Swift中图片资源使用流程的优化方法详解

// iOS
let closeImage = UIImage(named: "close")
// macOS
let closeImage = NSImage(named: NSImage.Name("close"))

# Assets.xcassets文件夹路径
assetsFolder="${SRCROOT}/${PROJECT_NAME}/Assets.xcassets"
# 生成的swift文件路径（根据个人习惯修改）
utilsFile="${SRCROOT}/${PROJECT_NAME}/Source/Utils/AssetsUtils.swift"
touch $utilsFile
# 兼容iOS和macOS的处理
echo -e "#if os(OSX)\n typealias Image  = NSImage\n typealias ImageName = NSImage.Name\n#elseif os(iOS)\n import UIKit\n\n typealias Image  = UIImage\n typealias ImageName = String\n#endif" > "${utilsFile}"
# 使用extension来扩展Image
echo -e "\nextension Image {" >> "${utilsFile}"

# 遍历资源文件夹，将每个资源拼接成静态变量输出到swift文件中
for folder in `ls $assetsFolder`
do
if [[ $folder =~ ".imageset" ]]
then
 asset=${folder/.imageset/}
 echo " static var assets_${asset}: Image? { return Image(named: ImageName(\"${asset}\")) }" >> "${utilsFile}"
fi
done
# 完成输出
echo "}" >> "${utilsFile}"

#if os(OSX)
 typealias Image  = NSImage
 typealias ImageName = NSImage.Name
#elseif os(iOS)
 import UIKit
 typealias Image  = UIImage
 typealias ImageName = String
#endif
extension Image {
 static var assets_close: Image? { return Image(named: ImageName("close")) }
}

// iOS
let closeImage = Image.assets_close
// macOS
let closeImage = Image.assets_close