### TrackerParams
Represents custom parameters that may be added to tracked events.
**Declared In:**
Headers/SNRTrackerParams.h
**Related To:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Inherits From:**
[NSObject](https://developer.apple.com/documentation/objectivec/nsobject)
**Declaration:**
Swift Objective-C
```Swift
class TrackerParams: NSObject
```
```Objective-C
@interface SNRTrackerParams : NSObject
```
**Initializers:**
Swift Objective-C
```Swift
static func makeWithBuilder(_: ((TrackerParamsBuilder) -> ()))
```
```Objective-C
+ (instancetype)makeWithBuilder:(nonnull void (^)(SNRTrackerParamsBuilder *builder))buildBlock
```
---
---
### TrackerParamsBuilder
Object that is used to create parameters for the event classes.
**Declared In:**
Headers/SNRTrackerParamsBuilder.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Inherits From:**
[NSObject](https://developer.apple.com/documentation/objectivec/nsobject)
**Declaration:**
Swift Objective-C
```Swift
class TrackerParamsBuilder: NSObject
```
```Objective-C
@interface SNRTrackerParamsBuilder : NSObject
```
**Initializers:**
Swift Objective-C
```Swift
init()
```
```Objective-C
- (instancetype)init
```
**Methods:**
Swift Objective-C
```Swift
func setString(_: String)
```
```Objective-C
- (void)setString:(nonnull NSString *)string forKey:(nonnull NSString *)key
```
---
Swift Objective-C
```Swift
func setInt(_: Int)
```
```Objective-C
- (void)setInt:(NSInteger)integer forKey:(nonnull NSString *)key
```
---
Swift Objective-C
```Swift
func setDouble(_: Double)
```
```Objective-C
- (void)setDouble:(double)doubleValue forKey:(nonnull NSString *)key
```
---
Swift Objective-C
```Swift
func setFloat(_: Float)
```
```Objective-C
- (void)setFloat:(float)floatValue forKey:(nonnull NSString *)key
```
---
Swift Objective-C
```Swift
func setBool(_: Bool)
```
```Objective-C
- (void)setBool:(BOOL)boolValue forKey:(nonnull NSString *)key
```
---
Swift Objective-C
```Swift
func setObject(_: AnyClass)
```
```Objective-C
- (void)setObject:(nonnull id)object forKey:(nonnull NSString *)key
```
---
---
### Event
Main event abstract class for inheriting classes.
This is an abstract class and it is not meant to be instantiated directly. You should use concrete `Event` subclasses instead.
Swift Objective-C
```Swift
class Event: NSObject
```
```Objective-C
@interface SNREvent : NSObject
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label
```
---
Swift Objective-C
```Swift
init(label: String, params: TrackerParams)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label andParams:(nullable SNRTrackerParams *)params
```
---
---
### CustomEvent
DO NOT send `transaction.charge` events as custom events.
Swift Objective-C
```Swift
class CustomEvent: Event
```
```Objective-C
@interface SNRCustomEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(type: String, label: String, action: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithType:(nonnull NSString *)type label:(nonnull NSString *)label action:(nonnull NSString *)action andParams:(nullable SNRTrackerParams *)params
```
Swift Objective-C
```Swift
init(label: String, action: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label action:(nonnull NSString *)action andParams:(nullable SNRTrackerParams *)params
```
Swift Objective-C
```Swift
init(label: String, action: String)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label action:(nonnull NSString *)action
```
---
---
### PushViewedEvent
Represents a 'client viewed push' event.
This event is used for push message interaction tracking.
**Declared In:**
Headers/SNRPushViewedEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class PushViewedEvent: Event
```
```Objective-C
@interface SNRPushViewedEvent : SNREvent
```
---
---
### PushClickedEvent
Represents a 'client clicked push' event.
This event is used for push message interaction tracking.
**Declared In:**
Headers/SNRPushClickedEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class PushClickedEvent: Event
```
```Objective-C
@interface SNRPushClickedEvent : SNREvent
```
---
---
### PushCancelledEvent
Represents a 'client viewed push' event.
This event is used for push message interaction tracking.
**Declared In:**
Headers/SNRCancelledPushEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class CancelledPushEvent: Event
```
```Objective-C
@interface SNRCancelledPushEvent : SNREvent
```
---
---
### CartEvent
Main cart action abstract class for inheriting classes.
This is an abstract class and it is not meant to be instantiated directly. You should use concrete `CartEvent` subclasses instead.
