## Set Synerise delegate --- This method sets an object for Synerise delegate methods. **Declared In:** Headers/SNRSynerise.h **Related To:** [SyneriseDelegate](/developers/mobile-sdk/listeners-and-delegates/ios-delegates#synerise-delegate) **Class:** Synerise **Declaration:**

```Swift static func setDelegate(_ delegate: SyneriseDelegate) ```

```Objective-C + (void)setDelegate:(SNRSyneriseDelegate *)delegate ```

**Discussion:** Learn more about the methods and the purpose of this listener [here](/developers/mobile-sdk/listeners-and-delegates/ios-delegates#synerise-delegate). ## Initialization --- This method initializes Synerise.

This method must be called before any other Synerise SDK method and only once during the application's lifecycle.

**Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func initialize(apiKey: String) -> Void ```

```Objective-C + (void)initializeWithApiKey:(NSString *)apiKey ```

Before version 5.0.0, this method was called `Synerise.initialize(clientApiKey:)`.

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **apiKey** | String | yes | - | Synerise Profile (formerly Client) API Key | **Return Value:** No value is returned. **Example:**

```Swift let apiKey = "YOUR_PROFILE_API_KEY" Synerise.initialize(apiKey: apiKey) ```

```Objective-C static NSString *apiKey = @"YOUR_PROFILE_API_KEY"; [SNRSynerise initializeWithApiKey:apiKey]; ```

## Initialize with custom environment --- This method initializes Synerise SDK with custom environment settings.

This method must be called before any other Synerise SDK method and only once during the application's lifecycle.

**Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func initialize(apiKey: String, baseUrl: String?) -> Void ```

```Objective-C + (void)initializeWithApiKey:(NSString *)apiKey andBaseUrl:(nullable NSString *)baseUrl ```

Before version 5.0.0, this method was called `Synerise.initialize(clientApiKey:baseUrl:)`.

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **apiKey** | String | yes | - | Synerise Profile (formerly Client) API Key | | **baseUrl** | String | no | - | Synerise API custom environment base URL | You can use one of the constants:

**SyneriseApiUrls.SYNERISE_AZ_API_URL** - `https://api.snrapi.com` **SyneriseApiUrls.SYNERISE_AZU_API_URL** - `https://api.azu.snrapi.com` **SyneriseApiUrls.SYNERISE_GEB_API_URL** - `https://api.geb.snrapi.com`

**SNR_SYNERISE_AZ_API_URL** - `https://api.snrapi.com` **SNR_SYNERISE_AZU_API_URL** - `https://api.azu.snrapi.com` **SNR_SYNERISE_GEB_API_URL** - `https://api.geb.snrapi.com`

**Return Value:** No value is returned. **Example:**

```Swift let apiKey = "YOUR_PROFILE_API_KEY" let apiBaseUrl = "YOUR_API_BASE_URL" Synerise.initialize(apiKey: apiKey, baseUrl: apiBaseUrl) ```

```Objective-C static NSString *apiKey = @"YOUR_PROFILE_API_KEY"; static NSString *apiBaseUrl = @"YOUR_API_BASE_URL"; [SNRSynerise initializeWithApiKey:apiKey andBaseUrl:apiBaseUrl]; ```

## Change Profile API Key dynamically --- This method changes a Profile (formerly Client) API key dynamically. **Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func changeApiKey(_ apiKey: String) -> Void ```

```Objective-C + (void)changeApiKey:(nonnull NSString *)apiKey ```

Before version 5.0.0, this method was called `Synerise.changeClientApiKey(_ clientApiKey:)`.

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **apiKey** | String | yes | - | Synerise Profile API Key (formerly Client API key) | **Return Value:** No value is returned. ## Change Profile API Key dynamically with config --- This method changes a Profile (formerly Client) API key dynamically, with additional parameters. It can include a salt for [Simple Profile Authentication](/developers/mobile-sdk/user-identification-and-authorization/simple-authentication) requests. | | **iOS SDK** | **Android SDK** | **React Native SDK** | **Flutter SDK** | | --- | --- | --- | --- | --- | | Introduced in: | 4.19.0 | 5.20.0 | 0.23.0 | 1.3.0 | **Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func changeApiKey(_ apiKey: String, config: InitializationConfig?) -> Void ```

```Objective-C + (void)changeApiKey:(nonnull NSString *)apiKey config:(nullable SNRInitializationConfig *)config; ```

Before version 5.0.0, this method was called `Synerise.changeClientApiKey(_ clientApiKey:config:)`.

