补充下https://www.jianshu.com/p/2dece6f94abc~
例如，UIImage实例对象分类：
#import<UIKit/UIKit.h>
NS_ASSUME_NONNULL_BEGIN
@interfaceUIImage(theme)
@property(strong,nonatomic)NSString*imageName;
+ (UIImage *)imageWithKey:(NSString*)namecontainer:(id)view;
@end
NS_ASSUME_NONNULL_END
#import"UIImage+theme.h"
#import<objc/runtime.h>
#import"UIView+RefreshTheme.h"
#import"ThemeManager.h"
staticNSString*imageNameKey =@"imageNameKey";
@implementationUIImage(theme)
- (void)setImageName:(NSString*)imageName{
objc_setAssociatedObject(self, &imageNameKey,imageName,OBJC_ASSOCIATION_COPY);
}
- (NSString*)imageName{
returnobjc_getAssociatedObject(self, &imageNameKey);
}
+ (UIImage *)imageWithName:(NSString*)name{
UIImage *image = [UIImageimageNamed:[[ThemeManager getCurrentThemeImageData]objectForKey:name]];
if(!image) {
return[UIImageimageNamed:name];
}
image.imageName= name;
returnimage;
}
+ (UIImage *)imageWithKey:(NSString*)namecontainer:(id)view{
UIImage *image = [UIImage imageNamed:[[ThemeManager getCurrentThemeImageData]objectForKey:name]];
if(!image) {
return[UIImageimageNamed:name];
}
image.imageName= name;
UIView *img = view;
img.imageName= name;
returnimage;
}
@end
例如UIView分类如下：
@implementationUIView(RefreshTheme)
- (void)didMoveToSuperview{
if(!isStartTheme) {
return;
}
NSMutableArray*arr = [ThemeManager getThemeViews];
if(!arr) {
arr = [NSMutableArraynew];
}
if(![arrcontainsObject:self]) {
//NSLog(@"1%@ ---- 2%@ ---- 3%@",self.colorName,self.textColorName,self.imageName);
[arraddObject:self];
//}
[ThemeManager setThemeViews:arr];
}
}
- (void)traitCollectionDidChange:(nullable UITraitCollection *)previousTraitCollection{
if(!isStartTheme) {
return;
}
if(@available(iOS13.0, *)) {
if([self.traitCollectionhasDifferentColorAppearanceComparedToTraitCollection:previousTraitCollection]) {
if(self.traitCollection.userInterfaceStyle== UIUserInterfaceStyleDark) {
NSLog(@暗黑模式");
[ThemeManager refreshTheme:@"ThemeType_DarkMode"];
}else{
NSLog(@" 普通模式");
[ThemeManager refreshTheme:@"ThemeType_Default"];
}
}
}
}
@end
例如Thememanager主要做了如下工作：
#define Image(x,y) [UIImage imageWithKey:x container:y] //图片
+ (NSDictionary*)getCurrentThemeImageData{
NSString*themeKey = [[NSUserDefaultsstandardUserDefaults]objectForKey:ThemeKey];
if([themeKeyisEqualToString:ThemeDefault]) {
themeKey = ThemeImageDefault;
}else{
themeKey = ThemeImageDark;
}
NSString*strPath = [[NSBundlemainBundle]pathForResource:themeKeyofType:@"json"];
NSString*parseJason = [[NSStringalloc]initWithContentsOfFile:strPathencoding:NSUTF8StringEncodingerror:nil];
NSData*data = [parseJasondataUsingEncoding:NSUTF8StringEncoding];
idjsonObject = [NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableContainerserror:nil];
returnjsonObject;// 看具体协议结构
}
+ (void)refreshTheme:(NSString*)themeKey{
NSString*themeLOCAL = [[NSUserDefaultsstandardUserDefaults]objectForKey:ThemeKey];
if([themeLOCALisEqualToString:themeKey]) {
return;
}
[[NSUserDefaultsstandardUserDefaults]setObject:themeKeyforKey:ThemeKey];
if(!themeViews) {
return;
}
for(id container in themeViews) {
if([containerisKindOfClass:[UIButtonclass]]) {
UIButton *btn = container;
//color
if(btn.colorName) {
btn.backgroundColor=BgColor(btn.colorName, btn);
}
if(btn.textColorName) {
[btn setTitleColor:TextColor(btn.textColorName, btn)forState:UIControlStateNormal];
}
//image
if(btn.currentImage.imageName) {
[btn setImage:Image(btn.imageView.image.imageName, btn)forState:UIControlStateNormal];
}
if(btn.currentBackgroundImage.imageName) {
[btn setBackgroundImage:Image(btn.currentBackgroundImage.imageName, btn)forState:UIControlStateNormal];
}
}elseif([containerisKindOfClass:[UIImageViewclass]]) {
UIImageView *img = container;
if(img.image.imageName) {
img.image=Image(img.image.imageName, img);
}
if(img.colorName) {
img.backgroundColor=BgColor(img.colorName, img);
}
}//......未继续补充
}
}
页面使用时，使用分类方法即可，例如：
img.image=Image(@"imageV", img);
还是轻量的很~