Swift Objective-C
```Swift
class CartEvent: Event
```
```Objective-C
@interface SNRCartEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String, sku String, finalPrice: UnitPrice, quantity: Int, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label sku:(nonnull NSString *)sku finalPrice:(nonnull SNRUnitPrice *)unitPrice quantity:(NSInteger)quantity andParams:(nullable SNRTrackerParams *)params
```
---
Swift Objective-C
```Swift
init(label: String, sku: String, finalPrice: UnitPrice, quantity: Int)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label sku:(nonnull NSString *)sku finalPrice:(nonnull SNRUnitPrice *)unitPrice quantity:(NSInteger)quantity
```
**Methods:**
This method sets a value for the `name` parameter.
Swift Objective-C
```Swift
func setName(_: String)
```
```Objective-C
- (void)setName:(nonnull NSString *)name
```
---
This method sets a value for the `category` parameter.
Swift Objective-C
```Swift
func setCategory(_: String)
```
```Objective-C
- (void)setCategory:(nonnull NSString *)category
```
---
This method sets values for the `categories` parameter.
Swift Objective-C
```Swift
func setCategories(_: [String])
```
```Objective-C
- (void)setCategories:(nonnull NSArray *)categories
```
---
This method sets a value for the `offline` parameter.
Swift Objective-C
```Swift
func setOffline(_: Bool)
```
```Objective-C
- (void)setOffline:(BOOL)isOffline
```
---
This method sets the value of the `regularPrice` parameter.
Swift Objective-C
```Swift
func setRegularPrice(_: UnitPrice)
```
```Objective-C
- (void)setRegularPrice:(nonnull SNRUnitPrice *)price
```
---
This method sets the value of the `discountedPrice` parameter.
Swift Objective-C
```Swift
func setDiscountedPrice(_: UnitPrice)
```
```Objective-C
- (void)setDiscountedPrice:(nonnull SNRUnitPrice *)price
```
---
This method sets the value of the `url` parameter.
Swift Objective-C
```Swift
func setURL(_: URL)
```
```Objective-C
- (void)setURL:(nonnull NSURL *)url
```
---
This method sets the value of the `producer` parameter (producer can signify a brand of the item).
Swift Objective-C
```Swift
func setProducer(_: String)
```
```Objective-C
- (void)setProducer:(nonnull NSString *)producer
```
---
---
### UnitPrice
**Declared In:**
Headers/SNRUnitPrice.h
**Inherits From:**
[NSObject](https://developer.apple.com/documentation/objectivec/nsobject)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class UnitPrice: NSObject
```
```Objective-C
@interface SNRUnitPrice : NSObject
```
**Initializers:**
Swift Objective-C
```Swift
init(amount: Float)
```
```Objective-C
- (instancetype)initWithAmount:(float)amount
```
---
Swift Objective-C
```Swift
init(amount: Float, locale: NSLocale)
```
```Objective-C
- (instancetype)initWithAmount:(float)amount locale:(nonnull NSLocale *)locale
```
---
---
### ProductAddedToCartEvent
Represents a 'client added product to cart' event.
**Declared In:**
Headers/SNRProductAddedToCartEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
[CartEvent](/developers/mobile-sdk/class-reference/ios/events#cartevent)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class ProductAddedToCartEvent: CartEvent
```
```Objective-C
@interface SNRProductAddedToCartEvent : SNRCartEvent
```
---
---
### ProductRemovedFromCartEvent
Represents a 'client removed product from cart' event.
**Declared In:**
Headers/SNRProductRemovedFromCartEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
[CartEvent](/developers/mobile-sdk/class-reference/ios/events#cartevent)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class ProductRemovedFromCartEvent: CartEvent
```
```Objective-C
@interface SNRProductRemovedFromCartEvent : SNRCartEvent
```
---
---
### ProductViewedEvent
Represents a 'client viewed product' event.
**Declared In:**
Headers/SNRProductViewedEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class ProductViewedEvent: Event
```
```Objective-C
@interface SNRProductViewedEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String, productName: String, productId: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label productName:(nonnull NSString *)productName productId:(nonnull NSString *)productId andParams:(nullable SNRTrackerParams *)params
```
**Methods:**
Sets if a product is recommended or not.
Swift Objective-C
```Swift
func setIsRecommended(_: Bool)
```
```Objective-C
- (void)setIsRecommended:(BOOL)isRecommended
```
---
This method sets a value for the `category` parameter.
