runtime备份

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NSObject

@protocol NSObject//...@property (readonly) Class superclass;- (Class)class OBJC_SWIFT_UNAVAILABLE("use 'anObject.dynamicType' instead");- (instancetype)self;- (BOOL)isKindOfClass:(Class)aClass;- (BOOL)isMemberOfClass:(Class)aClass;//...@end

@interface NSObject <NSObject> {    Class isa  OBJC_ISA_AVAILABILITY;}//...+ (BOOL)isSubclassOfClass:(Class)aClass;+ (Class)superclass;+ (Class)class OBJC_SWIFT_UNAVAILABLE("use 'aClass.self' instead");//...@end

应用

- (void)use_nsobject{    Class objectClsObj = [NSObject class];    Class animalClsObj = [FBAnimal class];    Class dogClsObj = [FBDog class];        NSLog(@"objectClsObj = %p, animalClsObj = %p, dogClsObj = %p", objectClsObj, animalClsObj, dogClsObj);    NSLog(@"NSObject superclass = %p, FBAnimal superclass = %p, FBDog superclass = %p", [NSObject superclass], [FBAnimal superclass], [FBDog superclass]);        NSLog(@"FBDog isSubclassOfClass FBDog = %d", [FBDog isSubclassOfClass:dogClsObj]);    NSLog(@"FBDog isSubclassOfClass FBAnimal = %d", [FBDog isSubclassOfClass:animalClsObj]);    NSLog(@"FBDog isSubclassOfClass NSObject = %d", [FBDog isSubclassOfClass:objectClsObj]);        FBAnimal *animal1 = [[FBAnimal alloc] init];    FBAnimal *animal2 = [[FBDog alloc] init];    FBDog* dog = [[FBDog alloc] init];        NSLog(@"animal1 object = %p, animal1 self = %p, animal1 class = %p", animal1, [animal1 self], [animal1 class]);    NSLog(@"animal2 object = %p, animal2 self = %p, animal2 class = %p", animal2, [animal2 self], [animal2 class]);    NSLog(@"dog object = %p, dog self = %p, dog class = %p", dog, [dog self], [dog class]);        NSLog(@"animal1 isKindOfClass FBAnimal = %d", [animal1 isKindOfClass: animalClsObj]);    NSLog(@"animal1 isKindOfClass FBDog = %d", [animal1 isKindOfClass: dogClsObj]);    NSLog(@"animal1 isMemberOfClass FBAnimal = %d", [animal1 isMemberOfClass: animalClsObj]);    NSLog(@"animal1 isMemberOfClass FBDog = %d", [animal1 isMemberOfClass: dogClsObj]);        NSLog(@"animal2 isKindOfClass FBAnimal = %d", [animal2 isKindOfClass: animalClsObj]);    NSLog(@"animal2 isKindOfClass FBDog = %d", [animal2 isKindOfClass: dogClsObj]);    NSLog(@"animal2 isMemberOfClass FBAnimal = %d", [animal2 isMemberOfClass: animalClsObj]);    NSLog(@"animal2 isMemberOfClass FBDog = %d", [animal2 isMemberOfClass: dogClsObj]);        NSLog(@"dog isKindOfClass FBAnimal = %d", [dog isKindOfClass: animalClsObj]);    NSLog(@"dog isKindOfClass FBDog = %d", [dog isKindOfClass: dogClsObj]);    NSLog(@"dog isMemberOfClass FBAnimal = %d", [dog isMemberOfClass: animalClsObj]);    NSLog(@"dog isMemberOfClass FBDog = %d", [dog isMemberOfClass: dogClsObj]);}

