aws-ios-upload-file-to-s3.md

iOS upload files to AWS S3

1. In info.plist, add AWS keys

   	<key>AWS</key>
    <dict>
    	<key>CredentialsProvider</key>
    	<dict>
    		<key>CognitoIdentity</key>
    		<dict>
    			<key>Default</key>
    			<dict>
    				<key>PoolId</key>
    				<string>poolId</string>
    				<key>Region</key>
    				<string>US_WEST_2</string>
    			</dict>
    		</dict>
    	</dict>
    	<key>S3TransferUtility</key>
    	<dict>
    		<key>Default</key>
    		<dict>
    			<key>Region</key>
    			<string>US_WEST_2</string>
    		</dict>
    	</dict>
    </dict>
   

2. Add configuration code in AppDelegate

       let credentialsProvider = AWSCognitoCredentialsProvider(regionType:.USWest2,identityPoolId: "poolId")
        let configuration = AWSServiceConfiguration(region:.USWest2, credentialsProvider:credentialsProvider)
        
        AWSServiceManager.default().defaultServiceConfiguration = configuration

3. Upload the file

   func uploadCSV(with data: Data) {
        let expression = AWSS3TransferUtilityUploadExpression()
        expression.progressBlock = progressBlock
        
        DispatchQueue.main.async(execute: {
            self.progressView.progress = 0
        })
        
        transferUtility.uploadData(
            data,
            bucket: "bucketName",
            key: "fileName",
            contentType: "text/csv",
            expression: expression,
            completionHandler: completionHandler).continueWith { (task) -> AnyObject? in
                if let error = task.error {
                    print("Error: \(error.localizedDescription)")
                }
                
                if let _ = task.result {
                    print("Upload Starting!")
                }
                return nil;
        }
   }