本文主要实现主题换肤的管理以及两个常用控件的封装
<h5>大致思路：</h5>
1.建立一个单例类（ThemeManager）专门用来进行主题皮肤的管理，专门负责查找图片和颜色。
2.封装出需要换肤的主要控件，包括UIButton、UIImageView等，方便在以后调用。
3.应用到各个控制器中。</br>
<h5>一、ThemeManager的实现</h5>
1.思路分析：</br>
(1)这是一个单例类，提供相同且唯一的实例。
(2)它只做两件事，一是查找图片，二查找颜色。
2.具体实现：
//.h文件
//1.设置属性
@property (copy, nonatomic) NSString *themeName;
@property (strong , nonatomic) ThemeManager *manager;
@property (strong, nonatomic) NSDictionary *colorDic;
//2.方法声明
+ (id) shareThemeManger;
//找图片
- (UIImage *) getImageWithImageName:(NSString *) imageName;
//找颜色
- (UIColor *)getThemeColorWithColorName:(NSString *) colorName;
//.m文件
//构造方法的实现
+ (id) shareThemeManger {
//设置静态变量为空
static ThemeManager *instance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
instance = [[ThemeManager alloc] init];
});
return instance;
}
//初始化
- (instancetype) init {
self = [super init];
if (self) {
//存储当前主题
_themeName = [[NSUserDefaults standardUserDefaults]objectForKey:@"themeInfo"];
if (_themeName == nil) {
//设置默认主题
_themeName = @"猫爷";
}
[self loadConfig];
}
return self;
}
//加载主题路径
- (NSString *) loadThemePath {
//图片保存的路径是“.../Skins/主题名字”
//查找plist文件
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Theme.plist" ofType:nil];
//获取主题
NSDictionary *DicTheme = [NSDictionary dictionaryWithContentsOfFile:filePath];
//获取主题的短路径“/Skins/主题名字”
NSString *themePath = [DicTheme objectForKey:_themeName];
//拼接完整路径--将短路径拼接在大的路径后面
NSString *path = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:themePath];
return path;
}
//得到图片名字
- (UIImage *) getImageWithImageName:(NSString *) imageName {
//获取主题完整路径
NSString *themePath = [self loadThemePath];
//查找图片路径
NSString *imgPath = [themePath stringByAppendingPathComponent:imageName];
return [UIImage imageWithContentsOfFile:imgPath];
}
//复写ThemeName的set方法
- (void) setThemeName:(NSString *)themeName {
//判断主题名字是否改变
if (_themeName != themeName) {
_themeName = themeName;
//将改变后的主题存进UserDefault中
NSUserDefaults *userD = [NSUserDefaults standardUserDefaults];
[userD synchronize];//立即存储
[userD setObject:_themeName forKey:@"themeInfo"];
}
//改变就发送通知
[[NSNotificationCenter defaultCenter] postNotificationName:@"ThemeChange" object:nil];
}
//获取config.plist---颜色
- (void) loadConfig {
//拿到主题的完整路径
NSString *themePath = [self loadThemePath];
//获取config.plist文件
NSString *filePath = [themePath stringByAppendingPathComponent:@"config.plist"];
//获取plist文件中的字典
_colorDic = [NSDictionary dictionaryWithContentsOfFile:filePath];
}
//找颜色
- (UIColor *)getThemeColorWithColorName:(NSString *) colorName {
NSDictionary *rgbDic = _colorDic[colorName];
double R = [rgbDic[@"R"] doubleValue];
double G = [rgbDic[@"G"] doubleValue];
double B = [rgbDic[@"B"] doubleValue];
//判断一下有没有alpha,没有的话默认为1
double alpha = [rgbDic[@"alpha"] doubleValue] ? : 1;
return [UIColor colorWithRed:R/255 green:G/255 blue:B/255 alpha:alpha];
}
</br>
<h5>二、控件的封装</h5></br>
<h6>1.ThemeButton的封装</h6></br>
//设置属性--图片名
@property (nonatomic, strong) NSString *imageName;
//导入头文件
#import "ThemeManager.h"
- (void) setImageName:(NSString *)imageName {
if (_imageName != imageName) {
_imageName = imageName;
}
[self loadImage];
}
//加载图片
- (void) loadImage {
ThemeManager *manager = [ThemeManager shareThemeManger];
//调用getImageWithImageName:方法
[self setImage:[manager getImageWithImageName:_imageName] forState:UIControlStateNormal];
}
//初始化
- (instancetype) initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
//接收通知并实现方法，这里再次调用图片加载方法
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loadImage) name:@"ThemeChange" object:nil];
}
return self;
}
<h6>2..ThemeImageView的封装</h6>
@property (nonatomic, strong) NSString *imageName;
- (void) setImageName:(NSString *)imageName {
if (_imageName != imageName) {
_imageName = imageName;
}
[self loadImage];
}
- (void) loadImage {
ThemeManager *manager = [ThemeManager shareThemeManger];
UIImage *img =[manager getImageWithImageName:_imageName];
self.image = [img stretchableImageWithLeftCapWidth:30 topCapHeight:30];
}
//初始化
- (instancetype) initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loadImage) name:@"ThemeChange" object:nil];
}
return self;
}
- (void) dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"ThemeChange" object:nil];
}
<h5>三、应用</h5>
//设置标签栏背景图片
ThemeImageView *backImgView = [[ThemeImageView alloc] initWithFrame:CGRectMake(0, -6, kScreenWidth, 55)];
backImgView.imageName = @"图片名";
[self.tabBar addSubview:backImgView];
float width = kScreenWidth/imaArr.count;
//创建button
for (int i=0; i < imaArr.count; i++) {
NSString *imageName = imaArr[i];
ThemeButton *button = [ThemeButton buttonWithType:UIButtonTypeCustom];
button.imageName = imageName;
button.frame = CGRectMake(i*width, 2, width, 45);
button.tag = 2016 + i;
[button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
[self.tabBar addSubview:button];
}
//设置选中图片
_selectedImage = [[ThemeImageView alloc] initWithFrame:CGRectMake(0, 4, width, 45)];
_selectedImage.imageName = @"图片名";
[self.tabBar addSubview:_selectedImage];
//设置内容视图背景图片
- (void) viewDidLoad {
//1.加载图片
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(loadImag) name:@"ThemeChange" object:nil];
[self loadImag];
}
- (void)loadImag{
UIImage*img = [[ThemeManager shareThemeManger] getImageWithImageName:@"图片名"];
self.view.backgroundColor = [UIColor colorWithPatternImage:img];
}
- (void)dealloc{
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"ThemeChange" object:nil];
}
//设置导航栏背景图片
- (void) viewDidLoad {
//设置标题颜色
self.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName:[UIColor whiteColor],
NSFontAttributeName : [UIFont boldSystemFontOfSize:20]};
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(loadImg) name:@"ThemeChange" object:nil];
[self loadImg];
}
- (void)loadImg{
ThemeManager *manager = [ThemeManager shareThemeManger];
UIImage *img = [manager getImageWithImageName:@"图片名"];
//设置背景颜色
[self.navigationBar setBackgroundImage:img forBarMetrics:UIBarMetricsDefault];
}
- (void)dealloc{
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"ThemeChange" object:nil];
}
