Swift中复制视图控制器的相关技术问题咨询

Hey there! Let's walk through each of your questions clearly since you're getting started with Swift modals and Storyboards—this stuff can feel tricky at first, but you're on the right track!

1. Does copying MP1 in Storyboard duplicate its associated code? Where to find those codes if so? #

• Short answer: No, copying the Storyboard view controller doesn't copy any of its linked Swift code. The interface elements in Storyboard are just visual representations; all IBOutlets, IBActions, and custom logic live in the .swift file tied to MP1.
• What to do next:
  • Create a new Swift file (e.g., MP2ViewController.swift) for your new modal.
  • Select MP2 in Storyboard, open the Identity Inspector (the third tab on the right sidebar, looks like a badge).
  • In the "Class" dropdown, select your new MP2ViewController class to link the interface to its code.
  • If you want MP2 to have the same functionality as MP1, copy the relevant code from MP1's file into MP2's file, then re-link any IBOutlets/IBActions by control-dragging from Storyboard elements to the new Swift file.

2. Will Swift treat MP2 as an independent reference? Will triggers for MP1 (like buttons) also trigger MP2? #

• Yes, MP2 will be a completely independent view controller once you link it to its own Swift class and set up separate presentation logic.
• Your existing MP1-triggering buttons won't accidentally launch MP2—those buttons are connected to code that specifically references MP1's view controller (either via segues or programmatic instantiation).
• To make a button trigger MP2 instead, you'll need to either:
  • Create a new segue from the button to MP2 in Storyboard, then make sure the segue's identifier is unique (and update any code that uses segues if needed).
  • If you're presenting modals programmatically, update the code to instantiate MP2ViewController instead of MP1ViewController.

3. I renamed MP2 in the left view controller list, but the Storyboard controller title still shows MP1. How to fix this? #

• There are two key places to update the name to avoid confusion:
  1. Visible Canvas Title: Select MP2 in Storyboard, open the Attributes Inspector (first tab on the right, looks like a slider). Find the "Title" field near the top and change it to "MP2"—this is what displays on the controller's top bar and in the Storyboard canvas.
  2. Storyboard ID (if used): Still in the Identity Inspector, check the "Storyboard ID" field. If MP1 had one, update this to a unique ID for MP2 (like "MP2ViewController")—this is critical if you're instantiating the controller programmatically using instantiateViewController(withIdentifier:).

内容的提问来源于stack exchange，提问作者ProfessorHelloKittyNr1