关于runtime的一些方法

最近看了一些runtime的使用方法，之前一直静不下心来看，记录一下方便以后查看

通过字符串获取方法

 SEL selector = NSSelectorFromString(@"getMethod");

两个方法的替换

BOOL result = class_replaceMethod([self class], @selector(method0), (IMP)method1, NULL);

方法的交换

method0方法的触发交换到method1接收

    SEL originalSelector = NSSelectorFromString(@"method0");
    SEL swizzledSelector = NSSelectorFromString(@"method1");
    Method originalMethod = class_getInstanceMethod([self class], originalSelector);
    Method swizzledMethod = class_getInstanceMethod([self class], swizzledSelector);
    method_exchangeImplementations(originalMethod, swizzledMethod);

为类别新增一个属性

类别新增属性需要关联当前的对象

   #pragma mark- 利用runtime为类别添加属性
-(void)setProperty1:(NSString *)property1{
    //需要关联对象
    objc_setAssociatedObject(self, "property", property1, OBJC_ASSOCIATION_COPY_NONATOMIC);
}
-(NSString *)property1{
    return objc_getAssociatedObject(self, "property");
}

获取类所有的属性

   objc_property_t *propertys = class_copyPropertyList([self class], &copyIvarListCount);
    for (NSInteger i = 0; i<copyIvarListCount; i++) {
        objc_property_t property = propertys[i];
        const char *name = property_getName(property);
        NSLog(@">>>>>>class_copyPropertyList==:%s",name);
    }
  //需要释放
    free(propertys);

获取整个类的实例方法的方法列表

   Method *methods = class_copyMethodList([self class], &copyIvarListCount);
    for (NSInteger i = 0; i<copyIvarListCount; i++) {
        Method method = methods[i];
        SEL name = method_getName(method);
        NSLog(@">>>>>>class_copyMethodList==:%@",NSStringFromSelector(name));
    }
  //需要释放
    free(methods);

获取整个成员变量列表

unsigned int copyIvarListCount = 0;
    Ivar *ivars = class_copyIvarList([self class], &copyIvarListCount);
    for (NSInteger i=0; i<copyIvarListCount; i++) {
        Ivar ivar = ivars[i];
        const char *name = ivar_getName(ivar);
        NSLog(@">>>>>>class_copyIvarList==:%s",name);
    }
    free(ivars);//需要释放

获取所有继承的协议

Protocol * __unsafe_unretained *protocals = class_copyProtocolList([self class], &copyIvarListCount);
    for (NSInteger i = 0; i<copyIvarListCount; i++) {
        Protocol *protocal = protocals[i];
        const char *name = protocol_getName(protocal);
        NSLog(@">>>>>>class_copyProtocolList==:%s",name);
    }
    free(protocals);