[iOS UI进阶 - 2.0] 彩票Demo v1.0

A.需求

1.模仿“网易彩票”做出有5个导航页面和相应功能的Demo

2.v1.0 版本搭建基本框架

code source:https://github.com/hellovoidworld/HelloLottery

B.搭建基本框架

1.拖入TaBarController，5个NavigationController和对应的5个UIViewController

2.配置图标和启动画面

AppIcon直接拖入图片

LaunchImage在Xcode6中需要先更改启动图使用图库的图片，而不是LaunchImage.xib

2.引入图片包

4. 按照模块分类代码包

3.底部导航--自定义TabBar

（1）基本设计

a.自定义HVWTabBarController、继承自UIView的HVWTabBar、继承UIButton的HVWTabBarButton

b.在自定义TabBar控制器viewDidLoad，删除原来的TabBar，加上自定义的TabBar

c.加入自定义的按钮图片、选中图片

d.选中事件，转换图片

e.按下马上激发按钮激发

重写TabBarButton的[button setHighlighted:]取消高亮状态

HVWTabBarButton:

 // 覆盖setHighlighted,取消点击时的高亮状态
 - (void)setHighlighted:(BOOL)highlighted {
 //    [super setHighlighted:highlighted];
 }

初步实现都在HVWTabBarController的viewDidLoad方法中:

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view.

     // 1.删除原来的TabBar
     [self.tabBar removeFromSuperview];

     // 2.添加自定义TabBar
     HVWTabBar *hvwTabBar = [[HVWTabBar alloc] init];
     hvwTabBar.frame = self.tabBar.frame;
     hvwTabBar.backgroundColor = [UIColor greenColor]; // 设置绿色底的tabBar，稍后会被按钮图片覆盖
     [self.view addSubview:hvwTabBar];

     // 3.添加按钮
     for (int i=; i<; i++) {
         // 3.1创建按钮
         HVWTabBarButton *button = [HVWTabBarButton buttonWithType:UIButtonTypeCustom];
         button.tag = i;

         // 3.2设置按钮背景图片
         [button setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"TabBar%d", i+]] forState:UIControlStateNormal];

         [button setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"TabBar%dSel", i+]]  forState:UIControlStateSelected];

         // 3.3设置frame
         CGFloat buttonWidth = hvwTabBar.frame.size.width / ;
         CGFloat buttonHeight = hvwTabBar.frame.size.height;
         CGFloat buttonX = i * buttonWidth;
         CGFloat buttonY = ;
         button.frame = CGRectMake(buttonX, buttonY, buttonWidth, buttonHeight);

         // 3.4添加到tabBar
         [hvwTabBar addSubview:button];

         // 3.5添加监听事件
         [button addTarget:self action:@selector(tabBarButtonClicked:) forControlEvents:UIControlEventTouchUpInside];

         // 3.6默认已经点击了第一个按钮
         if (i == ) {
             [self tabBarButtonClicked:button];
         }
     }
 }

 - (void) tabBarButtonClicked:(HVWTabBarButton *) button {
     // 1.取消选中之前的按钮
     self.selectedButton.selected = NO;

     // 2.选中新点击的按钮
     button.selected = YES;

     // 3.设置为当前选中的按钮
     self.selectedButton = button;

     // 4.切换子控制器
     self.selectedIndex = button.tag;
 }

（2）封装TabBar代码

a.重写initWithFrame:创建初始化TabBar

b.移动子控件的初始化代码到layoutSubviews

c.通过代理转换Navigation页面

d.封装添加按钮函数

 //
 //  HWTabBarController.m
 //  HelloLottery
 //
 //  Created by hellovoidworld on 14/12/31.
 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 //

 #import "HvWTabBarController.h"
 #import "HVWTabBar.h"
 #import "HVWTabBarButton.h"

 @interface HVWTabBarController () <HVWTabBarDelegate>

 @end

 @implementation HVWTabBarController

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view.

     // 1.删除原来的TabBar
     [self.tabBar removeFromSuperview];

     // 2.添加自定义TabBar
     HVWTabBar *hvwTabBar = [[HVWTabBar alloc] init];
     hvwTabBar.frame = self.tabBar.frame;
     hvwTabBar.backgroundColor = [UIColor greenColor]; // 设置绿色底的tabBar，稍后会被按钮图片覆盖
     hvwTabBar.delegate = self;
     [self.view addSubview:hvwTabBar];
 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 #pragma mark - HVWTabBarDelegate 代理方法
 - (void)hvwTabBar:(HVWTabBar *)hvwTabBar didClickedButtonFrom:(int)from to:(int)to {
     // 切换子控制器
     self.selectedIndex = to;
 }

 @end

 //
 //  HVWTabBar.h
 //  HelloLottery
 //
 //  Created by hellovoidworld on 14/12/31.
 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 //

 #import <UIKit/UIKit.h>

 @class HVWTabBar;

 /** 代理协议 */
 @protocol HVWTabBarDelegate <NSObject>
 @optional
 - (void) hvwTabBar:(HVWTabBar *) hvwTabBar didClickedButtonFrom:(int) from to:(int) to;
 @end

 @interface HVWTabBar : UIView

 /** 代理 */
 @property(nonatomic, weak) id<HVWTabBarDelegate> delegate;

 @end

 //
 //  HVWTabBar.m
 //  HelloLottery
 //
 //  Created by hellovoidworld on 14/12/31.
 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 //

 #import "HVWTabBar.h"
 #import "HVWTabBarButton.h"

