iOS SDK Migration Guide

The new version of Amplitude's iOS SDK (Amplitude-Swift) features a plugin architecture, built-in type definition and broader support for front-end frameworks. The new version isn't backwards compatible with Amplitude-iOS.

To migrate to Amplitude-Swift, update your dependencies and instrumentation.

Terminology¶

Amplitude-iOS: Maintenance iOS SDK
Amplitude-Swift: New iOS SDK

Dependencies¶

CocoaPods¶

Add AmplitudeSwift dependency to Podfile.

- pod 'Amplitude', '~> 8.14'
+ pod 'AmplitudeSwift', '~> 1.0'

Swift Package Manager¶

Enter https://github.com/amplitude/Amplitude-Swift into the search bar.

- `https://github.com/amplitude/Amplitude-iOS`
+ `https://github.com/amplitude/Amplitude-Swift`

Carthage¶

Add amplitude/Amplitude-Swift to your Cartfile.

- github "amplitude/Amplitude-iOS" ~> 8.14
+ github "amplitude/Amplitude-Swift" ~> 1.0

Instrumentation¶

This SDK offers an API to instrument events. To migrate to the new SDK, you need to update a few calls. The following sections detail which calls have changed.

Initialization¶

Like all other calls, instance() has been removed. Configuration is handled differently between the maintenance iOS and new iOS SDK. The new iOS SDKs use the Configuration object to set the configuration. See Configuration.

SwiftObjective-C

- import Amplitude
+ import AmplitudeSwift

- Amplitude.instance().trackingSessionEvents = true
- Amplitude.instance().initializeApiKey("YOUR-API-KEY")
+ let amplitude = Amplitude(configuration: Configuration(
+     apiKey: "YOUR-API-KEY",
+     defaultTracking: DefaultTrackingOptions(
+         sessions: true
+     )
+ ))

- #import "Amplitude.h"
+ @import AmplitudeSwift;

- [Amplitude instance].trackingSessionEvents = true;
- [[Amplitude instance] initializeApiKey:@"YOUR-API-KEY"];
+ AMPConfiguration* configuration = [AMPConfiguration initWithApiKey:@"YOUR-API-KEY"];
+ configuration.defaultTracking.sessions = true;
+ Amplitude* amplitude = [Amplitude initWithConfiguration:configuration];

Configuration¶

The configurations for the new SDK are simpler and more consistent across runtimes.

Amplitude-iOS	Amplitude-Swift
`amplitude.instanceWithName("YOUR-INSTANCE-NAME")`	`config.instanceName`
`amplitude.useDynamicConfig`	NOT SUPPORTED.
`amplitude.setServerUrl("YOUR-SERVER-URL")`	`config.serverUrl`
`amplitude.setServerZone("AMPServerZone.EU or AMPServerZone.US")`	`config.serverZone`
`amplitude.trackingOptions`	`config.trackingOptions`
`amplitude.trackingSessionEvents`	`config.defaultTracking.sessions`
`amplitude.minTimeBetweenSessionsMillis`	`config.minTimeBetweenSessionsMillis`
`amplitude.eventUploadMaxBatchSize`	`config.flushQueueSize`
`amplitude.eventUploadThreshold`	`config.flushQueueSize`
`amplitude.eventUploadPeriodSeconds`	`config.flushIntervalMillis`
Set max retries count. NOT SUPPORTED.	`config.flushMaxRetries`
`amplitude.eventMaxCount`	NOT SUPPORTED.
`amplitude.optOut`	`config.optOut`
`amplitude.enableCoppaControl() or amplitude.disableCoppaControl()`	`config.enableCoppaControl`
Customize storage provider. NOT SUPPORTED.	`config.storageProvider`
Set up log level. NOT SUPPORTED.	`config.logLevel`
Customize logger provider. NOT SUPPORTED.	`config.loggerProvider`
`deviceId` and `userId` don't have a minimum length.	Minimum length is 5. `config.minIdLength` overwrites the minimum length of`deviceId` and `userId`.
Partner Id for partner integrations. NOT SUPPORTED.	`config.partnerId`
The event callback. NOT SUPPORTED. See middleware.	`config.callback`
`amplitude.libraryName`	NOT SUPPORTED.
`amplitude.libraryVersion`	NOT SUPPORTED.
`amplitude.adSupportBlock`	NOT SUPPORTED. See Plugins.
`amplitude.useAdvertisingIdForDeviceId`	NOT SUPPORTED. See Plugins.
`amplitude.locationInfoBlock`	`amplitude.locationInfoBlock`
`amplitude.deferCheckInForeground`	NOT SUPPORTED.
`amplitude.setOffline(Yes)`	NOT SUPPORTED.
`amplitude.setContentTypeHeader("YOUR-CONTENT-TYPE-HEADER")`	NOT SUPPORTED.
`amplitude.setPlan(plan)`	`config.plan`
`plan.setBranch("YOUR-BRANCH")`	`config.plan.branch`
`plan.setSource("YOUR-SOURCE")`	`config.plan.source`
`plan.setVersion("YOUR-VERSION")`	`config.plan.version`
`plan.setVersionId("YOUR-VERSION-ID")`	`config.plan.versionId`
`amplitude.setTrackingOptions(options)`	`config.trackingOptions`
`amplitude.setSessionId(timestamp)`	NOT SUPPORTED.

