함수 프로그래밍 사용자 정의 KVO
단계
People.h
# import
@interface People : NSObject
@property (nonatomic,strong) NSString *name;
@property (nonatomic,strong) NSString *age;
@end
KVOInfoModel.h
#import
typedef void(^KVOBlock) (id observer,NSString *keyPath,id newValue,id oldValue);
@interface KVOInfoModel : NSObject
@property (nonatomic, copy) NSString *keyPath;
@property (nonatomic, weak) NSObject *observer;
@property (nonatomic, copy) KVOBlock blockHandle;
- (instancetype)initWithObserver:(NSObject *)observer keyPath:(NSString *)keyPath observerHandle:(KVOBlock)blockHandle;
@end
KVOInfoModel.m
#import "KVOInfoModel.h"
@implementation KVOInfoModel
- (instancetype)initWithObserver:(NSObject *)observer keyPath:(NSString *)keyPath observerHandle:(KVOBlock)blockHandle{
if (self = [super init]) {
_keyPath = keyPath;
_observer = observer;
_blockHandle = blockHandle;
}
return self;
}
@end
NSObject(KVO)를 하나 더 추가합니다.h
#import
#import "KVOInfoModel.h"
@interface NSObject (KVO)
- (void)addObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath withBlock:(KVOBlock)block;
@end
NSObject (KVO) .m
#import "NSObject+KVO.h"
#import
#import "KVOInfoModel.h"
@implementation NSObject (KVO)
- (void)addObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath withBlock:(KVOBlock)block{
//1. SEL
SEL setterSeletor = NSSelectorFromString(setterfromGetter(keyPath));
Method setterMethod = class_getInstanceMethod(object_getClass(self), setterSeletor);
if (!setterMethod) {
@throw [NSException exceptionWithName:NSInvalidArgumentException reason:@" setter " userInfo:nil];
}
//2.
NSString *superClassName = NSStringFromClass([self class]);
Class newClas = [self creatClassFromSuperClass:superClassName];
//ias swilzing
object_setClass(self, newClas);
const char *types = method_getTypeEncoding(setterMethod);
//3:setter
class_addMethod(newClas, setterSeletor, (IMP)KVO_Setter, types);
//4;
KVOInfoModel *info = [[KVOInfoModel alloc] initWithObserver:observer keyPath:keyPath observerHandle:block];
NSMutableArray *obserArray = objc_getAssociatedObject(self, (__bridge const void * _Nonnull)(KVOAssioKey));
if (!obserArray) {
obserArray = [NSMutableArray arrayWithCapacity:1];
/**
1:
2:
3:
4:
*/
objc_setAssociatedObject(self, (__bridge const void * _Nonnull)(KVOAssioKey), obserArray, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
[obserArray addObject:info]; }
pragmamark - 함수 영역 /* name setName: */
static NSString * setterfromGetter(NSString * getter){
if (getter.length <= 0) {return nil;}
// name
NSString *firstString = [[getter substringToIndex:1] uppercaseString]; // N
NSString *leaveSTring = [getter substringFromIndex:1]; // ame
return [NSString stringWithFormat:@"set%@%@:",firstString,leaveSTring];
}
/* setName name */
static NSString *getterfromSetter(NSString * setter){
if (setter.length <= 0 || ![setter hasPrefix:@"set"] || ![setter hasSuffix:@":"]) { return nil;}
//setName: ===>> Name: ====> Name ==> name
NSRange range = NSMakeRange(3, setter.length-4);
NSString *getter = [setter substringWithRange:range];
NSString *firstString = [[getter substringToIndex:1] lowercaseString]; //n