output：

objectClsObj = 0x101083170, animalClsObj = 0x100822d70, dogClsObj = 0x100822dc0NSObject superclass = 0x0, FBAnimal superclass = 0x101083170, FBDog superclass = 0x100822d70FBDog isSubclassOfClass FBDog = 1FBDog isSubclassOfClass FBAnimal = 1FBDog isSubclassOfClass NSObject = 1animal1 object = 0x7fc7e37d4af0, animal1 self = 0x7fc7e37d4af0, animal1 class = 0x100822d70animal2 object = 0x7fc7e37d68f0, animal2 self = 0x7fc7e37d68f0, animal2 class = 0x100822dc0dog object = 0x7fc7e37d6730, dog self = 0x7fc7e37d6730, dog class = 0x100822dc0animal1 isKindOfClass FBAnimal = 1animal1 isKindOfClass FBDog = 0animal1 isMemberOfClass FBAnimal = 1animal1 isMemberOfClass FBDog = 0animal2 isKindOfClass FBAnimal = 1animal2 isKindOfClass FBDog = 1animal2 isMemberOfClass FBAnimal = 0animal2 isMemberOfClass FBDog = 1dog isKindOfClass FBAnimal = 1dog isKindOfClass FBDog = 1dog isMemberOfClass FBAnimal = 0dog isMemberOfClass FBDog = 1

总结：

protocol中为instance method，是对instance object的Class isa操作
interface中class method，是对class object操作
isSubclassOfClass：本类和子类都属于subclass
isKindOfClass：本类和子类都属于kind
isMemberOFClass：本类属于Member，子类不属于member

NSObject封装

@protocol NSObject//...@property (readonly) Class superclass;- (Class)class OBJC_SWIFT_UNAVAILABLE("use 'anObject.dynamicType' instead");- (instancetype)self;- (BOOL)isKindOfClass:(Class)aClass;- (BOOL)isMemberOfClass:(Class)aClass;//...@end

@interface NSObject <NSObject> {    Class isa  OBJC_ISA_AVAILABILITY;}//...+ (BOOL)isSubclassOfClass:(Class)aClass;+ (Class)superclass;+ (Class)class OBJC_SWIFT_UNAVAILABLE("use 'aClass.self' instead");//...@end

应用

- (void)use_nsobject{    Class objectClsObj = [NSObject class];    Class animalClsObj = [FBAnimal class];    Class dogClsObj = [FBDog class];        NSLog(@"objectClsObj = %p, animalClsObj = %p, dogClsObj = %p", objectClsObj, animalClsObj, dogClsObj);    NSLog(@"NSObject superclass = %p, FBAnimal superclass = %p, FBDog superclass = %p", [NSObject superclass], [FBAnimal superclass], [FBDog superclass]);        NSLog(@"FBDog isSubclassOfClass FBDog = %d", [FBDog isSubclassOfClass:dogClsObj]);    NSLog(@"FBDog isSubclassOfClass FBAnimal = %d", [FBDog isSubclassOfClass:animalClsObj]);    NSLog(@"FBDog isSubclassOfClass NSObject = %d", [FBDog isSubclassOfClass:objectClsObj]);        FBAnimal *animal1 = [[FBAnimal alloc] init];    FBAnimal *animal2 = [[FBDog alloc] init];    FBDog* dog = [[FBDog alloc] init];        NSLog(@"animal1 object = %p, animal1 self = %p, animal1 class = %p", animal1, [animal1 self], [animal1 class]);    NSLog(@"animal2 object = %p, animal2 self = %p, animal2 class = %p", animal2, [animal2 self], [animal2 class]);    NSLog(@"dog object = %p, dog self = %p, dog class = %p", dog, [dog self], [dog class]);        NSLog(@"animal1 isKindOfClass FBAnimal = %d", [animal1 isKindOfClass: animalClsObj]);    NSLog(@"animal1 isKindOfClass FBDog = %d", [animal1 isKindOfClass: dogClsObj]);    NSLog(@"animal1 isMemberOfClass FBAnimal = %d", [animal1 isMemberOfClass: animalClsObj]);    NSLog(@"animal1 isMemberOfClass FBDog = %d", [animal1 isMemberOfClass: dogClsObj]);        NSLog(@"animal2 isKindOfClass FBAnimal = %d", [animal2 isKindOfClass: animalClsObj]);    NSLog(@"animal2 isKindOfClass FBDog = %d", [animal2 isKindOfClass: dogClsObj]);    NSLog(@"animal2 isMemberOfClass FBAnimal = %d", [animal2 isMemberOfClass: animalClsObj]);    NSLog(@"animal2 isMemberOfClass FBDog = %d", [animal2 isMemberOfClass: dogClsObj]);        NSLog(@"dog isKindOfClass FBAnimal = %d", [dog isKindOfClass: animalClsObj]);    NSLog(@"dog isKindOfClass FBDog = %d", [dog isKindOfClass: dogClsObj]);    NSLog(@"dog isMemberOfClass FBAnimal = %d", [dog isMemberOfClass: animalClsObj]);    NSLog(@"dog isMemberOfClass FBDog = %d", [dog isMemberOfClass: dogClsObj]);}

