iOS 开发中有时候会有夜间模式(换肤设置)的需求, 其实主要是更改相关颜色操作!
思路:每次切换夜间/白天模式时，都会发出通知给所有ViewController，让它们切换到相应的主题。
1.创建一个管理模式主题的单例管理类ThemeManage
2.封装好需要做夜间模式变色处理的控件扩展:UIView (ThemeChange), UINavigationBar (ThemeChange), UITabBar (ThemeChange), UILabel (ThemeChange), UIButton (ThemeChange)
3.在 AppDelegate里先获取夜间模式状态, 根控制器里先设置tabBar 及 子控制器里navigationBar的夜间模式状态
4.添加控制白天/黑夜模式item,发通知切换相对应i模式及image
5.添加相关控件是否黑夜模式下已更换字色和背景色
一. 创建一个管理模式主题的单例管理类ThemeManage
ThemeManage.h 文件:
@interfaceThemeManage:NSObject
#pragmamark - 颜色属性
@property(nonatomic,retain)UIColor*bgColor;
@property(nonatomic,retain)UIColor*color1;
@property(nonatomic,retain)UIColor*color2;
@property(nonatomic,retain)UIColor*textColor;
@property(nonatomic,retain)UIColor*textColorGray;
@property(nonatomic,retain)UIColor*navBarColor;
@property(nonatomic,retain)UIColor*colorClear;
#pragmamark -// 是否是夜间 YES表示夜间, NO为正常
@property(nonatomic,assign)BOOL isNight;/**
* 模式管理单例
*/+(ThemeManage*)shareThemeManage;
@end
ThemeManage. m 文件
#import"ThemeManage.h"
static ThemeManage*themeManage;// 单例
@implementationThemeManage
#pragmamark - 单例的初始化
+(ThemeManage*)shareThemeManage{
staticdispatch_once_t onceToken;dispatch_once(&onceToken,^{
themeManage=[[ThemeManage alloc]init];});
return themeManage;
}
#pragmamark 重写isNight的set方法
-(void)setIsNight:(BOOL)isNight{
_isNight=isNight;if(self.isNight){// 夜间模式改变相关颜色self.bgColor=[UIColor colorWithRed:0.06green:0.08blue:0.1alpha:1];self.textColor=[UIColor whiteColor];self.color1=[UIColor colorWithRed:0.08green:0.11blue:0.13alpha:1];self.navBarColor=[UIColor whiteColor];self.color2=[UIColor colorWithRed:0.2green:0.31blue:0.43alpha:1];self.textColorGray=[UIColor whiteColor];}else{self.bgColor=[UIColor whiteColor];self.textColor=[UIColor blackColor];self.color1=[UIColor colorWithRed:0.06green:0.25blue:0.48alpha:1];self.navBarColor=[UIColor colorWithRed:0.31green:0.73blue:0.58alpha:1];self.color2=[UIColor colorWithRed:0.57green:0.66blue:0.77alpha:1];self.textColorGray=[UIColor grayColor];}staticdispatch_once_t onceToken;dispatch_once(&onceToken,^{self.colorClear=[UIColor clearColor];});}@end
二. 封装好需要做夜间模式变色处理的控件扩展
一般需要UIView (ThemeChange), UINavigationBar (ThemeChange), UITabBar (ThemeChange), UILabel (ThemeChange), UIButton (ThemeChange);这里拿 UIView 做例子:
#import/**
* 颜色状态枚举值 颜色的定义(一个代表一套)
*/typedefNS_ENUM(NSInteger,UIViewColorType){UIViewColorTypeNormal,// 白天白色, 夜间黑色UIViewColorType1,// 白天蓝色, 夜间深灰UIViewColorType2,// 白天浅蓝, 夜间浅蓝UIViewColorTypeClear// 透明状态};@interfaceUIView(ThemeChange)// 定义颜色类型的属性, NSNumber类型@property(nonatomic,assign)id type;// 消息中心开始监听-(void)startMonitor;// 改变颜色的方法-(void)changeColor;// 设置颜色类型和对应颜色-(void)NightWithType:(UIViewColorType)type;// 设置字体颜色的方法-(void)initTextColor;@end
#import"UIView+ThemeChange.h"#import"ThemeManage.h"// 添加runtime头文件#import@implementationUIView(ThemeChange)#pragmamark - 添加type的set,get方法-(void)setType:(id)type{objc_setAssociatedObject(self,@selector(type),type,OBJC_ASSOCIATION_RETAIN_NONATOMIC);}-(id)type{returnobjc_getAssociatedObject(self,@selector(type));}#pragmamark - 开始监听-(void)startMonitor{[[NSNotificationCenter defaultCenter]addObserver:selfselector:@selector(changeColor)name:@"changeColor"object:nil];}#pragmamark - 改变颜色-(void)changeColor{// type为NSNumber型, 变为NSIntegerswitch([self.type integerValue]){caseUIViewColorTypeNormal:self.backgroundColor=[ThemeManage shareThemeManage].bgColor;break;caseUIViewColorType1:self.backgroundColor=[ThemeManage