ios漸變圓環(huán)旋轉(zhuǎn)動畫cashapelayer cagradientlayer
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- (void)viewdidload { [super viewdidload]; // do any additional setup after loading the view, typically from a nib. calayer *layer = [calayer layer]; layer.backgroundcolor = [uicolor redcolor].cgcolor; //圓環(huán)底色 layer.frame = cgrectmake(100, 100, 110, 110); //創(chuàng)建一個圓環(huán) uibezierpath *bezierpath = [uibezierpath bezierpathwitharccenter:cgpointmake(55, 55) radius:50 startangle:0 endangle:m_pi*2 clockwise:yes]; //圓環(huán)遮罩 cashapelayer *shapelayer = [cashapelayer layer]; shapelayer.fillcolor = [uicolor clearcolor].cgcolor; shapelayer.strokecolor = [uicolor redcolor].cgcolor; shapelayer.linewidth = 5; shapelayer.strokestart = 0; shapelayer.strokeend = 0.8; shapelayer.linecap = @"round"; shapelayer.linedashphase = 0.8; shapelayer.path = bezierpath.cgpath; //顏色漸變 nsmutablearray *colors = [nsmutablearray arraywithobjects:(id)[uicolor redcolor].cgcolor,(id)[uicolor whitecolor].cgcolor, nil]; cagradientlayer *gradientlayer = [cagradientlayer layer]; gradientlayer.shadowpath = bezierpath.cgpath; gradientlayer.frame = cgrectmake(50, 50, 60, 60); gradientlayer.startpoint = cgpointmake(0, 1); gradientlayer.endpoint = cgpointmake(1, 0); [gradientlayer setcolors:[nsarray arraywitharray:colors]]; [layer addsublayer:gradientlayer]; //設(shè)置顏色漸變 [layer setmask:shapelayer]; //設(shè)置圓環(huán)遮罩 [self.view.layer addsublayer:layer]; //動畫 cabasicanimation *scaleanimation1 = [cabasicanimation animationwithkeypath:@"transform.scale"]; scaleanimation1.fromvalue = [nsnumber numberwithfloat:1.0]; scaleanimation1.tovalue = [nsnumber numberwithfloat:1.5]; scaleanimation1.autoreverses = yes;// scaleanimation1.fillmode = kcafillmodeforwards; scaleanimation1.duration = 0.8; cabasicanimation *rotationanimation2 = [cabasicanimation animationwithkeypath:@"transform.rotation.z"]; rotationanimation2.fromvalue = [nsnumber numberwithfloat:0]; rotationanimation2.tovalue = [nsnumber numberwithfloat:6.0*m_pi]; rotationanimation2.autoreverses = yes;// scaleanimation.fillmode = kcafillmodeforwards; rotationanimation2.repeatcount = maxfloat; rotationanimation2.begintime = 0.8; //延時執(zhí)行，注釋掉動畫會同時進行 rotationanimation2.duration = 2; //組合動畫 caanimationgroup *groupannimation = [caanimationgroup animation]; groupannimation.duration = 4; groupannimation.autoreverses = yes; groupannimation.animations = @[scaleanimation1, rotationanimation2]; groupannimation.repeatcount = maxfloat; [layer addanimation:groupannimation forkey:@"groupannimation"];}- (void)didreceivememorywarning { [super didreceivememorywarning]; // dispose of any resources that can be recreated.}@end |
關(guān)鍵的地方在于cabasicanimation對象的初始化方式中keypath的設(shè)定。在ios中有以下幾種不同的keypath，代表著不同的效果：
以上就是ios漸變圓環(huán)旋轉(zhuǎn)動畫 的資料整理，后續(xù)繼續(xù)補充相關(guān)資料，謝謝大家對本站的支持！
原文鏈接：http://www.jianshu.com/p/0887aa418a7d
