//创建XDColorCircle的实例化对象
 XDColorCircle *circle=[[XDColorCircle alloc]initWithFrame:CGRectMake(0 ,100,self.view.frame.size.width,200)];
//添加到视图上展示
 [self.view addSubview:circle];

//先都写在这个构造方法里面吧
- (instancetype)initWithFrame:(CGRect)frame
{
  self = [super initWithFrame:frame];
  if (self) {
  }
  return self;
}

    self.backgroundColor=[UIColor clearColor];
    UIView *circleView=[[UIView alloc]init];
    circleView.frame=CGRectMake(0, 0,frame.size.width,frame.size.height);
    circleView.backgroundColor=[UIColor blueColor];
    [self addSubview: circleView];

    CAGradientLayer * gradientLayer = [CAGradientLayer layer];
    gradientLayer.colors = @[(__bridge id)[UIColor whiteColor].CGColor,(__bridge id)[UIColor cyanColor].CGColor];
    gradientLayer.locations = @[@0.2,@1.0];
    gradientLayer.startPoint = CGPointMake(0, 0);
    gradientLayer.endPoint = CGPointMake(1.0, 0);
    gradientLayer.frame =CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
    [circleView.layer insertSublayer:_gradientLayer atIndex:0];

    CAShapeLayer *layer=[[CAShapeLayer alloc]init];
    CGMutablePathRef pathRef=CGPathCreateMutable();
    CGPathAddRelativeArc(pathRef, nil,frame.size.width/2.0,frame.size.height/2.0,frame.size.width<frame.size.height?frame.size.width/2.0-5:frame.size.height/2.0-5,0, 2*M_PI);
    layer.path=pathRef;
    layer.lineWidth=5;
    layer.fillColor=[UIColor clearColor].CGColor;
    layer.strokeColor=[UIColor blackColor].CGColor;
    CGPathRelease(pathRef);
    circleView.layer.mask=layer;

    CABasicAnimation *animation=[CABasicAnimation     animationWithKeyPath:@"transform.rotation.z"]; ;
    // 设定动画选项
    animation.duration = 1;
    animation.removedOnCompletion = NO;
    animation.fillMode = kCAFillModeForwards;
    animation.repeatCount =HUGE_VALF;
    // 设定旋转角度
    animation.fromValue = [NSNumber numberWithFloat:0.0]; // 起始角度
    animation.toValue = [NSNumber numberWithFloat:2 * M_PI]; // 终止角度
    [circleView.layer addAnimation:animation forKey:@"rotate-layer"];

    UILabel *label=[[UILabel alloc]init];
    label.text=@"测试中";
    label.font=[UIFont systemFontOfSize:32];
    label.textAlignment=NSTextAlignmentCenter;
    label.frame=CGRectMake(0, 0,frame.size.width,frame.size.height);
    label.backgroundColor=[UIColor clearColor];
    [self addSubview:label];

//创建XDColorCircle的实例化对象
 XDColorCircle *circle=[[XDColorCircle alloc]initWithFrame:CGRectMake(0 ,100,self.view.frame.size.width,200)];
//添加到视图上展示
 [self.view addSubview:circle];