aws-sdk-ios: An Objective-C repository from dongyuan

#AWS Mobile SDK for iOS

##Setting Up

To get started with the AWS SDK for iOS, you can set up the SDK and start building a new project, or you integrate the SDK in an existing project. You can also run the samples to get a sense of how the SDK works.

To use the AWS SDK for iOS, you will need the following installed on your development machine:

Xcode 7 or later
iOS 8 or later

At the AWS GitHub repo, you can check out the SDK source code.

For more information, see AWS Mobile SDK for iOS Developer Guide.

##Include the SDK for iOS in an Existing Application

The samples included with the SDK for iOS are standalone projects that are already set up for you. You can also integrate the SDK for iOS with your own existing project. There are three ways to import the AWS Mobile SDK for iOS into your project:

You should use one of these three ways to import the AWS Mobile SDK but not multiple. Importing the SDK in multiple ways loads duplicate copies of the SDK into the project and causes compiler errors.

###CocoaPods

The AWS Mobile SDK for iOS is available through CocoaPods. If you have not installed CocoaPods, install CocoaPods by running the command:
```
 $ gem install cocoapods
 $ pod setup
```
Depending on your system settings, you may have to use sudo for installing cocoapods as follows:
```
 $ sudo gem install cocoapods
 $ pod setup
```

In your project directory (the directory where your *.xcodeproj file is), create a plain text file named Podfile (without any file extension) and add the lines below. Replace YourTarget with your actual target name.

 source 'https://github.com/CocoaPods/Specs.git'
 
 platform :ios, '8.0'
 use_frameworks!
 
 target :'YourTarget' do
     pod 'AWSAutoScaling'
     pod 'AWSCloudWatch'
     pod 'AWSCognito'
     pod 'AWSCognitoIdentityProvider'
     pod 'AWSDynamoDB'
     pod 'AWSEC2'
     pod 'AWSElasticLoadBalancing'
     pod 'AWSIoT'
     pod 'AWSKinesis'
     pod 'AWSLambda'
     pod 'AWSMachineLearning'
     pod 'AWSMobileAnalytics'
     pod 'AWSS3'
     pod 'AWSSES'
     pod 'AWSSimpleDB'
     pod 'AWSSNS'
     pod 'AWSSQS'
 end

Then run the following command:
```
 $ pod install
```
Open up *.xcworkspace with Xcode and start using the SDK.

Note: Do NOT use *.xcodeproj. If you open up a project file instead of a workspace, you receive an error:
```
 ld: library not found for -lPods-AWSCore
 clang: error: linker command failed with exit code 1 (use -v to see invocation)
```

###Carthage

Install the latest version of Carthage.
Add the following to your Cartfile:
```
 github "aws/aws-sdk-ios"
```
Then run the following command:
```
 $ carthage update
```
With your project open in Xcode, select your Target. Under General tab, find Embedded Binaries and then click the + button.
Click the Add Other... button, navigate to the AWS<#ServiceName#>.framework files under Carthage > Build > iOS and select them. Do not check the Destination: Copy items if needed checkbox when prompted.
- AWSCore.framework
- AWSAutoScaling.framework
- AWSCloudWatch.framework
- AWSCognito.framework
- AWSCognitoIdentityProvider.framework
- AWSDynamoDB.framework
- AWSEC2.framework
- AWSElasticLoadBalancing.framework
- AWSIoT.framework
- AWSKinesis.framework
- AWSLambda.framework
- AWSMachineLearning.framework
- AWSMobileAnalytics.framework
- AWSS3.framework
- AWSSES.framework
- AWSSimpleDB.framework
- AWSSNS.framework
- AWSSQS.framework

Under the Build Phases tab in your Target, click the + button on the top left and then select New Run Script Phase. Then setup the build phase as follows. Make sure this phase is below the Embed Frameworks phase.

