Github上的README页面(https://github.com/aws/aws-sdk-ios-v2)已经有一个示例，可以从文件路径URL上传图像:
AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
uploadRequest.bucket = yourBucket;
uploadRequest.key = yourKey;
uploadRequest.body = yourDataURL; // <<<< this is a NSURL
uploadRequest.contentLength = [NSNumber numberWithUnsignedLongLong:fileSize];
但是如果我只有一个存储在内存中的UIImage（没有文件路径），那该怎么办呢？
是否可以使用SDK上传UIImage（或其NSData）到S3？
手动使用HTTP API（例如AFNetworking）会更容易吗？
尽管AWSiOSSDKv2不支持从内存中上传图像，但您可以将其保存为文件，然后再上传。
//image you want to upload
UIImage* imageToUpload = [UIImage imageNamed:@"imagetoupload"];
//convert uiimage to
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", dateKey]];
[UIImagePNGRepresentation(imageToUpload) writeToFile:filePath atomically:YES];
NSURL* fileUrl = [NSURL fileURLWithPath:filePath];
//upload the image
AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
uploadRequest.body = fileUrl;
uploadRequest.bucket = AWS_BUCKET_NAME;
uploadRequest.key = @"yourkey";
uploadRequest.contentType = @"image/png";
[[transferManager upload:thumbNailUploadRequest] continueWithExecutor:[BFExecutor mainThreadExecutor] withBlock:^id(BFTask *task) {
if(task.error == nil) {
NSLog(@"woot");
}
return nil;
}];
[NSURL fileURLWithPath:filePath]！ - SoftDesigner[[NSFileManager defaultManager] removeItemAtPath:filePath error:&error];删除了文件。 - Lukas看起来AWSiOSSDKv2目前不支持从内存上传图片 :(
来自Github的问题：
只接受NSURL文件的决定是基于以下几个原因：
- 自版本1以来，暂停/恢复功能需要输入为文件。当应用程序被终止时，无法恢复NSData并重试传输。
- iOS 7及以上版本上的后台传输仅支持文件。目前，我们不支持后台传输，但我们计划在未来支持它。我们考虑接受NSData，并将数据内部保存到临时目录中。
- 我们决定不在2.0版本中包含此功能，因为如果NSData由文件支持，它会使数据的磁盘使用量加倍。此外，开发人员在使用S3TransferManager时必须处理与磁盘相关的错误。即使我们决定不在2.0版本中接受NSData，我们仍然期待您的反馈。如果这是您希望在将来版本中看到的功能，请创建一个新问题，请求该功能。
```
- (void)uploadImageToS3: (UIImage *)image {
NSData *imageData = UIImageJPEGRepresentation(image, 0.7);
AWSS3GetPreSignedURLRequest *getPreSignedURLRequest = [AWSS3GetPreSignedURLRequest new];
getPreSignedURLRequest.bucket = @"bucket-name";
getPreSignedURLRequest.key = @"image-name.jpg";
getPreSignedURLRequest.HTTPMethod = AWSHTTPMethodPUT;
getPreSignedURLRequest.expires = [NSDate dateWithTimeIntervalSinceNow:3600];
NSString *fileContentTypeString = @"text/plain";
getPreSignedURLRequest.contentType = fileContentTypeString;
[[[AWSS3PreSignedURLBuilder defaultS3PreSignedURLBuilder] getPreSignedURL:getPreSignedURLRequest] continueWithBlock:^id(AWSTask *task) {
if (task.error) {
NSLog(@"Error: %@", task.error);
} else {
NSURL *presignedURL = task.result;
NSLog(@"upload presignedURL is \n%@", presignedURL);
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:presignedURL];
request.cachePolicy = NSURLRequestReloadIgnoringLocalCacheData;
[request setHTTPMethod:@"PUT"];
[request setValue:fileContentTypeString forHTTPHeaderField:@"Content-Type"];
NSURLSessionUploadTask *uploadTask = [[NSURLSession sharedSession] uploadTaskWithRequest:request fromData:imageData completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(@"Upload errer: %@", error);
}
NSLog(@"Done");
}];
[uploadTask resume];
}
return nil;
}];
}
AWSS3TransferUtility，然后它会为您完成所有操作。详细信息请参见此处。func uploadData() {
let data: Data = Data() // Data to be uploaded
let expression = AWSS3TransferUtilityUploadExpression()
expression.progressBlock = {(task, progress) in
DispatchQueue.main.async(execute: {
// Do something e.g. Update a progress bar.