getter = [getter stringByReplacingCharactersInRange:NSMakeRange(0, 1) withString:firstString];
return getter;
}
/* */
static Class KVC_Class(id self){
return class_getSuperclass(object_getClass(self));
}
- (Class)creatClassFromSuperClass:(NSString *)superName{
Class superClass = NSClassFromString(superName);
/**
1:
2:
3:
*/
// NSKVONotifiying_ ===>>> KCKVC_
NSString *newClassName = [KVOPre stringByAppendingString:superName];
Class newClass = NSClassFromString(newClassName);
if (newClass) {
return newClass;
}
newClass = objc_allocateClassPair(superClass, newClassName.UTF8String, 0);
// Class
Method classMethod = class_getClassMethod(superClass, @selector(class));
const char *type = method_getTypeEncoding(classMethod);
/**
1:
2:
3:IMP
4:
*/
class_addMethod(newClass, @selector(class), (IMP)KVC_Class, type);
//
objc_registerClassPair(newClass);
return newClass;
}
static void KVO_Setter(id self,SEL _cmd,id newValue){
//
//_cmd ===
NSString *setterName = NSStringFromSelector(_cmd);
NSString *getterName = getterfromSetter(setterName);
id oldValue = [self valueForKey:getterName];
[self willChangeValueForKey:getterName];
//
void(*KCMsgSend)(void *,SEL,id) = (void *)objc_msgSendSuper;
struct objc_super kcSuperStruct = {
.receiver = self,
.super_class = class_getSuperclass(object_getClass(self))
};
KCMsgSend(&kcSuperStruct,_cmd,newValue);
[self didChangeValueForKey:getterName];
NSMutableArray *obserArray = objc_getAssociatedObject(self, (__bridge const void * _Nonnull)(KVOAssioKey));
for (KVOInfoModel *info in obserArray) {
dispatch_async(dispatch_queue_create(0, 0), ^{
info.blockHandle(self, info.keyPath, newValue, oldValue);
});
}
}
@end
VC 콜백 KVO #import "ViewController.h"
#import "People.h"
#import "NSObject+KVO.h"
@interface ViewController ()
@property (nonatomic,strong) People *people;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.people = [[People alloc] init];
[self.people addObserver:self forKeyPath:@"name" withBlock:^(id observer, NSString *keyPath, id newValue, id oldValue) {
NSLog(@"%@==%@",newValue,oldValue);
}];
[self.people addObserver:self forKeyPath:@"age" withBlock:^(id observer, NSString *keyPath, id newValue, id oldValue) {
NSLog(@"%@==%@",newValue,oldValue);
}];
self.people.name = @"hanhan";
self.people.age = @"100";
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
self.people.name = [NSString stringWithFormat:@"%@+",self.people.name];
self.people.age = [NSString stringWithFormat:@"%@+",self.people.age];
}
- (void)dealloc{
[self.people removeObserver:self forKeyPath:@"name"];
}
이렇게 하면 사용자 정의 KVO를 실현할 수 있다. 면접에서 사용할 때 절대 6의 비교를 이루었고 프로젝트에 구체적으로 사용되지 않았다. 앞으로 계속 공부하고 자신을 계속 향상시킬 것이다.END
이 내용에 흥미가 있습니까?
현재 기사가 여러분의 문제를 해결하지 못하는 경우 AI 엔진은 머신러닝 분석(스마트 모델이 방금 만들어져 부정확한 경우가 있을 수 있음)을 통해 가장 유사한 기사를 추천합니다:
다양한 언어의 JSON
JSON은 Javascript 표기법을 사용하여 데이터 구조를 레이아웃하는 데이터 형식입니다.
그러나 Javascript가 코드에서 이러한 구조를 나타낼 수 있는 유일한 언어는 아닙니다.
저는 일반적으로 '객체'{}...
텍스트를 자유롭게 공유하거나 복사할 수 있습니다.하지만 이 문서의 URL은 참조 URL로 남겨 두십시오.
CC BY-SA 2.5, CC BY-SA 3.0 및 CC BY-SA 4.0에 따라 라이센스가 부여됩니다.
/* name setName: */
static NSString * setterfromGetter(NSString * getter){
if (getter.length <= 0) {return nil;}
// name
NSString *firstString = [[getter substringToIndex:1] uppercaseString]; // N
NSString *leaveSTring = [getter substringFromIndex:1]; // ame
return [NSString stringWithFormat:@"set%@%@:",firstString,leaveSTring];
}
/* setName name */
static NSString *getterfromSetter(NSString * setter){
if (setter.length <= 0 || ![setter hasPrefix:@"set"] || ![setter hasSuffix:@":"]) { return nil;}
//setName: ===>> Name: ====> Name ==> name
NSRange range = NSMakeRange(3, setter.length-4);
NSString *getter = [setter substringWithRange:range];
NSString *firstString = [[getter substringToIndex:1] lowercaseString]; //n
getter = [getter stringByReplacingCharactersInRange:NSMakeRange(0, 1) withString:firstString];
return getter;
}
/* */
static Class KVC_Class(id self){
return class_getSuperclass(object_getClass(self));
}
- (Class)creatClassFromSuperClass:(NSString *)superName{
Class superClass = NSClassFromString(superName);
/**
1:
2:
3:
*/
// NSKVONotifiying_ ===>>> KCKVC_
NSString *newClassName = [KVOPre stringByAppendingString:superName];
Class newClass = NSClassFromString(newClassName);
if (newClass) {
return newClass;
}
newClass = objc_allocateClassPair(superClass, newClassName.UTF8String, 0);
// Class
Method classMethod = class_getClassMethod(superClass, @selector(class));
const char *type = method_getTypeEncoding(classMethod);
/**
1:
2:
3:IMP
4:
*/
class_addMethod(newClass, @selector(class), (IMP)KVC_Class, type);
//
objc_registerClassPair(newClass);
return newClass;
}
static void KVO_Setter(id self,SEL _cmd,id newValue){
//
//_cmd ===
NSString *setterName = NSStringFromSelector(_cmd);
NSString *getterName = getterfromSetter(setterName);
id oldValue = [self valueForKey:getterName];
[self willChangeValueForKey:getterName];
//
void(*KCMsgSend)(void *,SEL,id) = (void *)objc_msgSendSuper;
struct objc_super kcSuperStruct = {
.receiver = self,
.super_class = class_getSuperclass(object_getClass(self))
};
KCMsgSend(&kcSuperStruct,_cmd,newValue);
[self didChangeValueForKey:getterName];
NSMutableArray *obserArray = objc_getAssociatedObject(self, (__bridge const void * _Nonnull)(KVOAssioKey));
for (KVOInfoModel *info in obserArray) {
dispatch_async(dispatch_queue_create(0, 0), ^{
info.blockHandle(self, info.keyPath, newValue, oldValue);
});
}
}
@end
#import "ViewController.h"
#import "People.h"
#import "NSObject+KVO.h"
@interface ViewController ()
@property (nonatomic,strong) People *people;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.people = [[People alloc] init];
[self.people addObserver:self forKeyPath:@"name" withBlock:^(id observer, NSString *keyPath, id newValue, id oldValue) {
NSLog(@"%@==%@",newValue,oldValue);
}];
[self.people addObserver:self forKeyPath:@"age" withBlock:^(id observer, NSString *keyPath, id newValue, id oldValue) {
NSLog(@"%@==%@",newValue,oldValue);
}];
self.people.name = @"hanhan";
self.people.age = @"100";
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
self.people.name = [NSString stringWithFormat:@"%@+",self.people.name];
self.people.age = [NSString stringWithFormat:@"%@+",self.people.age];
}
- (void)dealloc{
[self.people removeObserver:self forKeyPath:@"name"];
}
이 내용에 흥미가 있습니까?
현재 기사가 여러분의 문제를 해결하지 못하는 경우 AI 엔진은 머신러닝 분석(스마트 모델이 방금 만들어져 부정확한 경우가 있을 수 있음)을 통해 가장 유사한 기사를 추천합니다:
다양한 언어의 JSONJSON은 Javascript 표기법을 사용하여 데이터 구조를 레이아웃하는 데이터 형식입니다. 그러나 Javascript가 코드에서 이러한 구조를 나타낼 수 있는 유일한 언어는 아닙니다. 저는 일반적으로 '객체'{}...
텍스트를 자유롭게 공유하거나 복사할 수 있습니다.하지만 이 문서의 URL은 참조 URL로 남겨 두십시오.
CC BY-SA 2.5, CC BY-SA 3.0 및 CC BY-SA 4.0에 따라 라이센스가 부여됩니다.