Question

有许多用obj C编写的例子，但我正在寻找一个Swift解决方案。到目前为止，我能找到的只有https://github.com/awslabs/aws-sdk-ios-samples/tree/master/S3TransferManager-Sample/Swift，但对我来说并不是那么清楚。

我已经在aws网页上配置了s3，我还创建并填充了文件Constans.swift：

import AWSS3
import Foundation

let CognitoRegionType = AWSRegionType.XXXXX  
let DefaultServiceRegionType = AWSRegionType.XXXXX 
let CognitoIdentityPoolId = "MyCognitoIdentityPoolId"
let S3BucketName = "MyS3BucketName"

我还在AppDelegate.swift添加了以下几行：

let credentialsProvider = AWSCognitoCredentialsProvider(regionType: CognitoRegionType, identityPoolId: CognitoIdentityPoolId)
let configuration = AWSServiceConfiguration(region: DefaultServiceRegionType, credentialsProvider: credentialsProvider)
AWSServiceManager.defaultServiceManager().defaultServiceConfiguration = configuration

我还在Swift中有一个带有按钮和图像视图控制器的课程，到目前为止，当我点击按钮时，我可以从图库或相机中拍摄照片，并在图像视图中显示。这是我的代码负责：

@IBOutlet weak var imageView: UIImageView!

@IBAction func captureImage(sender: AnyObject) {

    let imageFromSource = UIImagePickerController()
    imageFromSource.delegate = self
    imageFromSource.allowsEditing = false

    if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera){

        imageFromSource.sourceType = UIImagePickerControllerSourceType.Camera

    }
    else{

        imageFromSource.sourceType = UIImagePickerControllerSourceType.PhotoLibrary

    }

    self.presentViewController(imageFromSource, animated: true, completion: nil)

}

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {

    imageView.image = image
    self.dismissViewControllerAnimated(true, completion: {})

}

现在我想要的是添加一个新按钮，负责将这张照片上传到我的s3存储桶，就像本教程中的内容一样：https://www.youtube.com/watch?v=WZ54fH8AFUk（不幸的是，这是客观的，我会非常感激如果你可以帮我快速版......）。谢谢！

==== EDIT

我一直在关注@the_pantless_coder发布的教程（这个https://www.codementor.io/tips/5748713276/how-to-upload-images-to-aws-s3-in-swift），我决定修改现有方法imagePickerController，到目前为止看起来像这样：

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {

        imageView.image = image
        self.dismissViewControllerAnimated(true, completion: {})

        let credentialsProvider = AWSCognitoCredentialsProvider(regionType:CognitoRegionType,
            identityPoolId:CognitoIdentityPoolId)
        let configuration = AWSServiceConfiguration(region:CognitoRegionType, credentialsProvider:credentialsProvider)
        AWSServiceManager.defaultServiceManager().defaultServiceConfiguration = configuration

        let ext = "png"
        let imageURL = NSBundle.mainBundle().URLForResource("image", withExtension: ext)!

        let uploadRequest = AWSS3TransferManagerUploadRequest()
        uploadRequest.body = imageURL
        uploadRequest.key = NSProcessInfo.processInfo().globallyUniqueString + "." + ext
        uploadRequest.bucket = S3BucketName
        uploadRequest.contentType = "image/" + ext
    }

但我对这一行有疑问：

let imageURL = NSBundle.mainBundle().URLForResource("image", withExtension: ext)!

当我在这里只有imageView.image = image时，如何获得imageURL？

Answer 1

请确保您有一个桥接标头，您可以在其中导入相应的AWS标头。在GitHub上有一个位于here的示例。

这样做应该使S3方法可用。

-Rohan

Answer 2

根据@ the-pantless-coder的输入，您可以将图像保存到临时文件中，并在上传完成后删除文件。

尝试：

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {

        let path = NSTemporaryDirectory().stringByAppendingString("image.jpeg")

        if let data = UIImageJPEGRepresentation(image, 0.8) {
            data.writeToFile(path, atomically: true)

        }

        self.dismissViewControllerAnimated(true, completion: {})

        let credentialsProvider = AWSCognitoCredentialsProvider(regionType:CognitoRegionType,
            identityPoolId:CognitoIdentityPoolId)
        let configuration = AWSServiceConfiguration(region:CognitoRegionType, credentialsProvider:credentialsProvider)
        AWSServiceManager.defaultServiceManager().defaultServiceConfiguration = configuration

        let ext = "jpeg"

        let uploadRequest = AWSS3TransferManagerUploadRequest()
        uploadRequest.body = path
        uploadRequest.key = NSProcessInfo.processInfo().globallyUniqueString + "." + ext
        uploadRequest.bucket = S3BucketName
        uploadRequest.contentType = "image/" + ext
    }

如何将我的ios应用程序中的图像上传到存储在aws s3上的存储桶并在Swift中完成所有这些操作？

2 个答案: