Runtime方法的使用—Object篇
2016-05-04 11:41
471 查看
本篇主要是Object相关的方法调用
完整代码在这里
完整代码在这里
#pragma mark - IBAction - (IBAction)logRunTimeAction:(id)sender { objc_property_attribute_t attrs[] = { { "T", "@\"NSString\"" }, { "&", "N" }, { "V", "" } }; size_t objSize = class_getInstanceSize([_person class]); size_t allocSize = 2 * objSize; uintptr_t ptr = (uintptr_t)calloc(allocSize, 1); // Object [self object_getInstanceVariable:_person name:"_name" outValue:nil]; [self object_getClassName:_person]; [self object_getClass:_person]; [self objc_getClass:"Person"]; [self objc_getMetaClass:"Person"]; [self objc_getProtocol:"RuntimeBaseProtocol"]; [self object_copy:_person size:class_getInstanceSize([_person class])]; // [self objc_copyProtocolList];//打印大量数据 // [self objc_copyClassList];// 打印大量信息 [self object_setInstanceVariable:_person name:"_name" value:@"newName"]; [self object_setIvar:_person ivar:object_getInstanceVariable(_person, "_name", nil) value:@"NEWNAME"]; [self objc_setAssociatedObject:_person key:"_title" value:@"dev" policy:OBJC_ASSOCIATION_RETAIN]; [self object_dispose:nil]; [self objc_constructInstance:[_person class] bytes:(void *)ptr]; [self objc_destructInstance:nil]; Class class = [self objc_allocateClassPair:[_person class] name:"student" size:0]; [self objc_registerClassPair:class]; [self objc_disposeClassPair:class]; Protocol *protocol = [self objc_allocateProtocol:"NewProtocol"]; [self objc_registerProtocol:protocol]; [self class_addProtocol:[_person class] protocol:NSProtocolFromString(@"NewProtocol")]; [self class_copyProtocolList:[_person class]]; } #pragma mark - Class 创建 - (void)class_createInstance:(Class)class extraBytes:(size_t)extraBytes { Person *tempPerson = class_createInstance(class, extraBytes); tempPerson.name = @"instance creat Success"; NSLog(@"%s%@",__func__,tempPerson.name); } #pragma mark - Class 类名,父类,元类;实例变量,成员变量;属性;实例方法,类方法,方法实现; /** * 获取类的类名 * * @param class 类 */ - (void)class_getClassName:(Class)class { NSLog(@"%s:%s",__func__,class_getName(class)); } /** * 获取类的父类 * * @param class 类 */ - (void)class_getSuperClass:(Class)class { NSLog(@"%s%@",__func__,NSStringFromClass(class_getSuperclass(class))); } /** * 获取实例大小 * * @param class 类 */ - (void)class_getInstanceSize:(Class)class { NSLog(@"%s%zu",__func__,class_getInstanceSize(class)); } /** * 获取类中指定名称实例成员变量的信息 * * @param class 类 * @param name 成员变量名 */ - (void)class_getInstanceVariable:(Class)class name:(const char *)name { Ivar ivar = class_getInstanceVariable(class,name); NSLog(@"%s%s%s",__func__,[self ivar_getTypeEncoding:ivar],[self ivar_getName:ivar]); } /** * 获取类成员变量的信息(该函数没有作用,官方解释:http://lists.apple.com/archives/objc-language/2008/Feb/msg00021.html * * @param class 类 * @param name 成员变量名 */ - (void)class_getClassVariable:(Class)class name:(const char *)name { Ivar ivar = class_getClassVariable(class,name); NSLog(@"%s%s%s",__func__,[self ivar_getTypeEncoding:ivar],[self ivar_getName:ivar]); } /** * 获取属性的信息(与获取成员变量信息类似,不同的是不用打_) * * @param class 类 * @param name 属性名 */ - (void)class_getProperty:(Class)class name:(const char *)name { objc_property_t property = class_getProperty(class,name); NSLog(@"%s%s%s",__func__,[self property_getName:property] ,[self property_getAttributes:property]); [self property_copyAttributeList:property]; } /** * 获取类制定方法的信息 * * @param class 类 * @param selector 方法 */ - (Method)class_getInstanceMethod:(Class)class selector:(SEL)selector { Method method = class_getInstanceMethod(class, selector); NSLog(@"%s%s%u",__func__,sel_getName(method_getName(method)) ,[self method_getNumberOfArguments:method]); return method; } /** * 获取类方法的信息 * * @param class 类 * @param selector 方法 */ + (Method)class_getClassMethod:(Class)class selector:(SEL)selector { Method method = class_getClassMethod(class, selector); NSLog(@"%s%s%u",__func__,sel_getName(method_getName(method)) ,method_getNumberOfArguments(method)); return