iOS主题皮肤切换示例Demo下载 一步一步实现主题切换

1. 主题皮肤功能切换介绍

主题切换就是根据用户设置不同的主题，来动态改变用户的界面，通常会改变 navigationBar背景图片、 tabBar背景图片、 tabBar中的按钮的图片和选中的背景图片、 navigationItem.title 标题的字体颜色、 UI中其他元素控件

下载源代码地址：  http://download.csdn.net/detail/vbirdbest/9421136

2.项目目录结构及实现效果截图

3. 具体实现步骤

1.将image文件夹（group）和 Skins拖入到项目工程中的资源文件夹中

2.创建BaseViewController

3.配置theme.plist

4.事项项目所需的基本框架供能，并实现主题的tableView功能

5.创建主题管理器：ThemeManager

6.自定义ThemeTabBarItem 控件

7.创建UI工厂： UIFactory

8. 实现tableView中的didSelected事件完成主题切换

9.记录用户选择的主题，以便用户下次启动时是上次设置的主题

1.创建BaseViewController

#import <UIKit/UIKit.h>

@interface BaseViewController : UIViewController


- (void) reloadThemeImage;
@end

#import "BaseViewController.h"

#import "ThemeManager.h"
#import "NotificationMacro.h"

@interface BaseViewController ()

@end

@implementation BaseViewController
- (id) init {
    if (self == [super init]) {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(themeChangedNotfication:) name:kThemeChangedNotification object:nil];
    }
    
    [self reloadThemeImage];
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    [self reloadThemeImage];
}

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

- (void) themeChangedNotfication:(NSNotification *)notification {
    [self reloadThemeImage];
}

- (void) reloadThemeImage {
    ThemeManager * themeManager = [ThemeManager sharedThemeManager];
    
    UIImage * navigationBackgroundImage = [themeManager themeImageWithName:@"navigationbar_background.png"];
    [self.navigationController.navigationBar setBackgroundImage:navigationBackgroundImage forBarMetrics:UIBarMetricsDefault];
    
    UIImage * tabBarBackgroundImage = [themeManager themeImageWithName:@"tabbar_background.png"];
    [self.tabBarController.tabBar setBackgroundImage:tabBarBackgroundImage];
}
@end

2. 实现AppDelegate

#import "AppDelegate.h"

#import "MainViewController.h"
#import "ThemeManager.h"
#import "NotificationMacro.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [self initUserDefaultConfig];
    
    MainViewController * rootViewController = [[MainViewController alloc] init];
    self.window.rootViewController = rootViewController;
    
    return YES;
}


- (void) initUserDefaultConfig {
    NSString * themeName = [[NSUserDefaults standardUserDefaults] objectForKey:kThemeNameKey];
    ThemeManager * themeManager = [ThemeManager sharedThemeManager];
    themeManager.themeName = themeName;
}</span></span>

<span style="font-weight: normal;"><span style="font-weight: normal;">#import "MainViewController.h"

#import "HomeViewController.h"
#import "MessageViewController.h"
#import "MineViewController.h"

#import "UIFactory.h"


@interface MainViewController ()

@end

@implementation MainViewController

- (id) init {
    if (self = [super init]) {
        [self initTabBarUI];
    }
    
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}


- (void) initTabBarUI {
    // 主页
    HomeViewController * homeViewController = [[HomeViewController alloc] init];
    UINavigationController * homeNavigationController = [[UINavigationController alloc] initWithRootViewController:homeViewController];
//    UITabBarItem * homeTabBarItem = [[UITabBarItem alloc] initWithTitle:@"主页" image:[UIImage imageNamed:@"tabbar_home"] selectedImage:[UIImage imageNamed:@"tabbar_home_selected"]];
    UITabBarItem * homeTabBarItem = [UIFactory createTabBarItemWithTitle:@"主页" imageName:@"tabbar_home" selectedImage:@"tabbar_home_selected"];
    homeNavigationController.tabBarItem = homeTabBarItem;
    
    // 消息（中心）
    MessageViewController * messageViewController = [[MessageViewController alloc] init];
    UINavigationController * messageNavigationController = [[UINavigationController alloc] initWithRootViewController:messageViewController];
//    UITabBarItem * messageTabBarItem = [[UITabBarItem alloc] initWithTitle:@"消息" image:[UIImage imageNamed:@"tabbar_message_center"] selectedImage:[UIImage imageNamed:@"tabbar_message_center_selected"]];
    UITabBarItem * messageTabBarItem = [UIFactory createTabBarItemWithTitle:@"消息" imageName:@"tabbar_message_center" selectedImage:@"tabbar_message_center_selected"];
    messageNavigationController.tabBarItem = messageTabBarItem;
    