Tracking events¶

The maintenance iOS SDK offered a variety of logEvent APIs with withEventProperties, withApiProperties, withUserProperties, withGroup, withGroupProperties, withTimestamp, outOfSession, to override specific properties in the event payload. Amplitude has simplified all these variations into a unified track API.

`logEvent()`¶

The logEvent() API maps to track().

SwiftObjective-C

let eventType = "Button Clicked"
let eventProperties: [String: Any] = ["key": "value"]

- Amplitude.instance().logEvent(
-  eventType, 
-  withEventProperties: eventProperties
- )
+ let event = BaseEvent(
+   eventType: eventType,
+   eventProperties: eventProperties
+ )
+ amplitude.track(event)

NSString* eventType = @"Button Clicked";
NSDictionary* eventProperties = @{@"key": @"value"};

- [[Amplitude instance] logEvent:eventType withEventProperties:eventProperties];
+ AMPBaseEvent* event = [AMPBaseEvent initWithEventType:eventType
+     eventProperties:eventProperties];
+ [amplitude track:event];

`logEvent withTimestamp`¶

The logEvent() API maps to track().

SwiftObjective-C

let eventType = "Button Clicked"
let timestamp = Int64(NSDate().timeIntervalSince1970 * 1000)
- Amplitude.instance().logEvent(
-  eventType,
-  withTimestamp: timestamp
- )
+ let event = BaseEvent(
+   eventType: eventType,
+   timestamp: timestamp
+ )
+ amplitude.track(event)

NSString* eventType = @"Button Clicked";
NSNumber* timestamp = [NSNumber numberWithLongLong:[[NSDate date] timeIntervalSince1970] * 1000];

- [[Amplitude instance] logEvent:eventType withTimestamp:timestamp];
+ AMPBaseEvent* event = [AMPBaseEvent initWithEventType:eventType];
+ event.timestamp = [timestamp longLongValue];
+ [amplitude track:event];

`logEvent withGroup`¶

The logEvent() API maps to track().

SwiftObjective-C

let eventType = "Button Clicked"
let eventProperties: [String: Any] = ["key": "value"]
let groups: [String: Any] = ["orgId": 10]

- Amplitude.instance().logEvent(
-  eventType,
-  withEventProperties: eventProperties,
-  withGroups: groups
- )
+ let event = BaseEvent(
+   eventType: eventType,
+   eventProperties: eventProperties,
+   groups: groups
+ )
+ amplitude.track(event)

NSString* eventType = @"Button Clicked";
NSDictionary* eventProperties = @{@"key": @"value"};

- NSDictionary* groups = @{@"orgId": @"10"};
- [[Amplitude instance] logEvent:eventType
-     withEventProperties:eventProperties
-     withGroups:groups];
+ AMPBaseEvent* event = [AMPBaseEvent initWithEventType:eventType
+     eventProperties:eventProperties];
+ [event.groups set:@"orgId" value:@"10"];
+ [amplitude track:event];

`uploadEvents()`¶

The uploadEvents() API maps to flush().

SwiftObjective-C

- Amplitude.instance().uploadEvents()
+ amplitude.flush()

- [[Amplitude instance] uploadEvents];
+ [amplitude flush];

Set user properties¶

The APIs for setting user properties are the same, except for the removal of instance(). Here are code snippets to migrate APIs for user properties.

