let scene = UIApplication.shared.connectedScenes.first let window = sd.window
} 这是在Swift中,我想把它转换成Objective-C。UIScene *scene = [[[[UIApplication sharedApplication]connectedScenes]allObjects]firstObject]; 但是现在没有Scen
我已经将ContentView.swift重命名为LandmarkDetail.swift,更新了contentView结构的名称,并用新的视图名称更新了'SceneDelegate.swift‘。LandmarkDetail_Previews: PreviewProvider { LandmarkDetail()}import U