    // 我
    MineViewController * mineViewController = [[MineViewController alloc] init];
    UINavigationController * mineNavigationController = [[UINavigationController alloc] initWithRootViewController:mineViewController];
//    UITabBarItem * mineTabBarItem = [[UITabBarItem alloc] initWithTitle:@"我" image:[UIImage imageNamed:@"tabbar_profile"] selectedImage:[UIImage imageNamed:@"tabbar_profile_selected"]];
    UITabBarItem * mineTabBarItem = [UIFactory createTabBarItemWithTitle:@"我" imageName:@"tabbar_profile" selectedImage:@"tabbar_profile_selected"];
    
    
    mineNavigationController.tabBarItem = mineTabBarItem;
    NSArray * viewControllers = @[homeNavigationController, messageNavigationController, mineNavigationController];
    self.viewControllers = viewControllers;
}


@end

3. 创建主题管理器 

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface ThemeManager : NSObject

@property (nonatomic, copy) NSString * themeName;           // 主题名字
@property (nonatomic, retain) NSDictionary * themePlistDict;    // 主题属性列表字典

+ (ThemeManager *) sharedThemeManager;

- (UIImage *) themeImageWithName:(NSString *)imageName;
@end</span></span>

<span style="font-weight: normal;"><span style="font-weight: normal;">#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface ThemeManager : NSObject

@property (nonatomic, copy) NSString * themeName;           // 主题名字
@property (nonatomic, retain) NSDictionary * themePlistDict;    // 主题属性列表字典

+ (ThemeManager *) sharedThemeManager;

- (UIImage *) themeImageWithName:(NSString *)imageName;
@end
#import "ThemeManager.h"
#import "NotificationMacro.h"
static ThemeManager * sharedThemeManager;

@implementation ThemeManager

- (id) init {
    if(self = [super init]) {
        NSString * themePath = [[NSBundle mainBundle] pathForResource:@"theme" ofType:@"plist"];
        self.themePlistDict = [NSDictionary dictionaryWithContentsOfFile:themePath];
        self.themeName = nil;
    }
    
    return self;
}

+ (ThemeManager *) sharedThemeManager {
    @synchronized(self) {
        if (nil == sharedThemeManager) {
            sharedThemeManager = [[ThemeManager alloc] init];
        }
    }
    
    return sharedThemeManager;
}

// Override 重写themeName的set方法
- (void) setThemeName:(NSString *)themeName {
    _themeName = themeName;
}

- (UIImage *) themeImageWithName:(NSString *)imageName {
    if (imageName == nil) {
        return nil;
    }
    
    NSString * themePath = [self themePath];
    NSString * themeImagePath = [themePath stringByAppendingPathComponent:imageName];
    UIImage * themeImage = [UIImage imageWithContentsOfFile:themeImagePath];
    
    return themeImage;
}

// 返回主题路径
- (NSString *)themePath {
    NSString * resourcePath = [[NSBundle mainBundle] resourcePath];
    if (self.themeName == nil || [self.themeName isEqualToString:@""]) {
        return resourcePath;
    }
    
    
    NSString * themeSubPath = [self.themePlistDict objectForKey:self.themeName];    // Skins/blue
    NSString * themeFilePath = [resourcePath stringByAppendingPathComponent:themeSubPath]; // .../Skins/blue
    
    return themeFilePath;
}
@end

4. 创建主题按钮 ThemeTabBarItem

#import <UIKit/UIKit.h>

@interface ThemeTabBarItem : UITabBarItem

@property (nonatomic, copy) NSString * imageName;
@property (nonatomic, copy) NSString * selectedImageName;


- (id) initWithTitle:(NSString *)title imageName:(NSString *)imageName selectedImage:(NSString *)selectedImageName;

@end </span></span>

<span style="font-weight: normal;"><span style="font-weight: normal;">#import "ThemeTabBarItem.h"
#import "ThemeManager.h"
#import "NotificationMacro.h"

@implementation ThemeTabBarItem

// 初始化时注册观察者
- (id) init {
    if (self = [super init]) {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(themeChangedNotification:) name:kThemeChangedNotification object:nil];
    }
    
    return self;
}

- (id) initWithTitle:(NSString *)title imageName:(NSString *)imageName selectedImage:(NSString *)selectedImageName {
    if (self = [self init]) {
        self.title = title;
        self.imageName = imageName;         // 此时会调用[self setImageName:imageName] ---> [self reloadThemeImage] --->[self setImage:image]
        self.selectedImageName = selectedImageName;// 此时会调用[self setSelectedImageName:selectedImageName];
    }
    
    return self;
}


#pragma mark -
#pragma mark - Override Setter
- (void) setImageName:(NSString *)imageName {
    if (_imageName != imageName) {
        _imageName = imageName;
    }
    
