iOS电商App布局咨询：滚动时顶部按钮显隐的初始方案

Hey there! Let's break down a solid initial layout setup for your e-commerce app that'll make it easy to implement that top button hide/show behavior when scrolling:

• Start with a UIViewController as your root controller (don't use a UITableViewController directly here—we need to add a fixed top view alongside the scrollable content)
• Add a dedicated UIView to the root VC's main view to hold your 3 top buttons. Set these constraints for this top container:
  • Pin top, leading, and trailing edges to the root view
  • Set a fixed height (e.g., 50pt, adjust based on your button size needs)
• Place your 3 UIButtons inside this top container view, then set constraints to arrange them horizontally (equal width with spacing, or custom positions depending on your design)
• Add a Container View to the root VC's main view, with these constraints:
  • Pin its top edge to the bottom of the top button container
  • Pin leading, trailing, and bottom edges to the root view
• Finally, embed a UITableViewController into this Container View: drag a UITableViewController onto your Storyboard, then hold Control and drag from the Container View to the UITableViewController, selecting the "embed" segue option.

This setup keeps your top buttons fixed to the screen at all times, while the table view's scrolling is isolated to the Container View below. Later on, you can easily hook into the table view's scroll events to toggle the top button container's visibility—no messy layout conflicts to worry about!

内容的提问来源于stack exchange，提问作者jrend