手把手教你编写Swift脚本——一条命令完成AppIcon更换需求
source link: https://zackzheng.info/2021/07/14/swift-script-for-change-app-icon/
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Swift
是世界上最好的语言!
提倡培养自动化思维处理日常工作,提高效率,时间和精力聚焦到更关键的点上。
对于具有重复性或周期性的工作可以思考使用各种自动化方式去解决,如替换App
Icon
的工作。
目前实现的功能是:
- 生成
AppIcon.appiconset
文件夹和Contents.json
文件 - 生成所有需要的尺寸素材
- 提交
commit
执行reduceAppIconAndPush.swift
文件,带上素材的相对路径
swift reduceAppIconAndPush.swift ../../icon-1024.png
因为会提交
commit
,所以本地最好不要有未提交的commit
,不然会一并被push
上远端
commit
只会包含Contents.json
文件和素材文件,对本地其他未暂存的文件没有影响;已暂存的内容会一并被提交
脚本具体实现
抽出自动化流程为
- 创建
AppIcon.appiconset
文件夹 - 创建
Contents.json
文件 - 向
Contents.json
文件写入素材的组织结构 - 批量压缩成对应的素材
- 提交改动
commit
相比使用Shell
或者Python
,使用Swift
命令行模式实现,更易于编写和方便团队其他人维护。
struct AppIconImageItem: Codable {
let size: String
let idiom: String
let filename: String
let scale: String
}
struct AppIconInfo: Codable {
let version: Int
let author: String
}
struct AppIcon: Codable {
var images: [AppIconImageItem]
let info: AppIconInfo
}
创建AppIcon.appiconset
文件夹
func createAppIconSetFile(filePath: String, appIcon: AppIcon) -> Bool {
let fileManager = FileManager.default
do {
if fileManager.fileExists(atPath: filePath) {
try fileManager.removeItem(atPath: filePath)
}
try fileManager.createDirectory(atPath: filePath, withIntermediateDirectories: true, attributes: nil)
print("\(filePath) 文件夹创建成功")
return true
}catch {
print("【失败】\(filePath) 文件夹创建失败")
print(error.localizedDescription)
return false
}
}
创建Contents.json
文件的素材组织结构
func createAppIconModel() -> AppIcon {
let images: [AppIconImageItem] = [
AppIconImageItem(size: "20x20", idiom: "iphone", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "20x20", idiom: "iphone", filename: "[email protected]", scale: "3x"),
AppIconImageItem(size: "29x29", idiom: "iphone", filename: "icon-29.png", scale: "1x"),
AppIconImageItem(size: "29x29", idiom: "iphone", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "29x29", idiom: "iphone", filename: "[email protected]", scale: "3x"),
AppIconImageItem(size: "40x40", idiom: "iphone", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "40x40", idiom: "iphone", filename: "[email protected]", scale: "3x"),
AppIconImageItem(size: "60x60", idiom: "iphone", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "60x60", idiom: "iphone", filename: "[email protected]", scale: "3x"),
AppIconImageItem(size: "20x20", idiom: "ipad", filename: "icon-20-ipad.png", scale: "1x"),
AppIconImageItem(size: "20x20", idiom: "ipad", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "29x29", idiom: "ipad", filename: "icon-29-ipad.png", scale: "1x"),
AppIconImageItem(size: "29x29", idiom: "ipad", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "40x40", idiom: "ipad", filename: "icon-40.png", scale: "1x"),
AppIconImageItem(size: "40x40", idiom: "ipad", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "76x76", idiom: "ipad", filename: "icon-76.png", scale: "1x"),
AppIconImageItem(size: "76x76", idiom: "ipad", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "83.5x83.5", idiom: "ipad", filename: "[email protected]", scale: "2x"),
AppIconImageItem(size: "1024x1024", idiom: "ios-marketing", filename: "icon-1024.png", scale: "1x"),
]
let info = AppIconInfo(version: 1, author: "zhengzuanzhe")
let appIcon = AppIcon(images: images, info: info)
return appIcon
}
创建Contents.json
文件并写入素材组织结构
func createContentsJsonFile(filePath: String, appIcon: AppIcon) -> Bool {
let encoder = JSONEncoder()
do {
encoder.outputFormatting = .prettyPrinted
let appIconData = try encoder.encode(appIcon)
if let appIconStr = String(data: appIconData, encoding: .utf8) {
let contentJsonUrl = URL(fileURLWithPath: filePath)
try appIconStr.write(to: contentJsonUrl, atomically: true, encoding: .utf8)
print("\(filePath) 文件创建成功")
return true
} else {
print("【失败】\(filePath) 文件创建失败")
return false
}
} catch {
print(error.localizedDescription)
return false
}
}
读取素材文件
func cgImageWithPath(_ path: String) -> CGImage? {
let url = URL(fileURLWithPath: path)
guard let data = try? Data(contentsOf: url), let dataProvider = CGDataProvider(data: data as CFData), let image = CGImage(pngDataProviderSource: dataProvider, decode: nil, shouldInterpolate: true, intent: .defaultIntent) else {
return nil
}
return image
}
批量压缩成对应的素材
func createImage(size: CGSize, scale: CGFloat, image: CGImage, filename: String) {
let width = Int(size.width * scale)
let height = Int(size.height * scale)
let bitsPerComponent = image.bitsPerComponent
let bytesPerRow = image.bytesPerRow
let colorSpace = image.colorSpace
if let context = CGContext(data: nil,
width: width,
height: height,
bitsPerComponent: bitsPerComponent,
bytesPerRow: bytesPerRow,
space: colorSpace!,
bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue) {
context.interpolationQuality = .high
context.draw(image, in: CGRect(origin: .zero, size: CGSize(width: width, height: height)))
if let inputImage = context.makeImage() {
let outputImagePath = "\(filename)"
let outputUrl = URL(fileURLWithPath: outputImagePath) as CFURL
let destination = CGImageDestinationCreateWithURL(outputUrl, kUTTypePNG, 1, nil)
if let destination = destination {
CGImageDestinationAddImage(destination, inputImage, nil)
if CGImageDestinationFinalize(destination) {
print("图片 \(filename) 生成成功")
}else {
print("【失败】图片 \(filename) 生成失败")
}
}
}else {
print("【失败】图片 \(filename) 生成失败")
}
}
}
使用Shell
提交commit
@discardableResult
func execute(path: String, arguments: [String]? = nil) -> Int {
let process = Process()
process.launchPath = path
if arguments != nil {
process.arguments = arguments!
}
process.launch()
process.waitUntilExit()
return Int(process.terminationStatus)
}
execute(path: "/usr/bin/git", arguments: ["add", "\(contentJsonPath)"])
appIcon.images.forEach({ imageItem in
let filename = "\(appIconSetFilePath)/\(imageItem.filename)"
execute(path: "/usr/bin/git", arguments: ["add", "\(filename)"])
})
execute(path: "/usr/bin/git", arguments: ["commit", "-m", "chore: 替换AppIcon"])
execute(path: "/usr/bin/git", arguments: ["push", "origin"])
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