Apple's split-screen operation needs to drag and drop the split-screen APP into the Dock at the bottom of the screen, open the first APP, then gently slide up from the bottom of the screen to bring up the Dock, and finally bring up the second APP to be opened from the Dock, drag it to the right to form a left-right split screen, and drag it to the middle to form a floating screen. When you want to remove the suspended screen window, just slide your finger gently to the edge.

The main screen of iPhone is based on the graphical user interface, and the available applications are displayed in the graphical list, usually only one program is run at a time. Starting from the iPhone4, the original version of multitasking began to work. Users can press the Home button twice to select the application they use, but no application can run in the background. Since iOS7, applications can really multitask, each application can run in the background when not in use, and most functions can be used at the same time when talking or listening to music. You can close the application you are using at any time by pressing the Hardware Home button.