 Shell /bin/sh
 
 bash "${BUILT_PRODUCTS_DIR}/${FRAMEWORKS_FOLDER_PATH}/AWSCore.framework/strip-frameworks.sh"
 
 Show environment variables in build log: Checked
 Run script only when installing: Not checked
 
 Input Files: Empty
 Output Files: Empty

###Frameworks

Download the SDK from our AWS Mobile SDK page. The SDK is stored in a compressed file archive named aws-ios-sdk-#.#.# (where #.#.# represents the version number, so for version 2.4.0, the filename is aws-ios-sdk-2.4.0).
With your project open in Xcode, select your Target. Under General tab, find Embedded Binaries and then click the + button.
Click the Add Other... button, navigate to the AWS<#ServiceName#>.framework files and select them. Check the Destination: Copy items if needed checkbox when prompted.
- AWSCore.framework
- AWSAutoScaling.framework
- AWSCloudWatch.framework
- AWSCognito.framework
- AWSCognitoIdentityProvider.framework
- AWSDynamoDB.framework
- AWSEC2.framework
- AWSElasticLoadBalancing.framework
- AWSIoT.framework
- AWSKinesis.framework
- AWSLambda.framework
- AWSMachineLearning.framework
- AWSMobileAnalytics.framework
- AWSS3.framework
- AWSSES.framework
- AWSSimpleDB.framework
- AWSSNS.framework
- AWSSQS.framework

Under the Buid Phases tab in your Target, click the + button on the top left and then select New Run Script Phase. Then setup the build phase as follows. Make sure this phase is below the Embed Frameworks phase.

 Shell /bin/sh
 
 bash "${BUILT_PRODUCTS_DIR}/${FRAMEWORKS_FOLDER_PATH}/AWSCore.framework/strip-frameworks.sh"
 
 Show environment variables in build log: Checked
 Run script only when installing: Not checked
 
 Input Files: Empty
 Output Files: Empty

##Update the SDK to a Newer Version

When we release a new version of the SDK, you can pick up the changes as described below.

###CocoaPods

Run the following command in your project directory. CocoaPods automatically picks up the new changes.
```
 $ pod update
```
Note: If your pod is having an issue, you can delete Podfile.lock and Pods/ then run pod install to cleanly install the SDK.

###Carthage

Run the following command in your project directory. Carthage automatically picks up the new changes.
```
 $ carthage update
```

###Frameworks

In Xcode select the following frameworks in Project Navigator and hit delete on your keyboard. Then select Move to Trash:
- AWSCore.framework
- AWSAutoScaling.framework
- AWSCloudWatch.framework
- AWSCognito.framework
- AWSCognitoIdentityProvider.framework
- AWSDynamoDB.framework
- AWSEC2.framework
- AWSElasticLoadBalancing.framework
- AWSIoT.framework
- AWSKinesis.framework
- AWSLambda.framework
- AWSMachineLearning.framework
- AWSMobileAnalytics.framework
- AWSS3.framework
- AWSSES.framework
- AWSSimpleDB.framework
- AWSSNS.framework
- AWSSQS.framework
Follow the installation process above to include the new version of the SDK.

##Preparing your apps for iOS 9 The release of iOS 9 includes changes that might impact how your apps interact with some AWS services. If you compile your apps with Apple’s iOS 9 SDK (or Xcode 7), Apple’s App Transport Security (ATS) feature may affect the ability of apps to connect to certain AWS service endpoints. In order to ensure affected apps continue to successfully connect to AWS endpoints, you’ll need to configure them to interact properly with Apple’s ATS by adding these properties to your Info.plist file:

    <key>NSAppTransportSecurity</key>
    <dict>
	        <key>NSExceptionDomains</key>
	        <dict>
    	    <key>amazonaws.com</key>
    	    <dict>
                    <key>NSThirdPartyExceptionMinimumTLSVersion</key>
                    <string>TLSv1.0</string>
                    <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
                    <false/>
                    <key>NSIncludesSubdomains</key>
                    <true/>
    	    </dict>
    	    <key>amazonaws.com.cn</key>
    	    <dict>
                    <key>NSThirdPartyExceptionMinimumTLSVersion</key>
                    <string>TLSv1.0</string>
                    <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
                    <false/>
                    <key>NSIncludesSubdomains</key>
                    <true/>
    	    </dict>
	        </dict>
    </dict>

For more information, see Preparing Your Apps for iOS 9.

##Getting Started with Swift

Import the AWSCore header in the application delegate.
```
 import AWSCore
```

Create a default service configuration by adding the following code snippet in the application:didFinishLaunchingWithOptions: application delegate method.