`setUserId()`¶

Id length limit

The maintenance SDK uses an old SDK endpoint (api2.amplitude.com) which enforces no length limit for deviceId and userId. The latest SDK uses Amplitude's HTTP V2 API (api2.amplitude.com/2/httpapi) and requires identifiers to be at least 5 characters by default. When you migrate to the latest SDK, set config.minIdLength to a smaller value if you allowed identifiers with fewer than 5 characters.

Setting a user ID can be invoked on amplitude without calling getInstance().

SwiftObjective-C

let userId = "TEST-USER-ID"
- Amplitude.instance().setUserId(userId)
+ amplitude.setUserId(userId: userId)

NSString* userId = @"TEST-USER-ID";
- [[Amplitude instance] setUserId:userId];
+ [amplitude setUserId:userId];

`setDeviceId()`¶

Id length limit

The maintenance SDK uses an old SDK endpoint (api2.amplitude.com) which enforces no length limit for deviceId and userId. The latest SDK uses Amplitude's HTTP V2 API (api2.amplitude.com/2/httpapi) and requires identifiers to be at least 5 characters by default. When you migrate to the latest SDK, set config.minIdLength to a smaller value if you allowed identifiers with fewer than 5 characters.

Set a device ID on amplitude without calling instance().

SwiftObjective-C

let deviceId = "TEST-DEVICE-ID"
- Amplitude.instance().setDeviceId(deviceId)
+ amplitude.setDeviceId(deviceId: deviceId)

NSString* deviceId = @"TEST-DEVICE-ID";
- [[Amplitude instance] setDeviceId:deviceId];
+ [amplitude setDeviceId:deviceId];

`clearUserProperties()`¶

The clearUserProperties API has been removed, but you can now use the unified identify API to remove user properties.

SwiftObjective-C

- Amplitude.instance().clearUserProperties()
+ let identify = Identify()
+ identify.clearAll()
+ amplitude.identify(identify: identify)

- [[Amplitude instance] clearUserProperties];
+ AMPIdentify* identify = [AMPIdentify new];
+ [identify clearAll];
+ [amplitude identify:identify];

`setUserProperties()`¶

The setUserProperties API has been removed, but you can now use the unified identify API to add user properties.

SwiftObjective-C

- Amplitude.instance().setUserProperties([
-   "membership": "paid",
-   "payment": "bank",
- ])
+ amplitude.identify(userProperties: [
+   "membership": "paid",
+   "payment": "bank"
+ ])

- [[Amplitude instance] setUserProperties:@{
-     @"membership": @"paid",
-     @"payment": @"bank"
- }];
+ AMPIdentify* identify = [AMPIdentify new];
+ [identify set:@"membership" value:@"paid"];
+ [identify set:@"payment" value:@"bank"];
+ [amplitude identify:identify];

`identify()`¶

You can now make an identify call on amplitude without calling instance().

SwiftObjective-C

- let identify = AMPIdentify()
- identify.set("membership", value: "paid")
- Amplitude.instance().identify(identify)
+ let identify = Identify()
+ identify.set(property: "membership", value: "paid")
+ amplitude.identify(identify: identify)

AMPIdentify* identify = [AMPIdentify new];
[identify set:@"membership" value:@"paid"];

- [[Amplitude instance] identify:identify];
+ [amplitude identify:identify];

Set group properties¶

`groupIdentify()`¶

You can now make an identify call on amplitude without calling instance().

SwiftObjective-C

- let identify = AMPIdentify()
- identify.set("membership", value: "paid")
- Amplitude.instance().groupIdentify(
-   withGroupType: "TEST-GROUP-TYPE", 
-   groupName: "TEST-GROUP-NAME", 
-   groupIdentify: identify
- )

+ let identify = Identify()
+ identify.set(property: "membership", value: "paid")
+ amplitude.groupIdentify(
+   groupType: "TEST-GROUP-TYPE", 
+   groupName: "TEST-GROUP-NAME", 
+   identify: identify
+ )

AMPIdentify* identify = [AMPIdentify new];
[identify set:@"membership" value:@"paid"];

- [[Amplitude instance] groupIdentifyWithGroupType:@"TEST-GROUP-TYPE"
-     groupName:@"TEST-GROUP-NAME"
-     groupIdentify:identify];
+ [amplitude groupIdentify:@"TEST-GROUP-TYPE"
+     groupName:@"TEST-GROUP-NAME"
+     identify:identify];

Tracking revenue¶

`logRevenueV2()`¶

Track revenue using revenue() API on amplitude without calling instance().

