003-multi-view controller switching

Multi-view controller switching 1. Container Concept

• An iOS app is rarely composed of only one viewcontroller, unless the app is extremely simple. When the app has multiple viewcontrollers, you need to manage these viewcontrollers.

• Container concept: displays one or more viewcontrollers and manages their lifecycles.

•? Some containers are also a viewcontroller, which is called a container by the container management controller? Controller (childviewcontroller ),? The container is called the parent controller (parentviewcontroller)

• A very small number of containers, such as uipopovercontroller, are inherited from nsobject. Note: uipopovercontroller can only be used on iPad?

2. Container features

• You can add, remove, or switch between childviewcontroller

• Instances that hold all childviewcontroller (typically in nsarray)

• In Charge Of the view of childviewcontroller? Call of Life Cycle Method

-Viewwillappear
-Viewdidappear
-Viewwilldisaapper

-Viewdiddisappear-rotation event

3. Several Common switching methods of the visual controller in IOS

1. tabbar Tab
-The uitabbarcontroller is used as the container to manage the sub-View Controller in parallel.

• 2. Push
-Is the container managed as a stack using uinavigationcontroller? Sub-View Controller

• 3. Modal Mode
-Modal window ?? Display the New View Controller. Before the New View Controller is disabled ,? User? Method to interact with other controllers

Modal window? Port features

• Is it used separately? Window used ?? Port, independent of container View Controller
• Normal? Used for explicit? Relatively independent display? Li's window ?? Port, for example :? User Login, response? Usage

Sequence setting or help information
•? The user closes the modal window ?? Cannot be connected to the upper port? Level 1 view? Row Interaction

  4. uitabbarcontroller, navigationcontroller

1. What is uitabbarcontroller? Use attributes

• Title: Title
• Image: Images
• Badgevalue: upper right? Corner icon
• Viewcontrollers: All? Sub-View Controller

• Note: When the tabbarcontroller is instantiated, all the subview controllers are loaded.

 

2. How uinavigationcontroller works

•? Principle: Manage in stack form? Sub-View Controller

• Uinavigationcontroller:

-Upper? The plane is uinavigationbar.

-Bottom? The plane is the view of the topviewcontroller. The navigationitem attribute of the topviewcontroller determines the uinavigationbar display? Content

In uinavigationcontroller? Use attributes and? Method

• Regular? Use attributes

1. Childviewcontrollers? Sub-View Controller

2. Title

3. Backbarbuttonitem return button

4. Left button of leftbarbuttonitem

5. Rightbarbuttonitem

   • Regular? Use? Method

   • -Will pushviewcontroller press the specified view controller? Top of the stack

   • -Popviewcontrolleranimated: pops up the current view controller from the stack.

  5. What about the segue object? Lifecycle

• Create? Target View Controller

• Create a segue object and call? Use its initwithidentifier: Source: Destination :? Method

• Mark? Is the identifier specified in interface builder? One mark? String. The other two parameters correspond to the start controller and the start controller of the arrow respectively? Target Controller

• Tune? Use the source View Controller's prepareforsegue: Sender :? Method call? Use the perform of the segue object? Method? Target View Controller pushes to the screen to release the segue object

PS: multi-view controller jump method summary

• Model
-Enable: presentviewcontroller: animated: Completion:-Disable: dismissviewcontrolleranimated: Completion:

• Push
-Enable: pushviewcontroller: animated:-Disable: popviewcontrolleranimated:

• Segue

-OK? Can it be used for modal? Used for push

-If yes ?? The Target Controller requires additional processing. You can use javasmseguewithidentifier: Sender :? Method