output：

objectClsObj = 0x101083170, animalClsObj = 0x100822d70, dogClsObj = 0x100822dc0NSObject superclass = 0x0, FBAnimal superclass = 0x101083170, FBDog superclass = 0x100822d70FBDog isSubclassOfClass FBDog = 1FBDog isSubclassOfClass FBAnimal = 1FBDog isSubclassOfClass NSObject = 1animal1 object = 0x7fc7e37d4af0, animal1 self = 0x7fc7e37d4af0, animal1 class = 0x100822d70animal2 object = 0x7fc7e37d68f0, animal2 self = 0x7fc7e37d68f0, animal2 class = 0x100822dc0dog object = 0x7fc7e37d6730, dog self = 0x7fc7e37d6730, dog class = 0x100822dc0animal1 isKindOfClass FBAnimal = 1animal1 isKindOfClass FBDog = 0animal1 isMemberOfClass FBAnimal = 1animal1 isMemberOfClass FBDog = 0animal2 isKindOfClass FBAnimal = 1animal2 isKindOfClass FBDog = 1animal2 isMemberOfClass FBAnimal = 0animal2 isMemberOfClass FBDog = 1dog isKindOfClass FBAnimal = 1dog isKindOfClass FBDog = 1dog isMemberOfClass FBAnimal = 0dog isMemberOfClass FBDog = 1

总结：

protocol中为instance method，是对instance object的Class isa操作
interface中class method，是对class object操作
isSubclassOfClass：本类和子类都属于subclass
isKindOfClass：本类和子类都属于kind
isMemberOFClass：本类属于Member，子类不属于member

#if !OBJC_OLD_DISPATCH_PROTOTYPESOBJC_EXPORT void method_invoke(void /* id receiver, Method m, ... */ )     __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);OBJC_EXPORT void method_invoke_stret(void /* id receiver, Method m, ... */ )     __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0)    OBJC_ARM64_UNAVAILABLE;#elseOBJC_EXPORT id method_invoke(id receiver, Method m, ...)     __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);OBJC_EXPORT void method_invoke_stret(id receiver, Method m, ...)     __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0)    OBJC_ARM64_UNAVAILABLE;#endif

#if !OBJC_OLD_DISPATCH_PROTOTYPESOBJC_EXPORT void method_invoke(void /* id receiver, Method m, ... */ )     __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);OBJC_EXPORT void method_invoke_stret(void /* id receiver, Method m, ... */ )     __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0)    OBJC_ARM64_UNAVAILABLE;#elseOBJC_EXPORT id method_invoke(id receiver, Method m, ...)     __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);OBJC_EXPORT void method_invoke_stret(id receiver, Method m, ...)     __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0)    OBJC_ARM64_UNAVAILABLE;#endif

OBJC_EXPORT BOOL class_addMethod(Class cls, SEL name, IMP imp,                                  const char *types)      __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);

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