iOS Log Collection

Send logs to Datadog from your iOS applications with Datadog’s dd-sdk-ios client-side logging library and leverage the following features:

• Log to Datadog in JSON format natively.
• Add context and extra custom attributes to each log sent.
• Record real client IP addresses and User-Agents.
• Optimized network usage with automatic bulk posts.

Note: The dd-sdk-ios library supports all iOS versions 11+.

Setup

1. Declare the library as a dependency depending on your package manager:

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   You can use CocoaPods to install dd-sdk-ios:

   pod 'DatadogSDK'

   To integrate using Apple’s Swift Package Manager, add the following as a dependency to your Package.swift:

   .package(url: "https://github.com/Datadog/dd-sdk-ios.git", .upToNextMajor(from: "1.0.0"))

   You can use Carthage to install dd-sdk-ios:

   github "DataDog/dd-sdk-ios"

2. Initialize the library with your application context and your Datadog client token. For security reasons, you must use a client token: you cannot use Datadog API keys to configure the dd-sdk-ios library as they would be exposed client-side in the iOS application IPA byte code. For more information about setting up a client token, see the client token documentation:

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   Datadog.initialize(
       appContext: .init(),
       configuration: Datadog.Configuration
           .builderUsing(clientToken: "<client_token>", environment: "<environment_name>")
           .build()
   )

   Datadog.initialize(
       appContext: .init(),
       configuration: Datadog.Configuration
           .builderUsing(clientToken: "<client_token>", environment: "<environment_name>")
           .set(logsEndpoint: .eu)
           .build()
   )

   When writing your application, you can enable development logs. All internal messages in the library with a priority equal to or higher than the provided level are then logged to console logs.

   Datadog.verbosityLevel = .debug

3. Configure the iOS Logger:

   logger = Logger.builder
       .set(serviceName: "app-name")
       .printLogsToConsole(true, usingFormat: .shortWith(prefix: "[iOS App] "))
       .build()

4. Send a custom log entry directly to Datadog with one of the following methods:

   logger.debug("A debug message.")
   logger.info("Some relevant information?")
   logger.notice("Have you noticed?")
   logger.warn("An important warning…")
   logger.error("An error was met!")
   logger.critical("Something critical happened!")

5. (Optional) - Provide a map of attributes alongside your log message to add attributes to the emitted log. Each entry of the map is added as an attribute.

   logger.info("Clicked OK", attributes: ["context": "onboarding flow"])

Advanced logging

Initialization

The following methods in Logger.Builder can be used when initializing the logger to send logs to Datadog:

Global configuration

Find below methods to add/remove tags and attributes to all logs sent by a given logger.

Global Tags

Add Tags

Use the addTag(withKey:value:) method to add tags to all logs sent by a specific logger:

// This adds a tag "build_configuration:debug"
logger.addTag(withKey: "build_configuration", value: "debug")

Note: <TAG_VALUE> must be a String.

Remove Tags

Use the removeTag(withKey:) method to remove tags from all logs sent by a specific logger:

// This removes any tag starting with "build_configuration"
logger.removeTag(withKey: "build_configuration")

Learn more about Datadog tags.

Global Attributes

Add attributes

By default, the following attributes are added to all logs sent by a logger:

• http.useragent and its extracted device and OS properties
• network.client.ip and its extracted geographical properties (country, city)
• logger.version, Datadog SDK version
• logger.thread_name, (main, background)
• version, client’s app version extracted from Info.plist
• environment, the environment name used to initialize the SDK

Use the addAttribute(forKey:value:) method to add a custom attribute to all logs sent by a specific logger:

// This adds an attribute "device-model" with a string value
logger.addAttribute(forKey: "device-model", value: UIDevice.current.model)

Note: <ATTRIBUTE_VALUE> can be anything conforming to Encodable (String, Date, custom Codable data model, …).

Remove attributes

Use the removeAttribute(forKey:) method to remove a custom attribute from all logs sent by a specific logger:

// This removes the attribute "device-model" from all further log send.
logger.removeAttribute("device-model")

Further Reading

Additional helpful documentation, links, and articles:

dd-sdk-ios Source codeGITHUB Learn how to explore your logsDOCUMENTATION