method; } /** * 获取方法具体实现 * * @param class 类 * @param selector 方法 * * @return IMP */ - (IMP)class_getMethodImplementation:(Class)class selector:(SEL)selector { IMP imp = class_getMethodImplementation(class, selector); return imp; } /** * 获取类中的方法的实现,该方法的返回值类型为struct * * @param class 类 * @param selector 方法 * * @return IMP */ - (IMP)class_getMethodImplementation_stret:(Class)class selector:(SEL)selector { IMP imp = class_getMethodImplementation_stret(class, selector); return imp; } #pragma mark - Class 成员变量列表;属性列表;方法列表;协议列表; /** * 获取成员变量列表 * * @param class 类 */ - (void)class_copyIvarList:(Class)class { unsigned int count; Ivar *ivarList = class_copyIvarList(class, &count); NSLog(@"%s",__func__); for (int i = 0; i < count; i++) { Ivar ivar = ivarList[i]; // 获取成员属性名 NSString *name = [NSString stringWithUTF8String:[self ivar_getName:ivar]]; NSString *type = [NSString stringWithUTF8String:[self ivar_getTypeEncoding:ivar]]; // NSString *value = object_getIvar(obj, ivar); NSLog(@"%@%@",type,name); } } - (void)class_copyPropertyList:(Class)class { unsigned int count; objc_property_t *propertyList = class_copyPropertyList(class,&count); NSLog(@"%s",__func__); for (int i = 0; i < count; i++) { objc_property_t property = propertyList[i]; // 获取成员属性名 NSString *name = [NSString stringWithUTF8String:[self property_getName:property]]; NSString *type = [NSString stringWithUTF8String:[self property_getAttributes:property]]; NSLog(@"%@%@",type,name); } } /** * 获取方法列表 * * @param class 类 */ - (void)class_copyMethodList:(Class)class { unsigned int count; Method *methodList = class_copyMethodList(class,&count); for (int i = 0; i < count; i++) { Method method = methodList[i]; NSLog(@"%s%s",__func__,sel_getName(method_getName(method))); } } /** * 获取协议列表 * * @param class 类 */ - (void)class_copyProtocolList:(Class)class { unsigned int count; Protocol **protocolList = class_copyProtocolList(class,&count); for (int i = 0; i < count; i++) { Protocol *protocol = protocolList[i]; NSLog(@"%s%s",__func__,[self protocol_getName:protocol]); } } #pragma mark - Class add: 成员变量;属性;方法;协议 /** * 添加成员变量(添加成员变量只能在运行时创建的类,且不能为元类) * * @param class 类 * @param name 成员变量名字 * @param size 大小 * @param alignment 对其方式 * @param types 参数类型 */ - (void)class_addIvar:(Class)class name:(const char *)name size:(size_t)size alignment:(uint8_t)alignment types:(const char *)types { // if (class_addIvar([_person class], "country", sizeof(NSString *), 0, "@")) { if (class_addIvar(class, name, size, alignment, types)) { NSLog(@"%sadd ivar success",__func__); }else{ NSLog(@"%sadd ivar fail",__func__); } } /** * 添加属性 * * @param class 类 * @param name 属性名 * @param attributes 参数 * @param attributeCount 参数数量 */ - (void)class_addProperty:(Class)class name:(const char *)name attributes:(const objc_property_attribute_t *)attributes attributeCount:(unsigned int)attributeCount { objc_property_attribute_t type = { "T", "@\"NSString\"" }; objc_property_attribute_t ownership = { "&", "N" }; // C = copy objc_property_attribute_t backingivar = { "V", "" }; objc_property_attribute_t attrs[] = { type, ownership, backingivar }; if (class_addProperty(class, name, attrs, attributeCount)) { NSLog(@"%sadd Property success",__func__); }else{ NSLog(@"%sadd Property fail",__func__); } // [self class_copyPropertyList:class]; } /** * 添加方法 * * @param class 类 * @param selector 方法 * @param imp 方法实现 * @param types 类型 */ - (void)class_addMethod:(Class)class selector:(SEL)selector imp:(IMP)imp types:(const char *)types { if (class_addMethod(class,selector,class_getMethodImplementation(class, selector),types)) { NSLog(@"%sadd method success",__func__); }else{ NSLog(@"%sadd method fail",__func__); } // [self class_copyMethodList:class]; } /** * 添加协议 * * @param class 类 * @param protocol 协议 */ - (void)class_addProtocol:(Class)class protocol:(Protocol *)protocol { if (class_addProtocol(class, protocol)) { NSLog(@"%sadd protocol