transform.rotation：旋轉動畫。transform.rotation.x：按x軸旋轉動畫。
transform.rotation.y：按y軸旋轉動畫。
transform.rotation.z：按z軸旋轉動畫。
transform.scale：按比例放大縮小動畫。
transform.scale.x：在x軸按比例放大縮小動畫。
transform.scale.y：在y軸按比例放大縮小動畫。
transform.scale.z：在z軸按比例放大縮小動畫。
position：移動位置動畫。
opacity：透明度動畫
strokeend :顏色從無到有
strokestart :顏色從有到無
// do any additional setup after loading the view, typically from a nib.// （360°- 30°） ->（180°+30°） 逆時針的圓弧 cd圓弧
uibezierpath *path1 = [uibezierpath bezierpathwitharccenter:cgpointmake(self.view.center.x,self.view.center.y)
radius:100
startangle:2 * m_pi - degrees_to_radians(30)
endangle:m_pi + degrees_to_radians(30)
clockwise:no];
// （3/2π- 60°） ->（-1/2π -60°） 逆時針的圓 dd′圓
uibezierpath *path2 = [uibezierpath bezierpathwitharccenter:cgpointmake(self.view.center.x,self.view.center.y)
radius:100
startangle:m_pi *3/2 - (m_pi_2 - degrees_to_radians(30))
endangle:-m_pi_2 - (m_pi_2 -degrees_to_radians(30))
clockwise:no];
cashapelayer *layer = [cashapelayer layer];
layer.path = path1.cgpath;
layer.strokecolor = [uicolor redcolor].cgcolor;
layer.fillcolor = [uicolor clearcolor].cgcolor;
layer.linewidth = 5;
cashapelayer *layer1 = [cashapelayer layer];
layer1.path = path2.cgpath;
layer1.strokecolor = [uicolor yellowcolor].cgcolor;
layer1.fillcolor = [uicolor clearcolor].cgcolor;
layer1.linewidth = 5;
//方案1
cakeyframeanimation *startanimation = [cakeyframeanimation animationwithkeypath:@"strokestart"];
startanimation.values = @[@0,@1];
startanimation.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseout];
startanimation.duration = 2 ;
startanimation.repeatcount = 100;
startanimation.delegate = self;
startanimation.removedoncompletion = 1;
cakeyframeanimation *endanimation = [cakeyframeanimation animationwithkeypath:@"strokeend"];
endanimation.values = @[@0,@1];
endanimation.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseout];
endanimation.duration = 2;
endanimation.repeatcount = 100;
endanimation.delegate = self;
endanimation.removedoncompletion = 1;
caanimationgroup *animationgroup = [caanimationgroup animation];
animationgroup.animations = [nsarray arraywithobjects:startanimation,nil];
animationgroup.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseout];
animationgroup.duration = 3;
animationgroup.repeatcount = 100;
animationgroup.delegate = self;
animationgroup.removedoncompletion = 1;
[animationgroup setvalue:@"animationstep3" forkey:@"animationname"];
[layer addanimation:startanimation forkey:nil];
[layer1 addanimation:endanimation forkey:nil];
[self.view.layer addsublayer:layer];
[self.view.layer addsublayer:layer1];
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