## Errors and Exceptions --- ### SNRError
The default error domain for SDK errors is SNRErrorDomain.
**Declared In:** Headers/SNRError.h **Inherits From:** [NSError](https://developer.apple.com/documentation/foundation/nserror) **Conforms To:** [NSCopying](https://developer.apple.com/documentation/foundation/nscopying) [NSSecureCoding](https://developer.apple.com/documentation/foundation/nssecurecoding) **Declaration:**
```Swift class SNRError: NSError ```
```Objective-C @interface SNRError: NSError ```
There are global string constants that can be used to get specific information from the `userInfo` property: - SNRErrorUserInfoCodeKey - SNRErrorUserInfoTitleKey - SNRErrorUserInfoMessageKey - SNRErrorUserInfoFieldKey - SNRErrorUserInfoPathKey - SNRErrorUserInfoRejectedValueKey - SNRErrorUserInfoErrorsKey --- --- ### SNRApiError This method retrieves the HTTP code of an error.
```Swift func getHttpCode() -> Int ```
```Objective-C - (NSInteger)getHttpCode ```
--- This method retrieves the internal code of an error.
```Swift func getErrorCode() -> String? ```
```Objective-C - (nullable NSString *)getErrorCode ```
--- This method retrieves the description of an error.
```Swift func getBody() -> String? ```
```Objective-C - (nullable NSString *)getBody ```
--- --- ### SNRApiErrorType **Declared In:** Headers/SNRApiError.h **Declaration:**
```Swift enum SNRApiErrorType: Int { unknown, network, unauthorizedSession, http } ```
```Objective-C typedef NS_ENUM(NSInteger, SNRApiErrorType) { SNRApiErrorTypeUnknown, SNRApiErrorTypeNetwork, SNRApiErrorTypeUnauthorizedSession, SNRApiErrorTypeHttp }; ```
--- --- ### SNRException **Declared In:** Headers/SNRException.h **Inherits From:** [NSException](https://developer.apple.com/documentation/foundation/nsexception) **Conforms To:** [NSCopying](https://developer.apple.com/documentation/foundation/nscopying) **Declaration:**
```Swift class SNRException: NSException ```
```Objective-C @interface SNRException : NSException ```
**Properties:** | Property | Type | Optional | Description | | --- | --- | --- | --- | | **error** | [SNRError](/developers/mobile-sdk/class-reference/ios/miscellaneous#snrerror) | no | Error provided for Swift compatibility | **Methods:** Throws an exception.
```Swift static func throwException(exceptionName: NSExceptionName, reason: String) ```
```Objective-C + (void)throwException:(NSExceptionName)exceptionName reason:(nonnull NSString *)reason ```
--- --- ### SNRInvalidArgumentException **Declared In:** Headers/SNRInvalidArgumentException.h **Inherits From:** [SNRException](/developers/mobile-sdk/class-reference/ios/miscellaneous#snrexception) **Conforms To:** [NSCopying](https://developer.apple.com/documentation/foundation/nscopying) **Declaration:**
```Swift class SNRInvalidArgumentException: NSException ```
```Objective-C @interface SNRInvalidArgumentException : NSException ```
--- --- ## CacheManager **Declared In:** Headers/SNRCacheManager.h **Declaration:**
```Swift class CacheManager: NSObject ```
```Objective-C @interface SNRCacheManager : NSObject ```
**Methods:**
```Swift static func get(_: AnyClass) -> AnyObject ```
```Objective-C + (nullable id)get:(Class)aClass ```
--- --- ## Misc --- ### HostApplicationType **Declared In:** Headers/SNRHostApplicationType.h **Declaration:**
```Swift enum HostApplicationType: Int { unknown, native, reactNative, flutter, xamarin, other } ```
```Objective-C typedef NS_ENUM(NSUInteger, SNRHostApplicationType) { SNRHostApplicationTypeUnknown, SNRHostApplicationTypeNative, SNRHostApplicationTypeReactNative, SNRHostApplicationTypeFlutter, SNRHostApplicationTypeXamarin, SNRHostApplicationTypeOther } ```
**Functions:** Converts from **HostApplicationType** to **String**.
```Swift func SNR_HostApplicationTypeToString(_: HostApplicationType) -> String ```
```Objective-C NSString * SNR_HostApplicationTypeToString(SNRHostApplicationType type) ```
--- Converts from **String** to **HostApplicationType**.
