont systemFontOfSize:12];
[self addSubview:_subLabel];
_subImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, _subLabel.frame.size.height, frame.size.width, frame.size.height *0.7)];
_subImageView.contentMode = UIViewContentModeCenter;
[self addSubview:_subImageView];
}
return self;
}
//6.截获button的 图片和标题 的赋值方法,将图片和标题用于 Label + ImageView
- (void)setSelected:(BOOL)selected{
[super setSelected:selected];
if (self.selected == YES) {
_subImageView.image = _selectImg;
}else{
_subImageView.image = _normalImg;
}
}
- (void)setImage:(UIImage *)image forState:(UIControlState)state{
if (state == UIControlStateNormal) {
//保存默认图片
_normalImg = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
[_subImageView setImage:_normalImg];
}else if (state == UIControlStateSelected){
//保存选中图片
_selectImg = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
}
}
- (void)setTitle:(NSString *)title forState:(UIControlState)state{
if (state == UIControlStateNormal) {
//保存标题
[_subLabel setText:title];
}
}
@end