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

In Swift file you want to use the SDK, import the appropriate headers for the services you are using. The header file import convention is import AWSServiceName, as in the following examples:
```
 import AWSS3
 import AWSDynamoDB
 import AWSSQS
 import AWSSNS
 import AWSCognito
```

Make a call to the AWS services.

 let dynamoDB = AWSDynamoDB.defaultDynamoDB()
 let listTableInput = AWSDynamoDBListTablesInput()
 dynamoDB.listTables(listTableInput).continueWithBlock{ (task: AWSTask?) -> AnyObject? in
     if let error = task.error {
         print("Error occurred: \(error)")
         return nil
     }

     let listTablesOutput = task.result as AWSDynamoDBListTablesOutput

     for tableName in listTablesOutput.tableNames {
         print("\(tableName)")
     }

     return nil
 }

Note: Most of the service client classes have a singleton method to get a default client. The naming convention is + defaultSERVICENAME (e.g. + defaultDynamoDB in the above code snippet). This singleton method creates a service client with defaultServiceConfiguration, which you set up in step 5, and maintains a strong reference to the client.

##Getting Started with Objective-C

Import the AWSCore header in the application delegate.
```
 @import AWSCore;
```

Create a default service configuration by adding the following code snippet in the application:didFinishLaunchingWithOptions: application delegate method.

 AWSCognitoCredentialsProvider *credentialsProvider = [[AWSCognitoCredentialsProvider alloc] initWithRegionType:CognitoRegionType
                                                                                                 identityPoolId:CognitoIdentityPoolId];
 AWSServiceConfiguration *configuration = [[AWSServiceConfiguration alloc] initWithRegion:DefaultServiceRegionType
                                                                      credentialsProvider:credentialsProvider];
 AWSServiceManager.defaultServiceManager.defaultServiceConfiguration = configuration;

Import the appropriate headers for the services you are using. The header file import convention is @import AWSServiceName;, as in the following examples:
```
 @import AWSS3;
 @import AWSDynamoDB;
 @import AWSSQS;
 @import AWSSNS;
 @import AWSCognito;
```

Make a call to the AWS services.

 AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];
 AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
 uploadRequest.bucket = yourBucket;
 uploadRequest.key = yourKey;
 uploadRequest.body = yourDataURL;
 uploadRequest.contentLength = [NSNumber numberWithUnsignedLongLong:fileSize];

 [[transferManager upload:uploadRequest] continueWithBlock:^id(AWSTask *task) {
 	// Do something with the response
     return nil;
 }];

Note: Most of the service client classes have a singleton method to get a default client. The naming convention is + defaultSERVICENAME (e.g. + defaultS3TransferManager in the above code snippet). This singleton method creates a service client with defaultServiceConfiguration, which you set up in step 5, and maintains a strong reference to the client.

##AWSTask

With native AWSTask support in the SDK for iOS, you can chain async requests instead of nesting them. It makes the logic cleaner, while keeping the code more readable. Read Working with AWSTask to learn how to use AWSTask.

##Logging

Changing log levels during development may make debugging easier. You can change the log level by importing AWSCore.h and calling:

Swift

AWSLogger.defaultLogger().logLevel = .Verbose

The following logging level options are available:

.None
.Error
.Warn
.Info
.Debug (This is the default.)
.Verbose

Objective-C

[AWSLogger defaultLogger].logLevel = AWSLogLevelVerbose;

The following logging level options are available:

AWSLogLevelNone
AWSLogLevelError
AWSLogLevelWarn
AWSLogLevelInfo
AWSLogLevelDebug (This is the default.)
AWSLogLevelVerbose

We recommend setting the log level to None before publishing to the Apple App Store.

##Sample Apps

The AWS SDK for iOS includes sample apps that demonstrate common use cases.

###Cognito Your User Pools Sample (Objective-C)

This sample demonstrates how sign up and sign in a user to display an authenticated portion of your app.

###Cognito Sync Sample (Swift, Objective-C)

This sample demonstrates how to securely manage and sync your mobile app data and create unique identities via login providers including Facebook, Google, and Login with Amazon.