```Swift func SNR_StringToHostApplicationType(_: String) -> HostApplicationType ```
```Objective-C SNRHostApplicationType SNR_StringToHostApplicationType(NSString * _Nullable string) ```
--- --- ### BaseModel **Declared In:** Headers/SNRBaseModel.h **Inherits From:** [NSObject](https://developer.apple.com/documentation/objectivec/nsobject) **Declaration:**
```Swift class BaseModel: NSObject ```
```Objective-C @interface SNRBaseModel : NSObject ```
--- --- ### ApiQuerySortingOrder **Declared In:** Headers/SNRApiQuerySortingOrder.h **Declaration:**
```Swift enum ApiQuerySortingOrder: Int { ascending, descending } ```
```Objective-C typedef NS_ENUM(NSUInteger, SNRApiQuerySortingOrder) { SNRApiQuerySortingOrderAscending, SNRApiQuerySortingOrderDescending } ```
**Functions:** Converts from **ApiQuerySortingOrder** to **String**.
```Swift func SNR_ApiQuerySortingOrderToString(_: ApiQuerySortingOrder) -> String ```
```Objective-C NSString * SNR_ApiQuerySortingOrderToString(SNRApiQuerySortingOrder type) ```
--- Converts from **String** to **ApiQuerySortingOrder**.
```Swift func SNR_StringToApiQuerySortingOrder(_: String) -> ApiQuerySortingOrder ```
```Objective-C SNRApiQuerySortingOrder SNR_StringToApiQuerySortingOrder(NSString * _Nullable string) ```
The following string constants can be used in API Query objects: - SNR_API_QUERY_SORTING_ASC - SNR_API_QUERY_SORTING_DESC
--- --- ### ScreenViewApiQuery The object to set parameters easily for fetching screen views from API. **Declared In:** Headers/SNRScreenViewApiQuery.h **Inherits From:** [NSObject](https://developer.apple.com/documentation/objectivec/nsobject) **Declaration:**
```Swift class ScreenViewApiQuery: NSObject ```
```Objective-C @interface SNRScreenViewApiQuery : NSObject ```
**Properties:** | Property | Type | Optional | Default | Description | | --- | --- | --- | --- | --- | | **feedSlug** | String | no | nil | Identifies a specific screen view feed | | **productID** | String | yes | nil | Item identifier | | **params** | [String: Any] | yes | nil | Additional parameters to pass for [Inserts in the screen view](/developers/inserts/screen-views-documents#handling-variables-when-displaying-screen-viewsdocuments). For example, if the insert is `{{ foo }}`, you need to pass the value of `foo` | **Initializers:**
```Swift init(feedSlug: String, productID: String?) ```
```Objective-C - (instancetype)initWithFeedSlug:(NSString *)feedSlug productID:(nullable NSString *)productID ```
--- --- ### ScreenView **Declared In:** Headers/SNRScreenView.h **Related To:** [ScreenViewAudienceInfo](/developers/mobile-sdk/class-reference/ios/miscellaneous#screenviewaudienceinfo) **Inherits From:** [BaseModel](/developers/mobile-sdk/class-reference/ios/miscellaneous#basemodel) **Declaration:**
```Swift class ScreenView: BaseModel ```
```Objective-C @interface SNRScreenView : SNRBaseModel ```
**Properties:** | Property | Type | Optional | Description | | --- | --- | --- | --- | | **identifier** | String | no | Screen View's ID | | **name** | String | no | Screen View's name | | **hashString** | String | no | Screen View's hash | | **path** | String | no | URL of the screen view's definition | | **priority** | Int | no | Screen View's priority (1-99, where 1 is the highest) | | **audience** | [ScreenViewAudienceInfo](/developers/mobile-sdk/class-reference/ios/miscellaneous#screenviewaudienceinfo) | no | Audience of a Screen View | | **data** | AnyObject | no | Content of the screen view | | **createdAt** | Date | no | Screen View's creation date | | **updatedAt** | Date | no | Screen View's update date |
All properties are read-only.