SwiftObjective-C

- let revenue = AMPRevenue()
- revenue.setProductIdentifier("productIdentifier")
- revenue.setQuantity(3)
- revenue.setPrice(NSNumber(value: 3.99))
- Amplitude.instance().logRevenueV2(revenue)

+ let revenue = Revenue()
+ revenue.productId = "productIdentifier"
+ revenue.quantity = 3
+ revenue.price = 3.99
+ amplitude.revenue(revenue: revenue)

AMPRevenue* revenue = [AMPRevenue new];

- [revenue setProductIdentifier:@"productidentifier"];
- [revenue setQuantity:3];
- [revenue setPrice:@3.99];
- [[Amplitude instance] logRevenueV2:revenue];
+ revenue.productId = @"productidentifier";
+ revenue.quantity = 3;
+ revenue.price = 3.99;
+ [amplitude revenue:revenue];

Patterns¶

Plugins¶

The configs amplitude.adSupportBlock or amplitude.useAdvertisingIdForDeviceId were available in Amplitude-iOS to allow you to use IDFV or IDFA as the deviceID. Although Amplitude-Swift doesn't support these configurations, you can add plugins to the new iOS SDK to enrich event payloads.

SwiftObjective-C

import AdSupport
import AmplitudeSwift
import AppTrackingTransparency
import Foundation
import SwiftUI

/// Plugin to collect IDFA values.  Users will be prompted if authorization status is undetermined.
/// Upon completion of user entry a track event is issued showing the choice user made.
///
/// Don't forget to add "NSUserTrackingUsageDescription" with a description to your Info.plist.
class IDFACollectionPlugin: Plugin {
    let type = PluginType.enrichment
    weak var amplitude: Amplitude? = nil

    func execute(event: BaseEvent?) -> BaseEvent? {
        let status = ATTrackingManager.trackingAuthorizationStatus
        var idfa = fallbackValue
        if status == .authorized {
            idfa = ASIdentifierManager.shared().advertisingIdentifier.uuidString
        }

        let workingEvent = event
        // The idfa on simulator is always 00000000-0000-0000-0000-000000000000
        event?.idfa = idfa
        // If you want to use idfa for the device_id
        event?.deviceId = idfa
        return workingEvent
    }
}

extension IDFACollectionPlugin {
    var fallbackValue: String? {
        // fallback to the IDFV value.
        // this is also sent in event.context.device.id,
        // feel free to use a value that is more useful to you.
        return UIDevice.current.identifierForVendor?.uuidString
    }
}

...
// To install your custom plugin, use 'add()' with your custom plugin as parameter.
amplitude.add(plugin: IDFACollectionPlugin())

@import AmplitudeSwift;
#import <AppTrackingTransparency/AppTrackingTransparency.h>
#import <AdSupport/ASIdentifierManager.h>

[amplitude add:[AMPPlugin initWithType:AMPPluginTypeEnrichment execute:^AMPBaseEvent* _Nullable(AMPBaseEvent* _Nonnull event) {
    ATTrackingManagerAuthorizationStatus status = ATTrackingManager.trackingAuthorizationStatus;

    // fallback to the IDFV value.
    // this is also sent in event.context.device.id,
    // feel free to use a value that is more useful to you.
    NSUUID* idfaUUID = [UIDevice currentDevice].identifierForVendor;

    if (status == ATTrackingManagerAuthorizationStatusAuthorized) {
        idfaUUID = [ASIdentifierManager sharedManager].advertisingIdentifier;
    }

    NSString* idfa = (idfaUUID != nil) ? idfaUUID.UUIDString : nil;

    // The idfa on simulator is always 00000000-0000-0000-0000-000000000000
    event.idfa = idfa;
    // If you want to use idfa for the device_id
    event.deviceId = idfa;
    return event;
}]];

Callback¶

Amplitude-Swift supports configuration-level and event-level callback functions which are called for success and error upload. Configuration-level callback applies for every success and error event upload. Event-level callback is specific for one Event. Notice that the event-level callbacks are stored in cache, those callbacks are lost if the app crashes.