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **apiKey** | String | yes | - | Synerise Profile API Key (formerly Client API key) | | **config** | [InitializationConfig](/developers/mobile-sdk/class-reference/ios/lifecycle#initializationconfig) | no | - | Object for additional initialization settings after the API key change | **Return Value:** No value is returned. ## Set Request Validation Salt --- This method sets the salt string for request validation. | | **iOS SDK** | **Android SDK** | **React Native SDK** | **Flutter SDK** | | --- | --- | --- | --- | --- | | Introduced in: | 4.14.0 | 5.7.1 | 0.15.0 | 0.7.0 | **Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func setRequestValidationSalt(_: String?) -> Void ```

```Objective-C + (void)setRequestValidationSalt:(nullable NSString *)string ```

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **salt** | String | no | - | Synerise Profile salt string for request validation | **Return Value:** No value is returned. ## Set up host application type --- This method sets the Synerise SDK host application type. | | **iOS SDK** | **Android SDK** | **React Native SDK** | **Flutter SDK** | | --- | --- | --- | --- | --- | | Introduced in: | 3.6.1 | 3.6.22 | - | - | **Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func setHostApplicationType(_ type: HostApplicationType) -> Void ```

```Objective-C + (void)setHostApplicationType:(SNRHostApplicationType)type ```

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **type** | [HostApplicationType](/developers/mobile-sdk/class-reference/ios/miscellaneous#hostapplicationtype) | yes | - | Specifies the type of host application | **Return Value:** No value is returned. ## Set host application SDK plugin version --- This method sets the Synerise SDK plugin version. | | **iOS SDK** | **Android SDK** | **React Native SDK** | **Flutter SDK** | | --- | --- | --- | --- | --- | | Introduced in: | 4.14.6 | 5.11.0 | - | - | **Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func setHostApplicationSDKPluginVersion(_ version: String) -> Void ```

```Objective-C + (void)setHostApplicationSDKPluginVersion:(NSString *)version ```

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **version** | String | yes | - | Specifies the version of the Synerise SDK plugin in the host application | **Return Value:** No value is returned. ## Enable Debug Mode --- This method enables or disables console logs from Synerise SDK.

It is not recommended to use debug mode in the release version of your application.

**Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func setDebugModeEnabled(_: Bool) -> Void ```

```Objective-C + (void)setDebugModeEnabled:(BOOL)enabled; ```

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **enabled** | Bool | yes | - | Enables or disables console logs | **Return Value:** No value is returned. ## Enable Crash Handling --- This method enables or disables crash handling by Synerise SDK.

If set to true, Synerise SDK will send the `client.applicationCrashed` event with information about crash.

**Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func setCrashHandlingEnabled(_: Bool) -> Void ```

```Objective-C + (void)setCrashHandlingEnabled:(BOOL)enabled ```

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **enabled** | Bool | yes | - | Enables or disables crash handling | **Return Value:** No value is returned. ## Set Background Task identifiers --- This method sets identifiers for Background Tasks processing. | | **iOS SDK** | **Android SDK** | **React Native SDK** | **Flutter SDK** | | --- | --- | --- | --- | --- | | Introduced in: | 4.23.0 | - | - | - |

Do not use those identifiers for other Background Tasks in your app.

**Declared In:** Headers/SNRSynerise.h **Class:** [Synerise](/developers/mobile-sdk/class-reference/ios/modules#synerise) **Declaration:**

```Swift static func setBackgroundTaskIdentifiers(_: [String]) -> Void ```

```Objective-C + (void)setBackgroundTaskIdentifiers:(NSArray *)identifiers ```

**Parameters:** | Parameter | Type | Mandatory | Default | Description | | --- | --- | --- | --- | --- | | **identifiers** | [String] | yes | - | Identifiers for Background Tasks registered in the host appliaction. | **Return Value:** No value is returned.