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29 lines
767 B
Objective-C
29 lines
767 B
Objective-C
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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#import <UIKit/UIKit.h>
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NS_ASSUME_NONNULL_BEGIN
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// Any view controller which wants to be able cancel back button
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// presses and back gestures should implement this protocol.
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@protocol OWSNavigationView <NSObject>
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// shouldCancelNavigationBack will be called if the back button was pressed or
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// if a back gesture was performed but not if the view is popped programmatically.
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- (BOOL)shouldCancelNavigationBack;
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@end
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#pragma mark -
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// This navigation controller subclass should be used anywhere we might
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// want to cancel back button presses or back gestures due to, for example,
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// unsaved changes.
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@interface OWSNavigationController : UINavigationController
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@end
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NS_ASSUME_NONNULL_END
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