Swift Objective-C
```Swift
func setCategory(_: String)
```
```Objective-C
- (void)setCategory:(NSString *)category
```
---
This method sets the value of the `url` parameter.
Swift Objective-C
```Swift
func setURL(_: URL)
```
```Objective-C
- (void)setURL:(NSURL *)url
```
---
---
### ProductAddedToFavoritesEvent
Represents a 'client added product to favorites' event.
**Declared In:**
Headers/SNRProductAddedToFavoritesEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class ProductAddedToFavoritesEvent: Event
```
```Objective-C
@interface SNRProductAddedToFavoritesEvent : SNREvent
```
---
---
### LoggedInEvent
Represents a 'client logged in' event.
**Declared In:**
Headers/SNRLoggedInEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events/#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events/#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events/#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class LoggedInEvent: Event
```
```Objective-C
@interface SNRLoggedInEvent : SNREvent
```
---
---
### LoggedOutEvent
Represents a 'client logged out' event.
**Declared In:**
Headers/SNRLoggedOutEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class LoggedOutEvent: Event
```
```Objective-C
@interface SNRLoggedOutEvent : SNREvent
```
---
---
### RegisteredEvent
Represents a 'client registered' event.
**Declared In:**
Headers/SNRCancelledPushEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class RegisteredEvent: Event
```
```Objective-C
@interface SNRRegisteredEvent : SNREvent
```
---
---
### RecommendationEvent
Main recommendation abstract class for inheriting classes.
This is an abstract class and it is not meant to be instantiated directly. You should use concrete `RecommendationEvent` subclasses instead.
Swift Objective-C
```Swift
class RecommendationEvent: Event
```
```Objective-C
@interface SNRRecommendationEvent : SNREvent
```
---
---
### RecommendationViewEvent
Represents a 'client viewed a recommendation' event.
**Declared In:**
Headers/SNRRecommendationViewEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
[RecommendationEvent](/developers/mobile-sdk/class-reference/ios/events#recommendationevent)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class RecommendationViewEvent: RecommendationEvent
```
```Objective-C
@interface SNRRecommendationViewEvent : SNRRecommendationEvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String, campaignID: String, campaignHash: String, correlationId: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(NSString *)label campaignID:(NSString *)campaignID campaignHash:(NSString *)campaignHash correlationId:(NSString *)correlationId andParams:(nullable SNRTrackerParams *)params
```
---
Swift Objective-C
```Swift
init(label: String, items: [String], campaignID: String, campaignHash: String, correlationId: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(NSString *)label items:(nullable NSArray *)items campaignID:(NSString *)campaignID campaignHash:(NSString *)campaignHash correlationId:(NSString *)correlationId andParams:(nullable SNRTrackerParams *)params
```
**Methods:**
This method sets a value for the `items` parameter.
Swift Objective-C
```Swift
func setItems(_ items: [String])
```
```Objective-C
- (void)setItems:(NSArray *)items
```
---
---
### RecommendationSeenEvent
Represents a 'client saw a recommendation' event.
**Declared In:**
Headers/SNRRecommendationSeenEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
[RecommendationEvent](/developers/mobile-sdk/class-reference/ios/events#recommendationevent)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class RecommendationSeenEvent: RecommendationEvent
```
```Objective-C
@interface SNRRecommendationSeenEvent : SNRRecommendationEvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String, productName: String, productId: String, campaignID: String, campaignHash: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label productName:(nonnull NSString *)productName productId:(nonnull NSString *)productId campaignID:(nonnull NSString *)campaignID campaignHash:(nonnull NSString *)campaignHash andParams:(nullable SNRTrackerParams *)params
```
**Methods:**
Set a product's category.
Swift Objective-C
```Swift
func setCategory(_: String)
```
```Objective-C
- (void)setCategory:(nonnull NSString *)category
```
---
Set a product's URL.
Swift Objective-C
```Swift
func setURL(_: URL)
```
```Objective-C
- (void)setURL:(nonnull NSURL *)url
```
---
---
### RecommendationClickEvent
Represents a 'client clicked a recommendation' event.
**Declared In:**
Headers/SNRRecommendationSeenEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
[RecommendationEvent](/developers/mobile-sdk/class-reference/ios/events#recommendationevent)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class RecommendationClickEvent: RecommendationEvent
```
```Objective-C
@interface SNRRecommendationClickEvent : SNRRecommendationEvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String, productName: String, productId: String, campaignID: String, campaignHash: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label productName:(nonnull NSString *)productName productId:(nonnull NSString *)productId campaignID:(nonnull NSString *)campaignID campaignHash:(nonnull NSString *)campaignHash andParams:(nullable SNRTrackerParams *)params
```
**Methods:**
Set a product's category.