Configuration-level callbacks:

SwiftObjective-C

let amplitude = Amplitude(
    configuration: Configuration(
        apiKey: "TEST-API-KEY",
        callback: { (event: BaseEvent, code: Int, message: String) -> Void in
            print("eventCallback: \(event), code: \(code), message: \(message)")
        },
    )
)

AMPConfiguration* configuration = [AMPConfiguration initWithApiKey:@"YOUR-API-KEY"];
configuration.callback = ^(AMPBaseEvent* _Nonnull event, NSInteger code, NSString* _Nonnull message) {
    NSLog(@"eventCallback: %@, code: %@, message: %@", event.eventType, @(code), message);
};
Amplitude* amplitude = [Amplitude initWithConfiguration:configuration];

Event-level callbacks:

SwiftObjective-C

let event = BaseEvent(
  callback: { (event: BaseEvent, code: Int, message: String) -> Void in
      print("eventCallback: \(event), code: \(code), message: \(message)")
  }, 
  eventType: "TEST-EVENT-TYPE")

amplitude.track(event: event)

AMPBaseEvent* event = [AMPBaseEvent initWithEventType:@"TEST-EVENT-TYPE"];
event.callback = ^(AMPBaseEvent* _Nonnull event, NSInteger code, NSString* _Nonnull message) {
    NSLog(@"eventCallback: %@, code: %@, message: %@", event.eventType, @(code), message);
};

[amplitude track:event];

or

SwiftObjective-C

let event2 = BaseEvent(eventType:"test")

amplitude.track(
  event: event2, 
  callback: { (event: BaseEvent, code: Int, message: String) -> Void in
      print("eventCallback: \(event), code: \(code), message: \(message)")
})

AMPBaseEvent* event2 = [AMPBaseEvent initWithEventType:@"test"];

[amplitude track:event2 callback:^(AMPBaseEvent* _Nonnull event, NSInteger code, NSString* _Nonnull message) {
    NSLog(@"eventCallback: %@, code: %@, message: %@", event.eventType, @(code), message);
}];

Comparison¶

This section provides a comparison between different version of SDKs. This overview provides key insights for developers, identifying areas that have significant changes and need careful consideration.

Note

While there are multiple versions of our SDK available, please use the latest version of the SDKs rather than maintenance SDKs. Maintenance versions only provide support and will eventually be deprecated. The latest SDK adopts an aligned architecture, with no extra dependencies, and offers enhanced stability for optimal performance.

Feature	Latest iOS SDK	Maintenance iOS SDK
Package	AmplitudeSwift	Amplitude
Configuration	Configuration is implemented by the configuration object. Configurations need to be passed into Amplitude Object during initialization. More configurations. Latest iOS SDK support more configurations. Check here for more details.	Supports specific setter methods. More configurations
Logger Provider	ConsoleLogger() by default. Fully customizable.	AMPLITUDE_LOG, config through macro.
Storage Provider	PersistentStorage() by default. File storage and iOS user’s defaults database. Fully customizable (not supported in Objective-C).	SQLite Database.
Customization	Plugins	Middleware
Server Endpoint	HTTP V2 API	HTTP V1 API
Batch API	Yes, with configuration.	Not supported.

Data migration¶

Existing maintenance SDK data (events, user/device ID) are moved to the latest SDK by default. It can be disabled by setting migrateLegacyData to false in the Configuration.

SwiftObjective-C

amplitude = Amplitude(
    Configuration(
        ...
        migrateLegacyData: false,
    )
)

AMPConfiguration* configuration = [AMPConfiguration initWithApiKey:@"YOUR-API-KEY"];
configuration.migrateLegacyData = false;
Amplitude* amplitude = [Amplitude initWithConfiguration:configuration];

iOS SDK Migration Guide

Terminology¶

Dependencies¶

CocoaPods¶

Swift Package Manager¶

Carthage¶

Instrumentation¶

Initialization¶

Configuration¶

Tracking events¶

logEvent()¶

logEvent withTimestamp¶

logEvent withGroup¶

uploadEvents()¶

Set user properties¶

setUserId()¶

setDeviceId()¶

clearUserProperties()¶

setUserProperties()¶

identify()¶

Set group properties¶

groupIdentify()¶

Tracking revenue¶

logRevenueV2()¶

Patterns¶

Plugins¶

Callback¶

Comparison¶

Data migration¶

Was this page helpful?

`logEvent()`¶

`logEvent withTimestamp`¶

`logEvent withGroup`¶

`uploadEvents()`¶

`setUserId()`¶

`setDeviceId()`¶

`clearUserProperties()`¶

`setUserProperties()`¶

`identify()`¶

`groupIdentify()`¶

`logRevenueV2()`¶