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feat: delay the launch event until the app becomes active #9906

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feat: delay the launch event until the app becomes active #9906

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9a81cd7
feat: delay the launch event until the app becomes active
edusperoni May 11, 2022
d9261b5
Merge branch 'main' into feat/delay-ios-launch
edusperoni Mar 12, 2026
cab0b20
feat(iOSApplication): add shouldDelayLaunchEvent flag to control laun…
edusperoni Mar 12, 2026
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6 changes: 6 additions & 0 deletions packages/core/application/application.d.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -265,6 +265,12 @@ export class iOSApplication extends ApplicationCommon {
* Get the current one or set a custom one.
*/
sceneDelegate: UIWindowSceneDelegate;

/**
* Flag to be set when the launch event should be delayed until the application has become active.
* This is useful when you want to process notifications or data in the background without creating the UI.
*/
shouldDelayLaunchEvent: boolean;
}

export const VALID_FONT_SCALES: number[];
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15 changes: 13 additions & 2 deletions packages/core/application/application.ios.ts
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Expand Up @@ -9,6 +9,7 @@ import { ios as iosUtils, dataSerialize } from '../utils/native-helper';
import { ApplicationCommon, initializeSdkVersionClass, SceneEvents } from './application-common';
import { ApplicationEventData, SceneEventData } from './application-interfaces';
import { Observable } from '../data/observable';
import type { iOSApplication as IiOSApplication } from './application';
import { Trace } from '../trace';
import {
AccessibilityServiceEnabledPropName,
Expand Down Expand Up @@ -254,10 +255,11 @@ class SceneDelegate extends UIResponder implements UIWindowSceneDelegate {
// ensure available globally
global.SceneDelegate = SceneDelegate;

export class iOSApplication extends ApplicationCommon {
export class iOSApplication extends ApplicationCommon implements IiOSApplication {
private _delegate: UIApplicationDelegate;
private _delegateHandlers = new Map<string, Array<Function>>();
private _rootView: View;
private launchEventCalled = false;
private _sceneDelegate: UIWindowSceneDelegate;
private _windowSceneMap = new Map<UIScene, UIWindow>();
private _primaryScene: UIWindowScene | null = null;
Expand All @@ -269,6 +271,8 @@ export class iOSApplication extends ApplicationCommon {
displayedLinkTarget: CADisplayLinkTarget;
displayedLink: CADisplayLink;

shouldDelayLaunchEvent = false;

/**
* @internal - should not be constructed by the user.
*/
Expand Down Expand Up @@ -583,6 +587,7 @@ export class iOSApplication extends ApplicationCommon {
}

private notifyAppStarted(notification?: NSNotification) {
this.launchEventCalled = true;
const root = this.notifyLaunch({
ios: notification?.userInfo?.objectForKey('UIApplicationLaunchOptionsLocalNotificationKey') ?? null,
});
Expand Down Expand Up @@ -691,14 +696,20 @@ export class iOSApplication extends ApplicationCommon {
this.window.backgroundColor = SDK_VERSION <= 12 || !UIColor.systemBackgroundColor ? UIColor.whiteColor : UIColor.systemBackgroundColor;
}

this.notifyAppStarted(notification);
this.launchEventCalled = false;
if (!this.shouldDelayLaunchEvent) {
this.notifyAppStarted();
}
} else {
// Scene-based app - window creation will happen in scene delegate
}
}

@profile
private didBecomeActive(notification: NSNotification) {
if (!this.launchEventCalled) {
this.notifyAppStarted(notification);
}
const additionalData = {
ios: UIApplication.sharedApplication,
};
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