--- --- ### ScreenViewAudienceInfo **Declared In:** Headers/SNRScreenViewAudience.h **Related To:** [ScreenView](/developers/mobile-sdk/class-reference/ios/miscellaneous#screenview) **Inherits From:** [BaseModel](/developers/mobile-sdk/class-reference/ios/miscellaneous#basemodel) **Declaration:**
```Swift class ScreenViewAudienceInfo: BaseModel ```
```Objective-C @interface SNRScreenViewAudienceInfo : SNRBaseModel ```
**Properties:** | Property | Type | Optional | Description | | --- | --- | --- | --- | | **segments** | [String] | yes | Audience's segments | | **query** | String | yes | Audience's query | | **targetType** | String | yes | Audience's target type |
All properties are read-only.
--- --- ### BrickworksApiQuery Object responsible for creating a query to the Brickworks API. **Declared In:** Headers/SNRBrickworksApiQuery.h **Inherits From:** [NSObject](https://developer.apple.com/documentation/objectivec/nsobject-swift.class) **Declaration:** 
class BrickworksApiQuery: NSObject
@interface SNRBrickworksApiQuery : NSObject
**Properties:** | Property | Type | Optional | Description | | ---------------- | ------ | --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **schemaSlug** | String | no | Unique identifier (`appName`/API name) of a schema | | **recordSlug** | String | yes1 | Unique identifier (`slug`/slug) of a record | | **recordId** | String | yes1 | Unique identifier (`id`/UUID) of a record | | **context** | Object | yes | Key/value properties for `{{ context.keyName }}` inserts in the record | | **fieldContext** | Object | yes | Additional properties for [recommendation](/docs/assets/brickworks/synerise-objects#ai-recommendation) and [many-to-one](/docs/assets/brickworks/schema-field-types#one-to-many) field types | **Initializers**
You can use the record slug or ID. 
init(schemaSlug: String, recordSlug: String)

init(schemaSlug: String, recordId: String)
You can use the record slug or ID. 
(instancetype)initWithSchemaSlug:(NSString *)schemaSlug recordSlug:(NSString *)recordSlug

(instancetype)initWithSchemaSlug:(NSString *)schemaSlug recordId:(NSString *)recordId
--- --- ## Removed symbols --- ### ScreenViewResponse {#screenviewresponse} **Declared In:** Headers/SNRScreenViewResponse.h **Related To:** [ScreenViewAudience](/developers/mobile-sdk/class-reference/ios/miscellaneous#screenviewaudience) **Inherits From:** [BaseModel](/developers/mobile-sdk/class-reference/ios/miscellaneous#basemodel) **Declaration:**
```Swift class ScreenViewResponse: BaseModel ```
```Objective-C @interface SNRScreenViewResponse : SNRBaseModel ```
**Properties:** | Property | Type | Optional | Description | | --- | --- | --- | --- | | **audience** | [ScreenViewAudience](/developers/mobile-sdk/class-reference/ios/miscellaneous#screenviewaudience) | no | Audience of a screen view | | **identifier** | String | no | Screen view's ID | | **hashString** | String | no | Screen view's hash | | **path** | String | no | URL of the screen view's definition | | **name** | String | no | Screen view's name | | **priority** | NSNumber | no | Screen View's priority (1-99, where 1 is the highest) | | **descriptionText** | String | yes | Screen view's description | | **data** | AnyObject | no | Content of the screen view | | **version** | String | no | Version of a screen view | | **parentVersion** | String | yes | Parent version of a screen view | | **createdAt** | Date | no | Screen view's creation date | | **updatedAt** | Date | no | Screen view's update date | | **deletedAt** | Date | yes | Screen view's deletion date |
All properties are read-only.
--- --- ### ScreenViewAudience {#screenviewaudience} **Declared In:** Headers/SNRScreenViewAudience.h **Related To:** [ScreenViewResponse](/developers/mobile-sdk/class-reference/ios/miscellaneous#screenviewresponse) **Inherits From:** [BaseModel](/developers/mobile-sdk/class-reference/ios/miscellaneous#basemodel) **Declaration:**
```Swift class ScreenViewAudience: BaseModel ```
```Objective-C @interface SNRScreenViewAudience : SNRBaseModel ```
**Properties:** | Property | Type | Optional | Description | | --- | --- | --- | --- | | **IDs** | [String] | yes | Audience's identifiers | | **query** | String | yes | Audience's query |
All properties are read-only.