#import <OptimizelySDKiOS/OptimizelySDKiOS.h>

OPTLYManager *manager = [OPTLYManager init:^(OPTLYManagerBuilder * _Nullable builder) {
  builder.projectId = @"projectId";
}];

// Asynchronously initialize the Optimizely client
[manager initializeWithCallback:^(NSError * _Nullable error, OPTLYClient * _Nullable client) {
  // Activate an experiment
  OPTLYVariation *variation = [client activate:@"my_experiment" userId:@"user_123"];

  if ([variation.variationKey isEqualToString:@"variation_a"]) {
    // Execute code for variation A
  }
  else if ([variation.variationKey isEqualToString:@"variation_b"]) {
    // Execute code for variation B
  }
  else {
    // Execute default code
  }

  // Track an event
  [client track:@"purchase_completed" userId:@"user_123"];
}];

import OptimizelySDKiOS

let optimizelyManager = OPTLYManager.init {(builder) in
  builder!.projectId = "projectId"
}

// Asynchronously initialize the Optimizely Client
manager?.initialize(callback: { [weak self] (error, client) in
  // Activate an experiment
  let variation = client?.activate("my_experiment", userId: "user_123")
  if (variation?.variationKey == "variation_a") {
	// Execute code for variation A
  }
  else if (variation?.variationKey == "variation_b") {
    // Execute code for variation B
  }
  else {
    // Execute default code
  }

  // Track an Event
  client?.track("purchase_completed", userId: "user_123")
})

import com.optimizely.ab.android.sdk.OptimizelyClient;

OptimizelyClient optimizelyClient = optimizelyManager.getOptimizely();

// Activate an experiment
Variation variation = optimizelyClient.activate("my_experiment", "user_123");

if (variation != null) {
  if (variation.is("variation_a")) {
    // Execute code for variation A
  } else if (variation.is("variation_b")) {
    // Execute code for variation B
  }
} else {
  // Execute default code
}

// Track an event
optimizelyClient.track("purchase_completed", "user_123");