Animation along the besell Curve

Animation along the besell Curve

As follows:

Source code:

//// Rootviewcontroller. M /// copyright (c) 2014 y. x. all rights reserved. // # import "rootviewcontroller. H "# import" yxgcd. H "@ interface rootviewcontroller () @ property (nonatomic, strong) gcdtimer * timer; @ end @ implementation rootviewcontroller-(void) viewdidload {[Super viewdidload]; cashapelayer * shapelayer = [cashapelayer layer]; shapelayer. path = [self bezierpath]. cgpath; shapelayer. fillcolor = [uicolor clearcolor]. cgcolor; shapelayer. strokecolor = [uicolor redcolor]. cgcolor; [self. view. layer addsublayer: shapelayer]; cgfloat max = 0.7f; cgfloat Gap = 0.1f; _ timer = [[gcdtimer alloc] initinqueue: [gcdqueue mainqueue]; [_ timer event: ^ {cabasicanimation * anistart = [cabasicanimation animationwithkeypath: @ "strokestart"]; anistart. fromvalue = [nsnumber numberwithfloat: 0.f]; anistart. tovalue = [nsnumber numberwithfloat: Max]; anistart. duration = 10.f; cabasicanimation * aniend = [cabasicanimation animationwithkeypath: @ "strokeend"]; aniend. fromvalue = [nsnumber numberwithfloat: 0.f + Gap]; aniend. tovalue = [nsnumber numberwithfloat: MAX + Gap]; aniend. duration = 10.f; caanimationgroup * Group = [caanimationgroup animation]; group. duration = 10.f; group. animations = @ [aniend, anistart]; shapelayer. strokestart = max; shapelayer. strokeend = MAX + gap; [shapelayer addanimation: group forkey: Nil];} timeinterval: nsec_per_sec * 11]; [_ timer start];}-(uibezierpath *) bezierpath {Pipeline * bezierpath = [describezierpath]; [bezierpath movetopoint: cgpointmake (0,153)]; [bezierpath addcurvetopoint: cgpointmake (7.15, 68.33) controlpoint1: cgpointmake (0,153) controlpoint2: cgpointmake (3.87, 81.7)]; [bezierpath addcurvetopoint: cgpointmake (25.04, 19.69) controlpoint1: cgpointmake (12.37, 47.12) controlpoint2: cgpointmake (18.32, 30.36)]; [bezierpath addcurvetopoint: cgpointmake (52.34, 11.11) controlpoint1: cgpointmake (33.25, 6.65) controlpoint2: cgpointmake (42.42, 3.15)]; [bezierpath addcurvetopoint: cgpointmake (66.37, 35.65) controlpoint1: cgpointmake (59.1, 16.55) controlpoint2: cgpointmake (63.57, 24.69)]; [bezierpath addcurvetopoint: cgpointmake (70.44, 68.48) controlpoint1: cgpointmake (68.59, 44.35) controlpoint2: cgpointmake (69.67, 53.94)]; [bezierpath addcurvetopoint: cgpointmake (70.82, 76.33) controlpoint1: cgpointmake (70.55, 70.64) controlpoint2: cgpointmake (70.62, 72.11)]; [bezierpath addcurvetopoint: cgpointmake (78.01, 120.77) controlpoint1: cgpointmake (72.01, 101.67) controlpoint2: cgpointmake (73.36, 111.89)]; [bezierpath addcurvetopoint: cgpointmake (113.44, 130.02) controlpoint1: cgpointmake (84.01, 132.24) controlpoint2: cgpointmake (94.99, 135.64)]; [bezierpath addcurvetopoint: cgpointmake (160.6, 80.19) controlpoint1: cgpointmake (136.37, 123.04) controlpoint2: cgpointmake (150.08, 106.8)]; [bezierpath addcurvetopoint: cgpointmake (165.62, 66.27) controlpoint1: cgpointmake (162.24, 76.04) controlpoint2: cgpointmake (163.77, 71.76)]; [bezierpath addcurvetopoint: cgpointmake (170.01, 53.2) controlpoint1: cgpointmake (165.71, 66) controlpoint2: cgpointmake (169.06, 55.92)]; [bezierpath addcurvetopoint: cgpointmake (183.09, 29.29) controlpoint1: cgpointmake (174.54, 40.1) controlpoint2: cgpointmake (178.09, 33.17)]; [bezierpath addcurvetopoint: cgpointmake (207.73, 32.08) controlpoint1: cgpointmake (189.16, 24.57) controlpoint2: cgpointmake (196.99, 25.3)]; [bezierpath addcurvetopoint: cgpointmake (231.82, 80.54) controlpoint1: cgpointmake (224.41, 42.62) controlpoint2: cgpointmake (230.78, 57.67)]; [bezierpath addcurvetopoint: cgpointmake (231.98, 95.87) controlpoint1: cgpointmake (232.01, 84.84) controlpoint2: cgpointmake (232.03, 88.32)]; [bezierpath addcurvetopoint: cgpointmake (235.32, 127.15) controlpoint1: cgpointmake (231.86, 113.33) controlpoint2: cgpointmake (232.39, 120.2)]; [bezierpath addcurvetopoint: cgpointmake (259.98, 142) controlpoint1: cgpointmake (239.09, 136.1) controlpoint2: cgpointmake (246.69, 141.02)]; [bezierpath addcurvetopoint: cgpointmake (285.24, 127.17) controlpoint1: cgpointmake (272.35, 142.91) controlpoint2: cgpointmake (280.44, 137.75)]; [bezierpath addcurvetopoint: cgpointmake (291.02, 90.5) controlpoint1: cgpointmake (289.16, 118.51) controlpoint2: cgpointmake (290.78, 106.84)]; [bezierpath addcurvetopoint: cgpointmake (290.96, 74.58) controlpoint1: cgpointmake (291.09, 86.01) controlpoint2: cgpointmake (291.07, 82.22)]; [bezierpath addcurvetopoint: cgpointmake (292.11, 46.27) controlpoint1: cgpointmake (290.74, 57.91) controlpoint2: cgpointmake (290.89, 51.9)]; [bezierpath addcurvetopoint: cgpointmake (303.56, 39.05) controlpoint1: cgpointmake (293.74, 38.8) controlpoint2: cgpointmake (297.35, 36.18)]; [bezierpath addcurvetopoint: cgpointmake (320.2, 88.6) controlpoint1: cgpointmake (315.78, 44.7) controlpoint2: cgpointmake (320.73, 62.49)]; [bezierpath addcurvetopoint: cgpointmake (320,153) controlpoint1: cgpointmake (319.99, 99.31) controlpoint2: cgpointmake (320,153)]; [bezierpath addlinetopoint: cgpointmake (0,153)]; [bezierpath closepath]; return bezierpath;} @ end

You need to set the time to be consistent :)