如何使用AWS的iOS SDK上传来自设备的图像，并设置为公开

问题描述：

由于我们似乎仅限于桶的数目，我想弄清楚如何完成以下任务：

Since it seems we are limited to the number of buckets, I'm trying to figure out how to accomplish the following:

在我有一个iOS应用程序，用户可以上传个人资料图片。
资料图片任何人都可以看到（我想它公开）。
在理想情况下，我可以上传到一个桶（例如：myprofilepics.s3.amazonaws.com）
在理想的情况下，每个用户可以上传自己的子文件夹（例如：myprofilepics.s3.amazonaws.com/images/userXXX /
在理想情况下，我上传的图片，并将其设置为公共访问直接从应用程序，以便其他用户可以立即查看个人资料图片。

我缺少的东西在文档中？我AP preciate在这个问题上的任何反馈。

Am I missing something in the documentation? I appreciate any feedback on this issue.

答

要解决这个问题，我开始与亚马逊的样品code在他们的iOS SDK中发现的此处。在SDK的压缩，感兴趣的示例项目可以在样本中找到/ S3_Uploader 。

To solve this problem, I started with Amazon's sample code in their iOS SDK, found here. In the SDK zip, the sample project of interest can be found at samples/S3_Uploader.

要从示例项目得到在其中上传的图片是公共，你只需要添加在正确的地方一条线：

To get from that sample project to one in which the uploaded image is public, you simply need to add one line in the right place:

por.cannedACL   = [S3CannedACL publicRead];

其中， POR 是 S3PutObjectRequest 用来上传的图像。

where por is the S3PutObjectRequest used to upload the image.

我的项目的code上传看起来像这样（看起来几乎相同，Amazon的样品code）：

My project's code for uploading looks like this (looks almost identical to Amazon's sample code):

NSString *uuid = @""; // Generate a UUID however you like, or use something else to name your image.
UIImage *image; // This is the UIImage you'd like to upload.

// This URL is not used in the example, but it points to the file
// to be uploaded.
NSString *url = [NSString pathWithComponents:@[ @"https://s3.amazonaws.com/", AWS_PICTURE_BUCKET, uuid ]];

// Convert the image to JPEG data. Use UIImagePNGRepresentation for pngs
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);

// Create the S3 Client.
AmazonS3Client *s3 = [[AmazonS3Client alloc] initWithAccessKey:AWS_ACCESS_KEY_ID withSecretKey:AWS_SECRET_KEY];

@try {
    // Create the picture bucket.
    [s3 createBucket:[[S3CreateBucketRequest alloc] initWithName:AWS_PICTURE_BUCKET]];

    // Upload image data.  Remember to set the content type.
    S3PutObjectRequest *por = [[S3PutObjectRequest alloc] initWithKey:uuid inBucket:AWS_PICTURE_BUCKET];
    por.contentType = @"image/jpeg"; // use "image/png" here if you are uploading a png
    por.cannedACL   = [S3CannedACL publicRead];
    por.data        = imageData;
    por.delegate    = self; // Don't need this line if you don't care about hearing a response.

    // Put the image data into the specified s3 bucket and object.
    [s3 putObject:por];
}
@catch (AmazonClientException *exception) {
    NSLog(@"exception");
}

AWS_ACCESS_KEY_ID 和 AWS_SECRET_KEY ，当然，您的AWS凭据， AWS_PICTURE_BUCKET 是你的照片桶。

AWS_ACCESS_KEY_ID and AWS_SECRET_KEY are, of course, your AWS credentials, and AWS_PICTURE_BUCKET is your picture bucket.

如何使用AWS的iOS SDK上传来自设备的图像，并设置为公开

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