Swift Proxy and transmit value

First View Controller:

Import UIKit

Follow the agreement

Class Viewcontroller:uiviewcontroller,secondvcdelegate

{

Override Func Viewdidload () {

Super.viewdidload ()

Create a button

Let button1 = UIButton (Frame:cgrectmake (120, 120, 50, 50))

Modify Background color

Button1.backgroundcolor = Uicolor.redcolor ()

Self.view.addSubview (button1)

click Method

Button1.addtarget (Self, Action: "Buttonaction:", ForControlEvents:UIControlEvents.TouchUpInside)

}

button click Method

Func buttonaction (Sender:uibutton) {

Jump to the next interface

Let SECONDVC = Secondviewcontroller ()

Property pass-through value

Secondvc.passvalue = "Xiu"

Specify Proxy

Secondvc.delegate = Self

Define Block

Secondvc.block = {(Tempcolor:uicolor)->void in

Self.view.backgroundColor = Tempcolor

}

Self.navigationcontroller?. Pushviewcontroller (SECONDVC, Animated:true)

}

Implementing Proxy methods

Func ChangeColor (Tempcolor:uicolor) {

Self.view.backgroundColor = Tempcolor

}

Override Func didreceivememorywarning () {

Super.didreceivememorywarning ()

}

}

/*************************************************************/

The six steps of the agent

1. Post-page Development agreement

2. Previous page Proxy Compliance protocol

3. Post-page Setup agent properties

4. The previous page specifies the agent self

5. Post-page Send Agent method command

6. Previous page proxy implementation Proxy method

Second View Controller:

Import UIKit

Protocol Secondvcdelegate {

Methods in the Protocol

Func ChangeColor (Tempcolor:uicolor)

}

Class Secondviewcontroller:uiviewcontroller {

Property

var passvalue:string?

Agent Properties

var delegate:secondvcdelegate?

Block Property

var block: ((uicolor)->void)?

Override Func Viewdidload () {

Super.viewdidload ()

Self.view.backgroundColor = Uicolor.cyancolor ()

Print (self.passvalue!)

Self.title = Self.passvalue

Return button

Let button2 = UIButton (Frame:cgrectmake (120, 120, 50, 50))

Button2.backgroundcolor = Uicolor.blackcolor ()

Button2.addtarget (Self, Action: "Button2action:", ForControlEvents:UIControlEvents.TouchUpInside)

Self.view.addSubview (Button2)

}

Button2 click Method

Func button2action (Sender:uibutton) {

Send Agent Method command

Self.delegate?. ChangeColor (Uicolor.redcolor ())

Call Block

self.block! (Uicolor.redcolor ())

Return

Self.navigationcontroller?. Popviewcontrolleranimated (True)

}

Override Func didreceivememorywarning () {

Super.didreceivememorywarning ()

Dispose of any resources the can be recreated.

}

}

Swift Proxy and transmit value