PlayView | 一个仿有道词典播放音乐的控件

I have HomeView which contains the TabView (which is inside a NavigationView, see the code below). If I am to load the HomeView from another view (LoginView) it loads as expected and everything works. If I try to load the HomeView directly like this (code is in my ContentView):

I have a simple app that is intended to work like this:

• App loads with a default image
• Once a tap is received a random image is loaded from list
• If no tap is received for 5 seconds we reset back to default image

I'm attempting to accomplish this using DispatchQueue and DispatchWorkItem. I have managed to get the above functionality working - except when a user is tapping multiple times.

I'm assuming this is because we are initiating the "resetToOff" DispatchWorkItem each time we tap without resetting the 5 seconds.

How do I reset the image back to the default image if there is no touch received for 5 seconds while resetting the DispatchQueue?

Here is what I have so far:

How do you properly send data to a custom data NSObject class for a collection view? My variables are always returning as nil.

I have a splash screen in it's own view Controller. When all the data I want loaded has finished loading from firebase, I go to the main screen of the app via performSegue(withIdentifier:), here's the code for the code in question from the SplashScreenViewController:

I have no idea why this is happening, I had a different Xcode project with this exact same collection view just to test things out and make it and I've finished making it and it works very well in that project. Then I moved all the code and items over to my main Xcode project and the collection view just isn't showing in my view controller when I play the app.

How do you debug collection views? The two: playerCollect?.cellForItem(at: path) and playerCollect.indexPathForItem(at: p) both return nil if that's an issue? I don't know. I might've not connected everything back together once I moved it over to my main project, but yet again how would you find that out? Here's my full code for the viewController containing the UICollectionView:

I have a collection view that shows a group of videos of whatever data object I pass it. When you press on one of the videos in the content view then a new view (DetailViewController) get's presented and the video gets shown in a more detailed view. In that DetailViewController there's a back button that dismisses the view and puts you back to the main page with the collection view - which is when the crash happens, when I go from that 'DetailViewController' back the main view controller.

Everything works perfectly when the collection view's 'scroll direction' is set to vertical, but when I set it to horizontal (which is what I want), it crashes like explained above.

The crash is:

Unexpectedly found nil while unwrapping an Optional value

and the source is:

The main view of my app is a list of songs.

The purpose of application is to play some radio stations via url streaming using exoplayer. The problem encountered is that when the app is running and the notification starts there are 2 different streams playing one by my button press from the radio UI and one by the notification.

My question is how can I make it so when I press a button on the UI it changes the the stream on the notification player as well.

P.S. I have tried importing one player however that proved from mainactivity.java by calling it a static however that causes a memory leak and the stream stop in the foreground service.

I used the notificationPlayerManager(exoplayer) from here: https://www.youtube.com/watch?v=svdq1BWl4r8

Main Activity class:

package-----------etc

I have this weird white border at the bottom of my screen. It's on the bottom left corner, which is the TimeView.java

This is my ContentPane.java

I have 3 views, playView, gameView and timeView.

gameView is the top left block. timeView is the bottom left block and playView is the right block.

This is a photo of the program I need to remake.

How should I stack those two views on top of each other. And then the other view on the right of those two.

As you can see the bottom left block is a bit bigger than the top left block.

I've tried using GridLayout and BoxLayout but none of those seem to work.

This is what I've tried. It does work but the size is the same of the two left blocks.