1. The default startup screen is actually the three o'clock clock image, and we need to reselect the Splash Image in the application UI module in the package. appxmanifest file.
The image size is 620*300, or 868x420 (1.4 times), 1116x540 (1.8 times), and supports PNG.
The startup screen is displayed when the application is re-activated.
2. If you want to delay the display time of the startup screen, you have to add a page to simulate the startup screen after the screen is displayed, but the page will flash when the two screens are connected.
Here is a story to teach you how to avoid this ugly flash, but I don't fully understand it. I hope my friends in the garden can translate it.
If you use fragment loading to load your imitation splash screen page, you may notice a flicker between when the Windows splash screen is dismissed and when your page is displayed. you see this flicker because fragment loading begins to load your imitation splash screen page asynchronously, beforeActivatedEvent Handler finishes executing. you can avoid this unsightly flicker entirely by avoiding the use of fragment loading in your imitation splash screen page. when your additional loading tasks are complete (as demonstrated by the splash screen sample) You can then navigate to your app's main page. alternatively, if you wish to continue the use of fragment loading in your imitation splash screen page, you can also prevent the flicker by getting a deferral and respondingActivatedEvents asynchronously. Get a deferral for an activated event by callingActivatedoperation.GetdeferralMethod.
Note: Do not use the startup screen to display advertisements, or use the startup screen as an about page.