Delegate2015/12/30

Delegate ( )

Delegate ( )

Protocol ( )

Delegate

• A B

• A (what)

• B (how)

4

A Bwhat

•

5

• •

(code)

6

(code)

7

(code)

8

Protocol ( )

Spec ( )

• Hello

• return

10

return

(storyboard)

11

UITextFieldUIButton

UILabel

Hello + name

(code)• ViewController

UITextFieldDelegate textFieldShouldReturn

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UITextField

(result)

13

return

Protocol ( ) Delegate ( )

Delegate

• A B

• A (protocol, )

• B (class, )

15

A Bprotocol

•

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• ( ) • ( ) •

(code)

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(code)

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(code)

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• App

•

•

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21

(storyboard)

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UIButtonUILabel

(code)

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protocol

(code)

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class protocol delegate

!!

?

(code)

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delegate protocol

(code)

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Delegate ( )

• delegate ( ) protocol ( )

• protocol ( ) delegate ( )

• protocol ( ) (what)

• class ( ) (how)

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