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ShoheOhtani
ShoheOhtani

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[Swift/SwiftUI] How to fix "Attempt to present which is already presenting"

When you implement present ViewController like Modal, some of case you'd see "Attempt to present which is already presenting".

Before code

uiView.window?.rootViewController?.present(viewController, animated: true)
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Error log

[Presentation] Attempt to present <UIViewController: 0x10c72d050> on <_TtGC7SwiftUI19UIHostingControllerGVS_15ModifiedContentVS_7AnyViewVS_12RootModifier__: 0x10c60ab30> (from <_TtGC7SwiftUI19UIHostingControllerGVS_15ModifiedContentVS_7AnyViewVS_12RootModifier__: 0x10c60ab30>) which is already presenting <UIViewController: 0x1201f72b0>.
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After code

guard let rootViewController = 
uiView.window?.rootViewController else { return }
if rootViewController.presentedViewController == nil {
    rootViewController.present(viewController, animated: true)
}
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