> For the complete documentation index, see [llms.txt](https://doc.appflow.ai/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.appflow.ai/docs/sdk-set-up-instructions/ios-sdk/event-tracking-custom-events.md).

# Event tracking (Custom events)

Add custom events to track a better users' journey

***

### **First installation**

```swift
Appflow.shared.analytics.uploadBigDataWithType(eventType: .firstOpen, params: nil)
```

### **The App launched**

```swift
Appflow.shared.analytics.uploadBigDataWithType(eventType: .appStart, params: nil)
```

### **The App current uv**

```swift
Appflow.shared.analytics.uploadBigDataWithType(eventType: .screenView, params: [
    kScreenViewName: kHomepage
])
or
let model = ParamModel()
model.screenType = ParamScreenHome
Appflow.shared.analytics.uploadBigDataWithType(eventType: .screenView, paramModel: model)
```

### **Ads click**

```swift
Appflow.shared.analytics.uploadBigDataWithType(eventType: .adsClick, params: [
    kPlacement: kQuickClean,
    kFormat: kBanner
])
or 
let model = ParamModel()
model.placeType = ParamPlaceClean
model.formatType = ParamFormatBanner
Appflow.shared.analytics.uploadBigDataWithType(eventType: .adsClick, paramModel: model)
```

### **Ads show**

```swift
Appflow.shared.analytics.uploadBigDataWithType(eventType: .adsShow, params: [
    kPlacement: kQuickClean,
    kFormat: kBanner
])

let model = ParamModel()
model.placeType = ParamPlaceClean
model.formatType = ParamFormatBanner
Appflow.shared.analytics.uploadBigDataWithType(eventType: .adsShow, paramModel: model)
```

### **ev\_User\_Engagement**

```swift
let tMSimestamp = "\(IMDeviceInfoManager.shared().getCurrentMSimestamp())"
Appflow.shared.analytics.uploadBigDataWithType(eventType: .userEngagement, params: [
    kEngagementTimeMsec: tMSimestamp,
    kScreenViewName: kHomepage
])
or
let tMSimestamp = "\(IMDeviceInfoManager.shared().getCurrentMSimestamp())"
let model = ParamModel()
model.screenType = ParamScreenHome
model.otherData = [
    kEngagementTimeMsec: tMSimestamp
]
Appflow.shared.analytics.uploadBigData(eventType: .userEngagement, paramModel: model)
```

\*\*If you need a callback in the above method, do something like this

```swift
Appflow.shared.analytics.uploadBigDataWithType(eventType: .userEngagement, params: [
    kEngagementTimeMsec: tMSimestamp,
    kScreenViewName: kHomepage
], successBlock: { obj in

}) { obj in

}
```

\*\*If the above enumeration does not meet the requirements, extend it as follows

Swift

```swift
Appflow.shared.analytics.uploadBigDataWithEvent(
    eventName: "event_name",
    params: [
        "name": "123",
        "time": "456"
    ])
```

For now, we have limited the number of Custom events you can send to Appflow\.ai. The current limit is **10** custom events per app. To register them you need to go to Settings=> Apps=> Edit app=> Add custom events

<figure><img src="https://1902080327-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTUSTYqtR8RNNkx3qqWf9%2Fuploads%2Fb8gw3k5MBtDjrnKUlJFk%2Fimage.png?alt=media&amp;token=8f46e8e2-363a-4390-84b6-c9d3ac16b08f" alt=""><figcaption></figcaption></figure>


---

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