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ID
        credential.secretKey = "xxx" // 密钥secret
        let 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 region
        endpoint.useHTTPS = true
        config.endpoint = endpoint
        config.signatureProvider = self
        QCloudCOSXMLService.registerDefaultCOSXML(with: config)
        QCloudCOSTransferMangerService.registerDefaultCOSTransferManger(
            with: config)
    }
}

把appdelegate加入到swiftui的app中。

struct DemoApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var delegate
    
    var 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 QCloudCOSXML

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ID
        credential.secretKey = "xxx" // 密钥secret
        let 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 region
        endpoint.useHTTPS = true
        config.endpoint = endpoint
        config.signatureProvider = self
        QCloudCOSXMLService.registerDefaultCOSXML(with: config)
        QCloudCOSTransferMangerService.registerDefaultCOSTransferManger(
            with: config)
    }
}

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

上传部分

简单上传部分

import QCloudCOSXML

func 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 id
    put.object = picPath // 上传路径
    put.body = img.pngData() as AnyObject
    put.setFinish { res, err in
        print("upload obj finish \(res) \(err)")
    }
    QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put)
}

到此cos接入完毕。