    [self reloadThemeImage];
}

- (void) setSelectedImageName:(NSString *)selectedImageName {
    if (_selectedImageName != selectedImageName) {
        _selectedImageName = selectedImageName;
    }
    
    [self reloadThemeImage];
}



// 主题改变之后重新加载图片
- (void)themeChangedNotification:(NSNotification *)notification {
    [self reloadThemeImage];
}

- (void)reloadThemeImage {
    ThemeManager * themeManager = [ThemeManager sharedThemeManager];
    
    if (self.imageName != nil) {
        UIImage * image = [themeManager themeImageWithName:self.imageName];
        [self setImage:image];
    }
    
    if (self.selectedImageName != nil) {
        UIImage * selectedImage = [themeManager themeImageWithName:self.selectedImageName];
        [self setSelectedImage:selectedImage];
    }
}




- (void) dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

5. 创建UI工厂

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface UIFactory : NSObject

+ (UITabBarItem *) createTabBarItemWithTitle:(NSString *)title imageName:(NSString *)imageName selectedImage:(NSString *)selectedImageName;


@end</span></span>

<span style="font-weight: normal;"><span style="font-weight: normal;">#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface UIFactory : NSObject

+ (UITabBarItem *) createTabBarItemWithTitle:(NSString *)title imageName:(NSString *)imageName selectedImage:(NSString *)selectedImageName;


@end
#import "UIFactory.h"

#import "ThemeTabBarItem.h"
@implementation UIFactory

+ (UITabBarItem *) createTabBarItemWithTitle:(NSString *)title imageName:(NSString *)imageName selectedImage:(NSString *)selectedImageName {
    ThemeTabBarItem * themeTabBarItem = [[ThemeTabBarItem alloc] initWithTitle:title imageName:imageName selectedImage:selectedImageName];
    
    return themeTabBarItem;
}
@end

6. 实现选中单元格的事件

#import "BaseViewController.h"

@interface MineViewController : BaseViewController <UITableViewDelegate, UITableViewDataSource>


@property (weak, nonatomic) IBOutlet UITableView *tableView;

@property (nonatomic, retain) NSMutableArray * themeDataSource;
@end

#import "BaseViewController.h"

@interface MineViewController : BaseViewController <UITableViewDelegate, UITableViewDataSource>


@property (weak, nonatomic) IBOutlet UITableView *tableView;

@property (nonatomic, retain) NSMutableArray * themeDataSource;
@end
#import "MineViewController.h"

#import "ThemeManager.h"
#import "NotificationMacro.h"

@interface MineViewController ()

@end

@implementation MineViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"我";
    
    ThemeManager * themeManager = [ThemeManager sharedThemeManager];
    _themeDataSource = [NSMutableArray arrayWithArray:themeManager.themePlistDict.allKeys];
}

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



#pragma mark -
#pragma mark - UITableViewDelegate
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    return self.themeDataSource.count;
}

- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString * Identifier = @"Cell";
    UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:Identifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:Identifier];
    }
    
    NSString * text = self.themeDataSource[indexPath.row];
    cell.textLabel.text = text;
    
    ThemeManager * themeManager = [ThemeManager sharedThemeManager];
    NSString * currentTheme = themeManager.themeName;
    if (currentTheme == nil) {
        currentTheme = @"默认";
    }
    if ([currentTheme isEqualToString:text]) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    } else {
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
    
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    
    ThemeManager * themeManager = [ThemeManager sharedThemeManager];
    NSString * themeName = self.themeDataSource[indexPath.row];
    
    if ([themeName isEqualToString:@"默认"]) {
        themeName = nil;
    }
    
    // 记录当前主题名字
    themeManager.themeName = themeName;
    [[NSNotificationCenter defaultCenter] postNotificationName:kThemeChangedNotification object:nil];
    
    
    // 主题持久化
    NSUserDefaults * userDefaults = [NSUserDefaults standardUserDefaults];
    [userDefaults setObject:themeName forKey:kThemeNameKey];
    [userDefaults synchronize];
    
    // 重新加载数据显示UITableViewCellAccessoryCheckmark 显示选中的对号 v
    [self.tableView reloadData];
}