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iOS渐变圆环旋转动画CAShapeLayer CAGradientLayer

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ios渐变圆环旋转动画cashapelayer cagradientlayer 。

iOS渐变圆环旋转动画CAShapeLayer CAGradientLayer

shape.gif 。

iOS渐变圆环旋转动画CAShapeLayer CAGradientLayer

demo.png 。

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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; //圆环底色
  layer.frame = cgrectmake(100, 100, 110, 110);
 
 
  //创建一个圆环
  uibezierpath *bezierpath = [uibezierpath bezierpathwitharccenter:cgpointmake(55, 55) radius:50 startangle:0 endangle:m_pi*2 clockwise:yes];
 
  //圆环遮罩
  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;
 
  //颜色渐变
  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]; //设置颜色渐变
  [layer setmask:shapelayer]; //设置圆环遮罩
  [self.view.layer addsublayer:layer];
 
  //动画
  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; //延时执行,注释掉动画会同时进行
  rotationanimation2.duration = 2;
 
 
  //组合动画
  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

关键的地方在于cabasicanimation对象的初始化方式中keypath的设定。在ios中有以下几种不同的keypath,代表着不同的效果:

iOS渐变圆环旋转动画CAShapeLayer CAGradientLayer

以上就是ios渐变圆环旋转动画 的资料整理,后续继续补充相关资料,谢谢大家对本站的支持! 。

原文链接:http://www.jianshu.com/p/0887aa418a7d 。

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