Mobile Table View Timer App

Implement a single-screen mobile application in Xcode that displays a table view populated with fifty timer rows.

Each row behaves as an independent timer. While a cell is on screen, its timer should increment every 0.1 seconds. When the user taps a cell, that cell’s timer should pause or stop. As soon as a cell scrolls out of view, its timer must stop. When the same cell scrolls back into view, its timer should become active again.

In one variation of this task, a pull-down gesture starts a brand-new timer and stops the previously running timer. Tapping a row in this variation stops that specific row’s timer.

If time allows, improve the implementation for better performance or reliability.

Additional detail: Every cell contains a red dot.

Requirements

• Build a one-page app in Xcode.
• Use a table view.
• Include 50 timer rows.
• Visible cells automatically count every 0.1 seconds.
• Tapping a cell pauses or stops that cell's timer.
• A cell's timer stops when the cell leaves the visible area.
• A cell's timer activates or reactivates when the cell enters the visible area.
• Pulling down starts a new timer and stops the old timer (in the pull-down variant).
• If time permits, optimize the implementation.

Additional Part

• Each cell has a red dot.