Summarizing UI Creation
You’ve learned a lot in this chapter, so let’s end with a summary.
Apps are made of message handlers.
iOS sends messages to your app when significant events happen or are about to happen.
iOS also sends messages to your app when it needs data or to ask if your app supports a feature, such as screen rotation.
Objects in your app can message iOS to ask for objects, data, or services.
Objects in your app can message each other and themselves.
An app UI is made of visible objects that generate messages when the user interacts with them.
For each screen in the UI, a view controller manages UI content and most of the user interaction, while visible UI content is made of views, subviews, and controls and saved in a nib file.
A technology called MVC is used to minimize ...
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