shareThemeManage].color1;break;caseUIViewColorType2:self.backgroundColor=[ThemeManage shareThemeManage].color2;break;caseUIViewColorTypeClear:self.backgroundColor=[ThemeManage shareThemeManage].colorClear;break;default:break;}}#pragmamark - 设置颜色类型和对应颜色-(void)NightWithType:(UIViewColorType)type{self.type=[NSNumber numberWithInteger:type];[selfchangeColor];[selfstartMonitor];// 调用设置字体颜色的方法[selfinitTextColor];}#pragmamark - 改变字体颜色的方法, 空方法, 可以在子类中重写这个方法来改变颜色(例如:Label)-(void)initTextColor{}@end
三. 在 AppDelegate里先获取夜间模式状态, 根控制器里先设置tabBar 及 子控制器里navigationBar的夜间模式状态
#import"ThemeManage.h"#import"UIView+ThemeChange.h"
-(BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions{// 获取夜间模式状态[ThemeManage shareThemeManage].isNight=[[NSUserDefaults standardUserDefaults]boolForKey:@"night"];self.window=[[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];self.window.backgroundColor=[UIColor whiteColor];[self.window makeKeyAndVisible];RootViewController*rootVc=[[RootViewController alloc]init];self.window.rootViewController=rootVc;returnYES;}
RootViewController.m 文件:
-(void)viewDidLoad{[superviewDidLoad];[self.view NightWithType:UIViewColorTypeNormal];HomeViewController*vc=[[HomeViewController alloc]init];UINavigationController*nav=[[UINavigationController alloc]initWithRootViewController:vc];// 设置navigationBar的夜间模式状态[nav.navigationBar NightWithType:UIViewColorTypeNormal];vc.tabBarItem=[[UITabBarItem alloc]initWithTitle:@"首页"image:[UIImage imageNamed:@"home"]tag:10];SchemaViewController*secondVC=[[SchemaViewController alloc]init];UINavigationController*nav1=[[UINavigationController alloc]initWithRootViewController:secondVC];// 设置navigationBar的夜间模式状态[nav1.navigationBar NightWithType:UIViewColorTypeNormal];secondVC.tabBarItem=[[UITabBarItem alloc]initWithTitle:@"菜单"image:[UIImage imageNamed:@"schema"]tag:11];[self.tabBar NightWithType:UIViewColorTypeNormal];self.viewControllers=@[nav,nav1];self.tabBar.translucent=NO;[[UINavigationBar appearance]setTranslucent:NO];}
四. 添加控制白天/黑夜模式item,发通知切换相对应i模式及image.
#import"ThemeManage.h"#import"UIView+ThemeChange.h"
[self.view NightWithType:UIViewColorTypeNormal];UIImage*barButtonImage=[ThemeManage shareThemeManage].isNight?[UIImage imageNamed:@"night"]:[UIImage imageNamed:@"day"];self.navigationItem.rightBarButtonItem=[[UIBarButtonItem alloc]initWithImage:barButtonImage style:UIBarButtonItemStylePlain target:selfaction:@selector(rightBarBtnAction:)];
#pragmamark - Action点击动作事件// 切换夜间模式-(void)rightBarBtnAction:(UIBarButtonItem*)barButton{[ThemeManage shareThemeManage].isNight=![ThemeManage shareThemeManage].isNight;[[NSNotificationCenter defaultCenter]postNotificationName:@"changeColor"object:nil];[[NSUserDefaults standardUserDefaults]setBool:[ThemeManage shareThemeManage].isNight forKey:@"night"];UIImage*barBtnImage=[ThemeManage shareThemeManage].isNight?[UIImage imageNamed:@"night"]:[UIImage imageNamed:@"day"];[barButton setImage:barBtnImage];}
发了通知不要忘记移除监听
-(void)dealloc{// 移除监听[[NSNotificationCenter defaultCenter]removeObserver:self];}
五. 添加相关控件是否黑夜模式下已更换字色和背景色
#import"UILabel+ThemeChange.h"
UILabel*label=[[UILabel alloc]initWithFrame:CGRectMake(100,100,200,40)];label.text=@"测试看看字色及背景色";[label NightWithType:UIViewColorTypeNormal];[label NightTextType:LabelColorGray];[self.view addSubview:label];
这时候测试下, 看下效果:
夜间模式.gif
Demo 下载请移步:夜间模式(换肤设置)
转自：https://www.jianshu.com/p/c8e638e76e83