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swift package ma

20 April 2023

Swift Package Manager 使用指南

参考： https://juejin.cn/post/6844903544017911821 https://github.com/apple/swift-package-manager/blob/main/Documentation/Usage.md https://docs.vapor.codes/zh/getting-started/spm/

几个常用的命令

swift package init --type executable（or library）  //初始化包，不带参数的话默认是Library
swift package init	//初始化包，不带参数的话默认是Library
swift build # 构建 lib
swift run # 运行 lib

使用过程

MyLib

mkdir MyLib && cd MyLib
swift package init	//初始化包，不带参数的话默认是Library
swift build    //编译并生成可执行的二进制文件
swift run 	//执行生成的文件

Packages.swift

import PackageDescription

let package = Package(
    name: "MyLib",
    products: [
        // Products define the executables and libraries a package produces, and make them visible to other packages.
        .library(
            name: "MyLib",
            targets: ["MyLib"]),
    ],
    dependencies: [
        // Dependencies declare other packages that this package depends on.
        // .package(url: /* package url */, from: "1.0.0"),
    ],
    targets: [
        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
        // Targets can depend on other targets in this package, and on products in packages this package depends on.
        .target(
            name: "MyLib",
            dependencies: []),
        .testTarget(
            name: "MyLibTests",
            dependencies: ["MyLib"]),
    ]
)

Source MyLib.swift

public struct MyLib {
    public private(set) var text = "Hello, World!"

    public var num:Int
    public init() {
        num = 2
    }
    
}

SPM依赖包必须使用git url和版本号，所以我们需要为我们的库创建一个git仓库并提交代码和打tag：

$ git init
$ git add .
$ git commit -m "Initial Commit"
$ git tag 1.0.0

生成 MyLib.xcodeproj：swift package generate-xcodeproj，以便xcode其他项目引入

MyPackage

mkdir MyPackage && cd MyPackage
swift package init //--type executable
swift build    //编译并生成可执行的二进制文件
swift run 	//执行生成的文件

//生成MyPackage.xcodeproj
swift package generate-xcodeproj

swift build --configuration release  //构建release lib

Packages.swift

import PackageDescription

let package = Package(
    name: "MyPackage",
    products:[
        // Products define the executables and libraries produced by a package, and make them visible to other packages.
        .library(
            name: "MyPackage",
            type: .static,
            targets: ["MyPackage"]),
    ],
    dependencies: [
        // Dependencies declare other packages that this package depends on.
        // .package(url: /* package url */, from: "1.0.0"),
         .package(url: "https://github.com/SwiftyJSON/SwiftyJSON.git", from: "4.0.0"),	//第三方库url和版本号
         .package(url: "../MyLib", from: "1.0.0") 
    ],
    targets: [
        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
        // Targets can depend on other targets in this package, and on products in packages this package depends on.
        .target(
            name: "MyPackage",
            dependencies: ["SwiftyJSON","MyLib"]),
        .testTarget(
            name: "MyPackageTests",
            dependencies: ["MyPackage","MyLib"]),
    ]
)

Source MyPackage.swift

import SwiftyJSON	//引入模块
import MyLib

public struct MyPackageLib {
    public private(set) var text = "Hello, MyPackageLib!"

    public var num:Int
    public init() {
        num = 3

        print(text)

        let json = JSON(["name":"Jack", "age": 25])
        print(json)

        //自定义库
        let lib = MyLib()
        print(lib)
    }
    
}

在iOS工程中使用SPM

  1. 使用xcode创建一个Example.xcworkspace
  2. 使用xcode创建一个Example.xcodeproj,并将Example.xcodeproj 与 MyPackage.xcodeproj 拖到 Example workspace当中
  3. 配置xcode项目，在Example的Target中手动添加MyPackage.framework