iOS 13 黑夜模式适配 （runtime）
#import "UIView+UIView_Black.h"
@implementationUIView(UIView_Black)
+ (void)load
{
staticdispatch_once_tonceToken;
dispatch_once(&onceToken, ^{
idobj = [[selfalloc]init];
[objswizzleMethod:@selector(setBackgroundColor:)withMethod:@selector(blackSetBackgroundColor:)];
});
}
- (void)blackSetBackgroundColor:(UIColor*)backgroundColor{
if(@available(iOS13.0, *)) {
UIColor*color = [UIColorcolorWithDynamicProvider:^UIColor*_Nonnull(UITraitCollection*_NonnulltraitCollection) {
if (traitCollection.userInterfaceStyle == UIUserInterfaceStyleDark) {
if(backgroundColor == [UIColorwhiteColor]) {
return[UIColorblackColor];
}else{
if(backgroundColor) {
returnbackgroundColor;
}else{
return[UIColorclearColor];
}
}
}else{
if(backgroundColor) {
returnbackgroundColor;
}else{
return[UIColorclearColor];
}
}
}];
return [self blackSetBackgroundColor:color];
}else{
return[selfblackSetBackgroundColor:backgroundColor];
}
}
- (void)swizzleMethod:(SEL)origSelectorwithMethod:(SEL)newSelector
{
Classcls = [selfclass];
MethodoriginalMethod =class_getInstanceMethod(cls, origSelector);
MethodswizzledMethod =class_getInstanceMethod(cls, newSelector);
BOOLdidAddMethod =class_addMethod(cls,
origSelector,
method_getImplementation(swizzledMethod),
method_getTypeEncoding(swizzledMethod));
if(didAddMethod) {
class_replaceMethod(cls,
newSelector,
method_getImplementation(originalMethod),
method_getTypeEncoding(originalMethod));
}else{
method_exchangeImplementations(originalMethod, swizzledMethod);
}
}
@end
