Swift Package Manager(SPM)是蘋(píng)果最新的官方工具,可以用來(lái)管理 Swift 代碼的分配，它為 Swift 編譯系統(tǒng)集成了自動(dòng)進(jìn)行下載、編譯和連接依賴的過(guò)程。
在此之前我們常用的工具是Cocoapods和Carthage。

支持的平臺(tái)

? macOS
? Linux
? iOS
? watchOS
? tvOS

測(cè)試環(huán)境

系統(tǒng)版本

10.11.5 Beta

Swift版本

Xcode7.3.1(swift 2.2)
Xcode8 beta(swift 3)

檢查當(dāng)前Swift版本是否支持SPM

當(dāng)前默認(rèn)為Xcode7.3.1,查看swift版本
swift -version

Apple Swift version 2.2 (swiftlang-703.0.18.8 clang-703.0.31)
Target: x86_64-apple-macosx10.9

swift2.2不支持SPM
swift build

error: unable to invoke subcommand: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-build (No such file or directory)

切換到Xcode8
sudo xcode-select -s /Applications/Xcode-beta.app

查看當(dāng)前swift版本
swift -version

Apple Swift version 3.0 (swiftlang-800.0.30 clang-800.0.24)
Target: x86_64-apple-macosx10.9

Swift3支持SPM
swift build

error:: no Package.swift found

這個(gè)error是因?yàn)槲覀冞€沒(méi)有創(chuàng)建SPM的庫(kù)

創(chuàng)建SPM測(cè)試庫(kù)

初始化

在github創(chuàng)建SPMTest測(cè)試庫(kù)

https://github.com/huhuegg/SPMTest.git

clone SPMTest

cd /Users/admin/Swift/SwiftPackageManagerExample/
git clone https://github.com/huhuegg/SPMTest.git

初始化SPMTest library

cd /Users/admin/Swift/SwiftPackageManagerExample/SPMTest
swift package init --type library

Creating library package: SPMTest
Creating Package.swift
Creating .gitignore
Creating Sources/
Creating Sources/SPMTest.swift
Creating Tests/
Creating Tests/LinuxMain.swift
Creating Tests/SPMTest/
Creating Tests/SPMTest/SPMTestTests.swift

修改SPMTest

編輯Package.swift

import PackageDescription

let package = Package(
    name: "SPMTest"
)

//創(chuàng)建動(dòng)態(tài)鏈接庫(kù)
//let dynamicLibSPMTest = Product(name: "SPMTest", type: .Library(.Dynamic), modules: "SPMTest")
//products.append(dynamicLibSPMTest)
//創(chuàng)建靜態(tài)庫(kù)
//let staticLibExecTest = Product(name: "SPMTest", type: .Library(.Static), modules: "SPMTest")
//products.append(staticLibExecTest)

編輯SPMTest.swift

必須包含init方法，否則使用時(shí)會(huì)遇到 initializer is inaccessible due to 'internal' protection level

public class SPMPublicTest {
    public var text = "SPMPublicTest"
    public init(text:String) {
        self.text = text
    }
}

提交并標(biāo)注SPMTest版本

提交編輯后的SPMTest

git commit * -m "init library, add tag 1.0.0"
git push

添加版本號(hào)Tag

此處需要注意: commit && push的時(shí)候local tag默認(rèn)不會(huì)被提交

git tag 1.0.0
git push origin --tags

創(chuàng)建測(cè)試工程

mkdir /Users/admin/Swift/SwiftPackageManagerExample/ExecExampleTest
cd /Users/admin/Swift/SwiftPackageManagerExample/ExecExampleTest
swift package init --type executable

Creating executable package: SwiftPackageManagerExample
Creating Package.swift
Creating .gitignore
Creating Sources/
Creating Sources/main.swift
Creating Tests/

將SPMTest庫(kù)導(dǎo)入工程

在Package.swift的dependencies添加SPMTest，并指定版本為1.0.0

import PackageDescription

let package = Package(
    name: "ExecExampleTest",
    dependencies: [
        .Package(url:"https://github.com/huhuegg/SPMTest.git", majorVersion: 1),
      ]
)

添加測(cè)試代碼

不要在main.swift直接導(dǎo)入SPMTest

創(chuàng)建Test.swift
vi Sources/Test.swift

import SPMTest

class Test {
    
    class func testFunc() {
        let spm = SPMPublicTest(text: "SPMTest::SPMPublicTest")        
        print("testFunc: \(spm.text)")
    }
    
}

修改main.swift

print("## Swift Package Manager Example  ##")
Test.testFunc()

編譯

創(chuàng)建測(cè)試工程的時(shí)候使用的類型是executable，所以最后會(huì)生成可執(zhí)行文件
swift build

Cloning https://github.com/huhuegg/SPMTest.git
HEAD is now at 629d483 public
Resolved version: 1.0.0
Compile Swift Module 'SPMTest' (1 sources)
Compile Swift Module 'ExecExampleTest' (2 sources)
Linking .build/debug/ExecExampleTest

如果SPMTest庫(kù)的tag沒(méi)有被提交,在build時(shí)會(huì)遇到錯(cuò)誤
error: No version tag found in (/Users/admin/Swift/example/Packages/SPMTest) package. Add a version tag with "git tag" command. Example: "git tag 0.1.0"

測(cè)試

.build/debug/ExecExampleTest

Swift Package Manager Example

testFunc: SPMTest::SPMPublicTest

回到Xcode

之前所有的操作都沒(méi)有打開(kāi)Xcode編輯器，讓我們回到最熟悉的Xcode吧！

創(chuàng)建Xcode工程

swift package generate-xcodeproj

generated: ./ExecExampleTest.xcodeproj

芝麻開(kāi)門(mén)
open ./ExecExampleTest.xcodeproj

spm.png

調(diào)試運(yùn)行時(shí)記得選My Mac， 強(qiáng)烈期待iOS iOS iOS～