# MulticastDelegate

**Repository Path**: b9swift/MulticastDelegate

## Basic Information

- **Project Name**: MulticastDelegate
- **Description**: 令自己满意的一个 MulticastDelegate 实现
- **Primary Language**: Swift
- **License**: MIT
- **Default Branch**: master
- **Homepage**: https://github.com/b9swift/MulticastDelegate
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-08-13
- **Last Updated**: 2022-12-13

## Categories & Tags

**Categories**: Uncategorized

**Tags**: Swift, spm, swift-package, delegate

## README

# B9MulticastDelegate

[![Swift Version](https://img.shields.io/badge/Swift-5.3+-EE5533.svg?style=flat-square)](https://swift.org)
[![Swift Package Manager](https://img.shields.io/badge/spm-compatible-EE5533.svg?style=flat-square)](https://swift.org/package-manager)
[![Build Status](https://img.shields.io/github/workflow/status/b9swift/MulticastDelegate/Swift?style=flat-square&colorA=333333&colorB=EE5533)](https://github.com/b9swift/MulticastDelegate/actions)
[![gitee 镜像](https://img.shields.io/badge/%E9%95%9C%E5%83%8F-gitee-C61E22.svg?style=flat-square)](https://gitee.com/b9swift/MulticastDelegate)
[![GitHub Source](https://img.shields.io/badge/Source-GitHub-24292F.svg?style=flat-square)](https://github.com/b9swift/MulticastDelegate)

Multicast delegate is a delegate that can have more than one element in its invocation list.

## Installation

Use Swift Package Manager or import manually.

你也可以使用 [gitee 镜像](https://gitee.com/b9swift/MulticastDelegate)。

## Features

- NSHashTable free. It brings better performance and support for Linux.
- MulticastDelegate confirms `Sequence`, which means that lots of sequence features are available.
- Thread safe.
- Other delightful details, eg: error handling optimization, debug log optimization.

## Background

> I'm a big fan of the multicast delegate. I have "invented" and used it since 2014.
>
> As Swift’s ABI is stabilized, it's time to move a Swift implementation.
>
> But I cannot find a satisfied implementation everywhere. So I write one.

## Alternatives

- [jonasman/MulticastDelegate](https://github.com/jonasman/MulticastDelegate) - Use NSHashTable. Operator overloading is not a good idea, in my opinion. It is not intuitive and reduces readability. API does not meet design guidelines (Omit needless words).
- [elano50/MulticastDelegateKit](https://github.com/elano50/MulticastDelegateKit) - Use NSHashTable.
- [Kevin Lundberg's](https://www.klundberg.com/blog/notifying-many-delegates-at-once-with-multicast-delegates/) - Generic type should not be `AnyObject`. API does not meet design guidelines (Omit needless words).
- [Greg Read's](http://www.gregread.com/2016/02/23/multicast-delegates-in-swift/) - Missing duplicate check when adding. API does not meet design guidelines (Omit needless words). I dislike removing when invoking.
- [Ivan's](https://medium.com/@ivan_m/multicast-on-swift-3-and-mvvm-c-ff74ce802bcc) - Missing duplicate check when adding. It is odd to use an equatable weak wrapper to check duplicates.