iOS开发 - Runtime获取类的成员变量、属性、方法、协议

注意： 在OC中，使用了Copy、Create、New类型的函数，需要释放指针（ARC是管不了C函数）

1.获取成员变量列表

unsigned int count;
    ///获取成员变量列表
    Ivar *ivarList = class_copyIvarList([self class], &count);
    for(unsigned int i = 0; i < count; i++){
        Ivar myIvar = ivarList[i];
        const char *ivarName = ivar_getName(myIvar);
        NSString *ivarNameStr = [NSString stringWithUTF8String:ivarName];
        NSLog(@"成员变量：%d-%@",i,ivarNameStr);
    }
    free(ivarList);

2.获取属性列表

unsigned int count;
///获取属性列表
    objc_property_t *propertyList = class_copyPropertyList([self class], &count);
    for(unsigned int i = 0; i < count; i++){
        const char *propertyName = property_getName(propertyList[i]);
        NSString *propertyNameStr = [NSString stringWithUTF8String:propertyName];
        NSLog(@"属性：%d-%@",i,propertyNameStr);
    }
    free(propertyList);

3.获取方法列表

unsigned int count;
///获取方法列表
    Method *methodList = class_copyMethodList([self class], &count);
    for(unsigned int i = 0; i < count; i++){
        Method method = methodList[i];
        SEL _Nonnull aSelector = method_getName(method);
        NSString *methodName = NSStringFromSelector(aSelector);
        NSLog(@"方法名称：%@",methodName);
    }
    free(methodList);

4.获取所遵循的协议列表

unsigned int count;
///获取所遵循的协议列表
    __unsafe_unretained Protocol **protocolList = class_copyProtocolList([self class], &count);
    for(unsigned int i = 0; i < count; i++){
        Protocol *myProtocol = protocolList[i];
        const char *protocolName = protocol_getName(myProtocol);
        NSString *protocolNameStr = [NSString stringWithUTF8String:protocolName];
        //NSSelectorFromString(protocolNameStr);
        NSLog(@"获取到的协议方法：%@",protocolNameStr);
    }
    free(protocolList);

5.获取某个类的私有属性的值

有一个继承自UIView类的自定义view FilterView 作用是放置筛选条件里面有一个
@property (nonatomic, strong) NSMutableArray *buttons;属性作为筛选item的UIButton的容器

现在从buttons属性中拿到放置筛选条件的UIButton数组

//获取FilterView的私有属性buttons的值
    FilterView *attrMenu = [[FilterView alloc] init];
    Ivar attrMenuBtnsIvar = class_getInstanceVariable([attrMenu class], "_buttons");
    NSArray *attrButtonsArr = object_getIvar(attrMenu, attrMenuBtnsIvar);
    NSLog(@"获取到的筛选条件button：%@", attrButtonsArr);
    free(attrMenuBtnsIvar);