 #define HVWTabBarButtonCount 5

 @interface HVWTabBar()

 @property(nonatomic, weak) HVWTabBarButton *selectedButton;

 @end

 @implementation HVWTabBar

 // 重写initWithFrame方法，添加tabBar按钮
 - (instancetype)initWithFrame:(CGRect)frame {
     if (self = [super initWithFrame:frame]) {
         [self initButtons];
     }

     return self;
 }

 /** 初始化按钮 */
 - (void) initButtons {
     for (int i=; i<HVWTabBarButtonCount; i++) {
         // 3.1创建按钮
         HVWTabBarButton *button = [HVWTabBarButton buttonWithType:UIButtonTypeCustom];
         button.tag = i;

         // 3.2设置按钮背景图片
         [button setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"TabBar%d", i+]] forState:UIControlStateNormal];

         [button setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"TabBar%dSel", i+]]  forState:UIControlStateSelected];

         // 3.3添加到tabBar
         [self addSubview:button];

         // 3.4添加监听事件
         [button addTarget:self action:@selector(tabBarButtonClicked:) forControlEvents:UIControlEventTouchUpInside];

         // 3.5默认已经点击了第一个按钮
         if (i == ) {
             [self tabBarButtonClicked:button];
         }
     }
 }

 /** 初始化子控件的位置尺寸 */
 - (void)layoutSubviews {
     [super layoutSubviews];

     for (int i=; i<HVWTabBarButtonCount; i++) {
         HVWTabBarButton *button = self.subviews[i];
         CGFloat buttonWidth = self.frame.size.width / ;
         CGFloat buttonHeight = self.frame.size.height;
         CGFloat buttonX = i * buttonWidth;
         CGFloat buttonY = ;
         button.frame = CGRectMake(buttonX, buttonY, buttonWidth, buttonHeight);
     }
 }

 - (void) tabBarButtonClicked:(HVWTabBarButton *) button {
     // 1.调用代理方法，通知TabBarController切换子控制器
     if ([self.delegate respondsToSelector:@selector(hvwTabBar:didClickedButtonFrom:to:)]) {
         [self.delegate hvwTabBar:self didClickedButtonFrom:self.selectedButton.tag to:button.tag];
     }

     // 2.取消选中之前的按钮
     self.selectedButton.selected = NO;

     // 3.选中新点击的按钮
     button.selected = YES;

     // 4.设置为当前选中的按钮
     self.selectedButton = button;
 }

 @end

4.头部Navigation导航栏主题设置

（1）让applicatoin管理状态栏

（2）Navigation导航栏背景图片

（3）统一设置所有Navigation导航栏

[UINavigationBar appearance]; // 所有Navigation导航栏（头部导航栏）

（4）设置所有Navigation导航栏字体颜色

（5）根据系统版本，设置Navigation导航栏背景图片

（6）在二级页面隐藏底部导航条，重写导航控制器的push方法

a.自定义一个导航控制器HVWNavigationController类，重写push，隐藏底部导航栏

b.设置为每个NavigationController的class

c.导航控制器类的initialize只会在类第一次使用的时候调用一次

所以，导航栏的主题设置可以放在initialize方法中

解决：

（1）使用application管理状态栏

设置不使用控制器控制状态栏

在AppDelegate中设置：

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     // Override point for customization after application launch.

     // 设置状态栏样式为白色
     application.statusBarStyle = UIStatusBarStyleLightContent;

     return YES;
 }

（2）创建自定义NavigationController类，并设置5个Navigation控制器的class为此类

（3）不要删除原来的tabBar，而是覆盖它，才能控制push事件中底部导航栏

HVWTabBarController:

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view.

     // 1.添加自定义TabBar
     HVWTabBar *hvwTabBar = [[HVWTabBar alloc] init];
     hvwTabBar.frame = self.tabBar.bounds;
     hvwTabBar.delegate = self;

     // 2.设置tabBar
     [self.tabBar addSubview:hvwTabBar];
 }

（4）在NavigationController中编写类初始化方法和重写push方法

 //
 //  HVWNavigationController.m
 //  HelloLottery
 //
 //  Created by hellovoidworld on 15/1/1.
 //  Copyright (c) 2015年 hellovoidworld. All rights reserved.
 //

 #import "HVWNavigationController.h"

 @interface HVWNavigationController ()

 @end

 @implementation HVWNavigationController

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view.

 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 /** 类初始化方法，仅调用一次 */
 + (void) initialize {
     // 获取能够控制所有NavigationBar的实例
     UINavigationBar *navBar = [UINavigationBar appearance];

     // 设置背景图片
     NSString *bgImageName;
     if (iOS7) { // 在HelloLottery-Prefix.pch中定义了判断iOS版本的全局变量
         bgImageName = @"NavBar64";
     } else {
         bgImageName = @"NavBar";
     }

     [navBar setBackgroundImage:[UIImage imageNamed:bgImageName] forBarMetrics:UIBarMetricsDefault];

     // 设置文本
     NSMutableDictionary *attr = [NSMutableDictionary dictionary];
     attr[NSForegroundColorAttributeName] = [UIColor whiteColor];
     attr[NSFontAttributeName] = [UIFont systemFontOfSize:];
     [navBar setTitleTextAttributes:attr];
 }

 // 拦截所有的push操作
 - (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {
     viewController.hidesBottomBarWhenPushed = YES; // 这是原来NavigationController中的tabBar，所以要设置自定义的tabBar为Navigation中的tabBar
     [super pushViewController:viewController animated:YES];
 }

 @end