package tutorial

Get desktop application:
View/edit binary Protocol Buffers messages

AddressBook 类

• repeated Person people = 1

Person 类，消息结构

Used in: AddressBook

• string name = 1

• int32 id = 2

  这里的required 的修饰符表示候name必须赋值(没有默认值)

• string email = 3

  optional 也就是可不赋值, proto3中已移除该关键字 当然optional string email = 3;[default = 0]默认值是0 required和optional可以有默认值

• repeated Person.PhoneNumber phones = 4

  repeated 表示词字段可以出现多次

结构体、类，统一定义为 message实际上是嵌套类

Used in: Person

• string number = 1

• PhoneType type = 2

枚举定义

Used in: PhoneNumber

• MOBILE = 0

• HOME = 1

• WORK = 2