1、类
动态创建一个类(参数:父类,类名,额外的内存空间)Class objc_allocateClassPair(Class superclass, const char *name, size_t extraBytes)注册一个类(要在类注册之前添加成员变量)void objc_registerClassPair(Class cls) 销毁一个类void objc_disposeClassPair(Class cls)获取isa指向的ClassClass object_getClass(id obj)设置isa指向的ClassClass object_setClass(id obj, Class cls)判断一个OC对象是否为ClassBOOL object_isClass(id obj)判断一个Class是否为元类BOOL class_isMetaClass(Class cls)获取父类Class class_getSuperclass(Class cls)
2、成员变量
获取一个实例变量信息Ivar class_getInstanceVariable(Class cls, const char *name)拷贝实例变量列表(最后需要调用free释放)Ivar *class_copyIvarList(Class cls, unsigned int *outCount)设置和获取成员变量的值void object_setIvar(id obj, Ivar ivar, id value)id object_getIvar(id obj, Ivar ivar)动态添加成员变量(已经注册的类是不能动态添加成员变量的)BOOL class_addIvar(Class cls, const char * name, size_t size, uint8_t alignment, const char * types)获取成员变量的相关信息const char *ivar_getName(Ivar v)const char *ivar_getTypeEncoding(Ivar v)
3、属性
获取一个属性objc_property_t class_getProperty(Class cls, const char *name)拷贝属性列表(最后需要调用free释放)objc_property_t *class_copyPropertyList(Class cls, unsigned int *outCount)动态添加属性BOOL class_addProperty(Class cls, const char *name, const objc_property_attribute_t *attributes, unsigned int attributeCount)动态替换属性void class_replaceProperty(Class cls, const char *name, const objc_property_attribute_t *attributes, unsigned int attributeCount)获取属性的一些信息const char *property_getName(objc_property_t property)const char *property_getAttributes(objc_property_t property)
4、方法
获得一个实例方法、类方法Method class_getInstanceMethod(Class cls, SEL name)Method class_getClassMethod(Class cls, SEL name)方法实现相关操作IMP class_getMethodImplementation(Class cls, SEL name) IMP method_setImplementation(Method m, IMP imp)void method_exchangeImplementations(Method m1, Method m2) 拷贝方法列表(最后需要调用free释放)Method *class_copyMethodList(Class cls, unsigned int *outCount)动态添加方法BOOL class_addMethod(Class cls, SEL name, IMP imp, const char *types)动态替换方法IMP class_replaceMethod(Class cls, SEL name, IMP imp, const char *types)获取方法的相关信息(带有copy的需要调用free去释放)SEL method_getName(Method m)IMP method_getImplementation(Method m)const char *method_getTypeEncoding(Method m)unsigned int method_getNumberOfArguments(Method m)char *method_copyReturnType(Method m)char *method_copyArgumentType(Method m, unsigned int index)选择器相关const char *sel_getName(SEL sel)SEL sel_registerName(const char *str)用block作为方法实现IMP imp_implementationWithBlock(id block)id imp_getBlock(IMP anImp)BOOL imp_removeBlock(IMP anImp)