//// main.m// PermissionDemo 权限访问修饰符//// Created by ZhaiKun on 2017/10/9.// Copyright © 2017年 ZhaiKun. All rights reserved.//#import <Foundation/Foundation.h>@interface Permission : NSObject{ //默认的访问权限,当前类和子类可访问 @protected int protectedPermission; //所有类都可以访问 @public int publicPermission; //只有当前类可以访问 @private int privatePermission; //框架级的访问权限,在当前framework的类中视为@protected,在当前框架以外视为@private @package int packagePermisson;}@endint main(int argc, const char * argv[]) { @autoreleasepool { // insert code here... NSLog(@"Hello, World!"); } return 0;}