})
}
var completionHandler: AWSS3TransferUtilityUploadCompletionHandlerBlock?
completionHandler = { (task, error) -> Void in
DispatchQueue.main.async(execute: {
// Do something e.g. Alert a user for transfer completion.
// On failed uploads, `error` contains the error object.
})
}
let transferUtility = AWSS3TransferUtility.default()
transferUtility.uploadData(data,
bucket: "YourBucket",
key: "YourFileName",
contentType: "text/plain",
expression: expression,
completionHandler: completionHandler).continueWith {
(task) -> AnyObject! in
if let error = task.error {
print("Error: \(error.localizedDescription)")
}
if let _ = task.result {
// Do something with uploadTask.
}
return nil;
}
}
导入正确的文件（在此处下载：此处）
#import <AWSCore/AWSCore.h>
#import <AWSS3TransferManager.h>
.m
- (void)viewDidLoad {
[super viewDidLoad];
AWSCognitoCredentialsProvider *credentialsProvider = [[AWSCognitoCredentialsProvider alloc] initWithRegionType:AWSRegionUSEast1
identityPoolId:@"us-east-1:*******-******-*****-*****-*****"];
AWSServiceConfiguration *configuration = [[AWSServiceConfiguration alloc] initWithRegion:AWSRegionUSEast1
credentialsProvider:credentialsProvider];
AWSServiceManager.defaultServiceManager.defaultServiceConfiguration = configuration;
}
- (void)upload{
//convert uiimage to
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@".png"]];
[UIImagePNGRepresentation(YOUR_UIIMAGE) writeToFile:filePath atomically:YES];
NSURL* fileUrl = [NSURL fileURLWithPath:filePath];
//upload the image
AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
uploadRequest.body = fileUrl;
uploadRequest.bucket = @"YOUR_BUCKET_NAME";
uploadRequest.key = @"YOUR_FOLDER_NAME (if you have one)/NEW_IMAGE_NAME.png";
uploadRequest.contentType = @"image/png";
uploadRequest.ACL = AWSS3BucketCannedACLPublicRead;
AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];
[[transferManager upload:uploadRequest] continueWithExecutor:[AWSExecutor mainThreadExecutor]
withBlock:^id(AWSTask *task) {
if (task.error != nil) {
NSLog(@"%s %@","Error uploading :", uploadRequest.key);
}else { NSLog(@"Upload completed"); }
return nil;
}];
}
有用的链接：
嗨，你可以在iPhone上使用Amazon iOS v2，无需将图像保存到临时文件夹中即可发送图像。
在这段代码中，logFile.body是NSData类型。
这段代码会帮助你的朋友。
AWSS3PutObjectRequest *logFile = [AWSS3PutObjectRequest new];
logFile.bucket = uploadTokenData_.bucket;
logFile.key = key;
logFile.contentType = contentType;
logFile.body = data_;
logFile.contentLength = [NSNumber numberWithInteger:[data_ length]];
AWSS3 *S3 = [[AWSS3 alloc] initWithConfiguration:[AWSCredentialsProvider runServiceWithStsCredential]];
AWSS3TransferManager *transferManager = [[AWSS3TransferManager alloc] initWithS3:S3];
[[transferManager.s3 putObject:logFile] continueWithBlock:^id(BFTask *task)
{
NSLog(@"Error : %@", task.error);
if (task.error == nil)
{
NSLog(@"Uploadet");
}
}
使用AWSS3TransferUtility，您可以上传任何数据类型，现在AWSS3TransferManagerUploadRequest已经过时，这里是上传jpeg的代码示例，但可以转换为任何数据类型：