Swift Objective-C
```Swift
func setCategory(_: String)
```
```Objective-C
- (void)setCategory:(nonnull NSString *)category
```
---
Set a product's URL.
Swift Objective-C
```Swift
func setURL(_: URL)
```
```Objective-C
- (void)setURL:(nonnull NSURL *)url
```
---
---
### VisitedScreenEvent
Represents a 'client visited screen' event.
This can be used for mobile screen usage tracking.
**Declared In:**
Headers/SNRVisitedScreenEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class VisitedScreenEvent: Event
```
```Objective-C
@interface SNRVisitedScreenEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label
```
---
Swift Objective-C
```Swift
init(label: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label andParams:(nullable SNRTrackerParams *)params
```
---
---
### HitTimerEvent
Represents a 'client hit timer' event.
This could be used for profiling or activity time monitoring - you can send a `HitTimerEvent` when a client starts doing something and send it once again when they finish, but this time with the different time signature. Then you can use our analytics engine to measure, for example, average activity time.
**Declared In:**
Headers/SNRHitTimerEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class HitTimerEvent: Event
```
```Objective-C
@interface SNRHitTimerEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label
```
---
Swift Objective-C
```Swift
init(label: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label andParams:(nullable SNRTrackerParams *)params
```
---
---
### SearchedEvent
Represents a 'client searched' event.
**Declared In:**
Headers/SNRSearchedEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class SearchedEvent: Event
```
```Objective-C
@interface SNRSearchedEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label
```
---
Swift Objective-C
```Swift
init(label: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label andParams:(nullable SNRTrackerParams *)params
```
---
---
### SharedEvent
Represents a 'client shared' event.
**Declared In:**
Headers/SNRSharedEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class SharedEvent: Event
```
```Objective-C
@interface SNRSharedEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label
```
---
Swift Objective-C
```Swift
init(label: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label andParams:(nullable SNRTrackerParams *)params
```
---
---
### AppearedInLocationEvent
Represents a 'client appeared in location' event.
**Declared In:**
Headers/SNRAppearedInLocationEvent.h
**Related To:**
[CCLocation](https://developer.apple.com/documentation/corelocation/cllocation)
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class AppearedInLocationEvent: Event
```
```Objective-C
@interface SNRAppearedInLocationEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String, location: CCLocation)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label andLocation:(nonnull CLLocation *)location
```
---
Swift Objective-C
```Swift
init(label: String, location: CCLocation, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label andLocation:(nonnull CLLocation *)location andParams:(nullable SNRTrackerParams *)params
```
---
---
### CrashEvent
Represents an 'application crashed' event.
**Declared In:**
Headers/SNRCrashEvent.h
**Related To:**
[TrackerParams](/developers/mobile-sdk/class-reference/ios/events#trackerparams)
[TrackerParamsBuilder](/developers/mobile-sdk/class-reference/ios/events#trackerparamsbuilder)
**Inherits From:**
[Event](/developers/mobile-sdk/class-reference/ios/events#event)
**Conforms To:**
[NSCopying](https://developer.apple.com/documentation/foundation/nscopying)
**Declaration:**
Swift Objective-C
```Swift
class CrashEvent: Event
```
```Objective-C
@interface SNRCrashEvent : SNREvent
```
**Initializers:**
Swift Objective-C
```Swift
init(label: String)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label
```
Swift Objective-C
```Swift
init(label: String, params: TrackerParams?)
```
```Objective-C
- (instancetype)initWithLabel:(nonnull NSString *)label andParams:(nullable SNRTrackerParams *)params
```
**Methods:**
This method sets the exception's `name` parameter.
Swift Objective-C
```Swift
func setExceptionName(_: String)
```
```Objective-C
- (void)setExceptionName:(nonnull NSString *)exceptionName
```
---
This method sets the exception's `reason` parameter.
Swift Objective-C
```Swift
func setExceptionReason(_: String)
```
```Objective-C
- (void)setExceptionReason:(nonnull NSString *)exceptionReason
```
---
This method sets the exception's `stacktrace` parameter.
Swift Objective-C
```Swift
func setExceptionStacktrace(_: String)
```
```Objective-C
- (void)setExceptionStacktrace:(nonnull NSString *)exceptionStacktrace
```