success",__func__); }else{ NSLog(@"%sadd protocol fail",__func__); } // [self class_copyProtocolList:class]; } #pragma marl - Class replace:属性;方法 /** * 替换属性的信息(如果没有原属性会新建一个属性) * * @param class 类 * @param name 属性名 * @param attributes 类型 * @param attributeCount 类型数量 */ - (void)class_replaceProperty:(Class)class name:(const char *)name attributes:(const objc_property_attribute_t *)attributes attributeCount:(unsigned int)attributeCount { objc_property_attribute_t type = { "T", "@\"NSString\"" }; objc_property_attribute_t ownership = { "C", "" }; // C = copy objc_property_attribute_t backingivar = { "V", "" }; objc_property_attribute_t attrs[] = { type, ownership, backingivar }; class_replaceProperty(class, name, attrs, 3); // [self class_copyPropertyList:class]; } /** * 替代方法的实现 * * @param class 类 * @param selector 被替代的方法 * @param imp 替代方法 * @param types 类型 */ - (void)class_replaceMethod:(Class)class selector:(SEL)selector imp:(IMP)imp types:(const char *)types { class_replaceMethod(class, selector, imp, types); NSLog(@"%s",__func__); [_person runtimeTestAction1]; } #pragma mark - Class 判断 /** * 查看类是否相应指定方法 * * @param class 类 * @param selector 方法 */ - (void)class_respondsToSelector:(Class)class selector:(SEL)selector { if (class_respondsToSelector(class,selector)) { NSLog(@"%s %@ exist",__func__,NSStringFromClass(class)); }else{ NSLog(@"%s %@ non-exist",__func__,NSStringFromClass(class)); } } /** * 查看类是否为元类 * * @param class 类 */ - (void)class_isMetaClass:(Class)class { if (class_isMetaClass(class)) { NSLog(@"%s %@ isMetaClass",__func__,NSStringFromClass(class)); }else{ NSLog(@"%s %@ non-isMetaClass",__func__,NSStringFromClass(class)); } } /** * 查看类是否遵循指定协议 * * @param class 类 * @param protocol 协议 */ - (BOOL)class_conformsToProtocol:(Class)class protocol:(Protocol *)protocol { if (class_conformsToProtocol(class, protocol)) { NSLog(@"%s %@ conformsToProtocol %@",__func__,NSStringFromClass(class),NSStringFromProtocol(protocol)); return YES; }else{ NSLog(@"%s %@ non-conformsToProtocol %@",__func__,NSStringFromClass(class),NSStringFromProtocol(protocol)); return NO; } } #pragma mark - Objc get: 实例变量;成员变量;类名;类;元类;关联对象;协议;协议列表 /** * 获取实例的成员变量 * * @param obj 对象 * @param name 成员变量名 * @param outValue 输出值 */ - (void)object_getInstanceVariable:(id)obj name:(const char*)name outValue:(void **)outValue{ Ivar ivar = object_getInstanceVariable(obj, name, nil); NSLog(@"%s personName %@",__func__,[self object_getIvar:obj ivar:ivar]); } /** * 获取成员变量的值 * * @param obj 对象 * @param ivar 成员变量 * * @return 值 */ - (id)object_getIvar:(id)obj ivar:(Ivar)ivar { return object_getIvar(obj, ivar); } /** * 获取指定对象的类名 * * @param obj 对象 */ - (void)object_getClassName:(id)obj { NSLog(@"%s%s",__func__,object_getClassName(obj)); } /** * 获取指定对象的类 * * @param obj 对象 */ - (void)object_getClass:(id)obj { NSLog(@"%s%@",__func__,NSStringFromClass(object_getClass(obj))); } /** * 拷贝指定对象 * * @param obj 对象 * @param size 实例大小 */ - (void)object_copy:(id)obj size:(size_t)size { Person *tempObj = object_copy(obj, size); tempObj.name = @"tempxietao"; NSLog(@"%s tempPersonName:%@ personName:%@",__func__,tempObj.name,_person.name); } /** * 获取指定类名的类 * * @param name 类名 */ - (void)objc_getClass:(const char *)name { NSLog(@"%s%@",__func__,NSStringFromClass(objc_getClass(name))); } /** * 获取指定类的元类 * * @param name 类名 */ - (void)objc_getMetaClass:(const char *)name { NSLog(@"%s%@",__func__,NSStringFromClass(objc_getMetaClass(name))); } /** * 获取指定名字的协议 * * @param name 协议名称 */ - (void)objc_getProtocol:(const char *)name { Protocol *protocol = objc_getProtocol("RuntimeBaseProtocol"); NSLog(@"%s %s",__func__,[self protocol_getName:protocol]); // [self class_conformsToProtocol:[_person class] protocol:protocol]; } /** * 获取关联对象的值 * * @param obj 关联对象 * @param key 关联Key */ - (void)objc_getAssociatedObject:(id)obj key:(const void *)key { id object = objc_getAssociatedObject(obj,key); NSLog(@"%s %s %s %@",__func__,object_getClassName(obj),key,object); } /** * 获取所有已注册类信息 */ - (void)objc_copyClassList{ unsigned int count = 0; Class *classes = objc_copyClassList(&count); for (unsigned int i = 0; i < count; i++) { Class class = classes[i]; NSLog(@"%s%s",__func__,class_getName(class)); } } /** * 获取运行时所知道的所有协议的数组(打印大量数据) */ - (void)objc_copyProtocolList { unsigned int count = 0; Protocol **protocolList = objc_copyProtocolList(&count); for (int i = 0; i < count; i++) { Protocol *protocol = protocolList[i]; NSLog(@"%s%s",__func__,[self protocol_getName:protocol]); } } #pragma mark - Objc set: 实例变量;成员变量;协议 /** * 设置指定实例指定名称的成员变量的值 * * @param obj 对象 * @param name 成员变量名 * @param value 值 */ - (void)object_setInstanceVariable:(id)obj name:(const char *)name value:(void *)value { Ivar ivar = object_setInstanceVariable(obj,name,value); NSLog(@"%s %s %@",__func__,[self ivar_getName:ivar],object_getIvar(obj, ivar)); } /** * 设置指定对象的指定的成员变量的值 * * @param obj 对象 * @param ivar 成员变量 * @param value 值 */ - (void)object_setIvar:(id)obj ivar:(Ivar)ivar value:(void *)value { object_setIvar(obj,ivar,value); NSLog(@"%s %s %@ ",__func__,[self ivar_getName:ivar],object_getIvar(obj, ivar)); } /** * 设置关联对象的值 * * @param obj 对象 * @param key 关联Key * @param value 值 * @param policy 对象引用方式 */ - (void)objc_setAssociatedObject:(id)obj key:(const void*)key value:(id)value policy:(objc_AssociationPolicy)policy{ objc_setAssociatedObject(obj, key, value, policy); [self objc_getAssociatedObject:obj key:key]; } #pragma mark - Objc 动态创建/销毁类、对象、协议 - (void)object_dispose:(id)objc { Person *tempPerson = [[Person alloc] init]; tempPerson.name = @"tempName"; object_dispose(tempPerson); // 释放后 无法取得name的值 NSLog(@"%s release result %@",__func__,tempPerson.name); } /** * 在指定位置创建类实例 * * @param class 类名 * @param bytes 位置 */ - (void)objc_constructInstance:(Class)class bytes:(void *)bytes { Person *obj = objc_constructInstance(class,bytes); obj.name = @"objc_constructInstance_name"; NSLog(@"%s %@",__func__,obj.name); } /** * 销毁类实例 * * @param obj 销毁对象 */ - (void)objc_destructInstance:(id)obj { Person *tempPerson = [[Person alloc] init]; tempPerson.name = @"tempName"; // 释放后 无法取得name的值 objc_destructInstance(tempPerson); NSLog(@"%s destruct result %@",__func__,tempPerson.name); } /** * 创建一个新类和元类 * * @param superclass 父类 * @param name 类名 * @param size 额外大小 一般给0就好了 */ - (Class)objc_allocateClassPair:(Class)superclass name:(const char*)name size:(size_t)size { Class newClass = objc_allocateClassPair(superclass,name,size); NSLog(@"%s creat new class named %@",__func__,NSStringFromClass(newClass)); return newClass; } /** * 销毁一个类及其相关联的类 * * @param class 类名 */ - (void)objc_disposeClassPair:(Class)class { objc_disposeClassPair(class); NSLog(@"%s disposs class named %@",__func__,NSStringFromClass(class)); } /** * 在应用中注册由objc_allocateClassPair创建的类 * * @param class 类名 */ - (void)objc_registerClassPair:(Class)class { objc_registerClassPair(class); NSLog(@"%s register class named %@",__func__,NSStringFromClass(class)); } /** * 创建新的协议实例 * * @param name 协议名称 * * @return 协议实例 */ - (Protocol *)objc_allocateProtocol:(const char *)name { // 检查该协议是否已经注册 if (![self class_conformsToProtocol:SelfClass protocol:NSProtocolFromString([NSString stringWithUTF8String:name])]) { Protocol *protocol = objc_allocateProtocol(name); NSLog(@"%s creat protocol named %@",__func__,NSProtocolFromString([NSString stringWithUTF8String:name])); return protocol; } return nil; } /** * 在运行时中注册新创建的协议 * * @param protocol 协议 */ - (void)objc_registerProtocol:(Protocol *)protocol { // 检查该协议是否已经注册 if (protocol) { objc_registerProtocol(protocol); NSLog(@"%s register protocol named %s",__func__,[self protocol_getName:protocol]); } } /** * 移除该对象所有关联的的对象 * * @param object 对象 */ - (void)objc_removeAssociatedObjects:(id)object { objc_removeAssociatedObjects(object); }
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