ios - Circular Progress Bar help, Swift Programming Language -



ios - Circular Progress Bar help, Swift Programming Language -

i'm trying create little circular progress bar in swift,

this have far

private var timer:cgfloat = 100; override func update(currenttime: cftimeinterval) { /* called before each frame rendered */ var startangle:cgfloat! var endangle:cgfloat! var circletimer:uibezierpath! startangle = cgfloat(m_pi * 1.5) endangle = startangle + cgfloat((m_pi * 2)) var progress:cgfloat = (endangle - startangle) * (timer / 100) + startangle circletimer.addarcwithcenter(cgpointmake(200, 200), radius: cgfloat(130), startangle: startangle, endangle: progress, clockwise: true) timer--; }

i error when run app

"bad_instruction (code=exc_i386_invop, subcode=0x0)"

on line

"circletimer.addarcwithcenter(cgpointmake(200, 200), radius: cgfloat(130), startangle: startangle, endangle: progress, clockwise: true)"

i'm new swift (programmed in other languages) , can't seem work out.

thanks luke

you have not initialized circletimer circletimer nil.you should initialize first call

circletimer.addarcwithcenter(cgpointmake(200, 200), radius: cgfloat(130), startangle: startangle, endangle: progress, clockwise: true)

intialize path

var circletimer:uibezierpath! = uibezierpath()

also write in draw rect

override func drawrect(rect: cgrect) { /* called before each frame rendered */ var startangle:cgfloat! var endangle:cgfloat! var circletimer:uibezierpath! = uibezierpath() startangle = cgfloat(m_pi * 1.5) endangle = startangle + cgfloat((m_pi * 2)) var progress:cgfloat = (endangle - startangle) * (timer / 100) + startangle //test working fine //circletimer.addarcwithcenter(cgpointmake(50, 50), radius: cgfloat(130), startangle: 0.0, endangle: progress, clockwise: true) circletimer.addarcwithcenter(cgpointmake(200, 200), radius: cgfloat(130), startangle: startangle, endangle: progress, clockwise: true) timer--; circletimer.linewidth = 20; uicolor.redcolor().setstroke() circletimer.stroke() }

ios iphone xcode swift xcode6

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