firebase-ios-sdk/FirebaseInAppMessaging/Sources/DefaultUI/FIRIAMRenderingWindowHelper.h

/*
 * Copyright 2018 Google
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN
/**
 * To avoid the risk of hijacking the app's existing view transition flow, we render in-app message
 * views in a top level UI Window instead of presenting from app's existing UIWindow. The caller is
 * supposed to set the rootViewController to be the appropriate view controller for the in-app
 * message and call setHidden:NO to make it really visible.
 */
@interface FIRIAMRenderingWindowHelper : NSObject

// Return the singleton UIWindow that can be used for rendering modal IAM views
+ (UIWindow *)UIWindowForModalView;

// Return the singleton UIWindow that can be used for rendering banner IAM views
+ (UIWindow *)UIWindowForBannerView;

// Return the singleton UIWindow that can be used for rendering banner IAM views
+ (UIWindow *)UIWindowForImageOnlyView;
@end
NS_ASSUME_NONNULL_END