iphone - 为什么要使用模态视图

Question

这个问题一直困扰着我。为什么人们有时将 View Controller 呈现为模态视图 Controller ？你不能总是把 View Controller 推到导航 Controller 上然后再弹出吗？它似乎更加直接和一致。我见过人们交替使用这两者，结果让我抓狂。

是否有任何特定情况下最好将 View Controller 呈现为模态视图 Controller ？

Answer 1

苹果View Controller Programming Guide很好地描述了它的用途。

Modal view controllers provide interesting ways to manage the flow of your application. Most commonly, applications use modal view controllers as a temporary interruption in order to obtain key information from the user.

和

There are several reasons to use modal view controllers in your application:

• Use them to gather information from the user immediately.
• Use them to present some content temporarily.
• Use them to change work modes temporarily.
• Use them to implement alternate interfaces for different device orientations.
• Use them to present a new view hierarchy with a specific type of animated transition (or no transition).