swift爬行篇 滑塊，進度條，步進，

滑塊

1. 建立

let sli: uislider = uislider(frame: cgrectmake(10.0, 270, 300, 5)) as uislider

sli.minimumvalue = 10
sli.maximumvalue = 300
sli.continuous = false

continous屬性為true：滑塊在滑動過程中響應事件，為false時則只在滑動後響應事件

2.設定各區域的

//滑塊左邊和右邊的檢視

sli.setminimumtrackimage(uiimage(named: "green.png"), forstate: uicontrolstate.normal)
sli.setminimumtrackimage(uiimage(named: "green.png"), forstate: uicontrolstate.normal)
//滑塊的檢視
"green.png"), forstate: uicontrolstate.normal)
//滑塊最大值和最小值處的
= uiimage(named: "green.png")
= uiimage(named: "green.png")

3.響應事件和tag

sli.addtarget(self, action: "progress", forcontrolevents: uicontrolevents.valuechanged)

sli.tag = 2

4. 獲取滑塊的值

let prog:uislider = self.view.viewwithtag(2) as! uislider

let a = prog.value

進度條

1建立

let progress: uiprogressview = uiprogressview(frame: cgrectmake(10, 300, 300, 3))

progress.progress = 0.0
progress.tag = 1

2.設定

let a = 50

aaa.setprogress(a/100, animated: false)

步進控制項

1.建立

let steppro: uistepper = uistepper(frame: cgrectmake(10, 310, 300, 5))

steppro.minimumvalue = 0
steppro.maximumvalue = 100
steppro.value = 0
steppro.stepvalue = 2.0

2.響應事件

steppro.addtarget(self, action: "stepeven:", forcontrolevents: uicontrolevents.touchdown)

steppro.continuous = true
steppro.tag = 255

continuous屬性uislider類似

3.獲取步進的值

let setp: uistepper = self.view.viewwithtag(255) as! uistepper

let a = setp.value
nslog("\(a)")

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