swiftui接入腾讯云对象存储cos

个人来说玩玩，还是用swiftui比较好，毕竟写界面的速度快很多，而且还比较直观。
有部分逻辑需要接入图片上传，因此接入了一下腾讯云对象存储cos。
官网上只有swift的教程，没有swiftui的。记录一下swiftui的接入过程。

首先引入pod集成项目。

pod 'QCloudCOSXML' 
# 据说是精简版，不过看起来好像也没有啥效果，头文件的引入好像根据文档来还是会报错的。
# 本例子只是简单的上传，因此用哪个都行。
# pod 'QCloudCOSXML/Transfer'

引入头文件

import QCloudCOSXML
// 精简版用下边的这个好像会报错，找不到这个，用上边的没问题
// import QCloudCOSXMLTransfer

初始化

一般来说swiftui的app部分是这样的。不过按照教程直接继承协议是不行的。

@main
struct DemoApp: App {var body: some Scene {WindowGroup {ContentView()}}
}

首先新建一个 appdelegate

class AppDelegate: NSObject, UIApplicationDelegate, QCloudSignatureProvider {}

然后在里边实现初始化及签名的回调。这两部分感觉不用写在appdelegate的finish launch里边，因为现在的应用一般还要来个隐私协议。暴露出一个方法来给swiftui调用，控制流程比较方便。最好粘贴代码，不要手敲，例如 QCloudAuthentationV5Creator 这个有个虚方法QCloudAuthentationCreator，稍不注意就失败了。
另外本例子用的是客户端直接同cos通讯方式，如果出现泄漏直接换secret也是可行的。

class AppDelegate: NSObject, UIApplicationDelegate, QCloudSignatureProvider {func signature(with fileds: QCloudSignatureFields!, request: QCloudBizHTTPRequest!, urlRequest urlRequst: NSMutableURLRequest!, compelete continueBlock: QCloudHTTPAuthentationContinueBlock!) {let credential = QCloudCredential.init()credential.secretID = "xxx" // 密钥IDcredential.secretKey = "xxx" // 密钥secretlet creator = QCloudAuthentationV5Creator.init(credential: credential)let signature = creator?.signature(forData: urlRequst)continueBlock(signature, nil)}func initQCloud() {let config = QCloudServiceConfiguration.init()let endpoint = QCloudCOSXMLEndPoint.init()endpoint.regionName = "ap-beijing" // bucket regionendpoint.useHTTPS = trueconfig.endpoint = endpointconfig.signatureProvider = selfQCloudCOSXMLService.registerDefaultCOSXML(with: config)QCloudCOSTransferMangerService.registerDefaultCOSTransferManger(with: config)}
}

把appdelegate加入到swiftui的app中。

struct DemoApp: App {@UIApplicationDelegateAdaptor(AppDelegate.self) var delegatevar body: some Scene {WindowGroup {ContentView().onAppear {delegate.initQCloud()}}}
}

初始化到此完毕。
初始化完整代码：

import SwiftUI
import QCloudCOSXMLclass AppDelegate: NSObject, UIApplicationDelegate, QCloudSignatureProvider {func signature(with fileds: QCloudSignatureFields!, request: QCloudBizHTTPRequest!, urlRequest urlRequst: NSMutableURLRequest!, compelete continueBlock: QCloudHTTPAuthentationContinueBlock!) {let credential = QCloudCredential.init()credential.secretID = "xxx" // 密钥IDcredential.secretKey = "xxx" // 密钥secretlet creator = QCloudAuthentationV5Creator.init(credential: credential)let signature = creator?.signature(forData: urlRequst)continueBlock(signature, nil)}func initQCloud() {let config = QCloudServiceConfiguration.init()let endpoint = QCloudCOSXMLEndPoint.init()endpoint.regionName = "ap-beijing" // bucket regionendpoint.useHTTPS = trueconfig.endpoint = endpointconfig.signatureProvider = selfQCloudCOSXMLService.registerDefaultCOSXML(with: config)QCloudCOSTransferMangerService.registerDefaultCOSTransferManger(with: config)}
}struct DemoApp: App {@UIApplicationDelegateAdaptor(AppDelegate.self) var delegatevar body: some Scene {WindowGroup {ContentView().onAppear {delegate.initQCloud()}}}
}

上传部分

简单上传部分

import QCloudCOSXMLfunc updatePic(img: UIImage) {let picPath = "temp/\(Day(date: date).format(format: "yyyy-MM-dd"))/\(UUID().uuidString).png"let put = QCloudCOSXMLUploadObjectRequest<AnyObject>()put.bucket = "xxx" // bucket idput.object = picPath // 上传路径put.body = img.pngData() as AnyObjectput.setFinish { res, err inprint("upload obj finish \(res) \(err)")}QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put)
}