marco
98b7600797
对标安卓正式版、对接 app-server(8770)的 SwiftUI 客户端。iOS 无障碍受限、无比价核心,做自成一体:美团 CPS 导购 + 福利(签到/任务/金币)+ 查看(比价记录/省钱战绩)。 功能完整 M0-M5:脚手架、短信登录(JWT+Keychain+401 自动刷新)、首页券 feed 导购、比价记录+省钱战绩、福利、我的(资料/反馈/设置/注销)。 单 target、0 三方依赖、XcodeGen 生成工程;Debug/Release 双 plist 分流 ATS。 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
22 lines
1.1 KiB
Swift
22 lines
1.1 KiB
Swift
import UIKit
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import ImageIO
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/// 图片降采样 + JPEG 压缩(头像/反馈截图上传前)。用 ImageIO 流式缩略,避免大图整张解进内存。
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enum ImageDownsampler {
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static func jpeg(_ data: Data, maxDimension: CGFloat = 1024, quality: CGFloat = 0.8) -> Data? {
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let srcOpts: [CFString: Any] = [kCGImageSourceShouldCache: false]
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guard let src = CGImageSourceCreateWithData(data as CFData, srcOpts as CFDictionary) else {
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return UIImage(data: data)?.jpegData(compressionQuality: quality)
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}
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let thumbOpts: [CFString: Any] = [
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kCGImageSourceCreateThumbnailFromImageAlways: true,
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kCGImageSourceCreateThumbnailWithTransform: true, // 按 EXIF 自动旋转
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kCGImageSourceThumbnailMaxPixelSize: maxDimension,
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]
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guard let cg = CGImageSourceCreateThumbnailAtIndex(src, 0, thumbOpts as CFDictionary) else {
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return UIImage(data: data)?.jpegData(compressionQuality: quality)
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}
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return UIImage(cgImage: cg).jpegData(compressionQuality: quality)
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}
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}
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