CALayer *bgLayer = [CALayer layer];

  bgLayer.frame = CGRectMake(kNumberMarkWidth / 2, self.numberMarkView.bottom + 10.f, self.width - kNumberMarkWidth / 2, kProcessHeight);

  bgLayer.backgroundColor = [UIColor colorWithHex:0xF5F5F5].CGColor;

  bgLayer.masksToBounds = YES;

  bgLayer.cornerRadius = kProcessHeight / 2;

  [self.layer addSublayer:bgLayer];

self.gradientLayer = [CAGradientLayer layer];
  self.gradientLayer.frame = bgLayer.frame;
  self.gradientLayer.masksToBounds = YES;
  self.gradientLayer.cornerRadius = kProcessHeight / 2;
　　// 设置渐变颜色数组
  [self.gradientLayer setColors:[NSArray arrayWithObjects:
                  (id)[[UIColor colorWithHex:0xFF6347] CGColor],
                  [(id)[UIColor colorWithHex:0xFFEC8B] CGColor],
                  (id)[[UIColor colorWithHex:0xEEEE00] CGColor],
                  (id)[[UIColor colorWithHex:0x7FFF00] CGColor],
                  nil]];
　　// 设置渐变位置数组
  [self.gradientLayer setLocations:@[@0.3, @0.5, @0.7, @1]];
　　// 设置渐变开始和结束位置
  [self.gradientLayer setStartPoint:CGPointMake(0, 0)];
  [self.gradientLayer setEndPoint:CGPointMake(1, 0)];

　self.maskLayer = [CALayer layer];
   self.maskLayer.frame = CGRectMake(0, 0, (self.width - kNumberMarkWidth / 2) * self.percent / 100.f, kProcessHeight);
  [self.gradientLayer setMask:self.maskLayer];

- (void)circleAnimation { // 进度条动画
  
  [CATransaction begin];
  [CATransaction setDisableActions:NO];
  [CATransaction setAnimationTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
  [CATransaction setAnimationDuration:kAnimationTime];
  self.maskLayer.frame = CGRectMake(0, 0, (self.width - kNumberMarkWidth / 2) * _percent / 100.f, kProcessHeight);
  [CATransaction commit];
}

- (void)setNUmberMarkLayer { // 提示文字设置渐变色
  
  CAGradientLayer *numberGradientLayer = [CAGradientLayer layer];
  numberGradientLayer.frame = CGRectMake(0, kTopSpaces, self.width, kNumberMarkHeight);
  [numberGradientLayer setColors:self.colorArray];
  [numberGradientLayer setLocations:self.colorLocationArray];
  [numberGradientLayer setStartPoint:CGPointMake(0, 0)];
  [numberGradientLayer setEndPoint:CGPointMake(1, 0)];
  [self.layer addSublayer:numberGradientLayer];
  [numberGradientLayer setMask:self.numberMark.layer];
  self.numberMark.frame = numberGradientLayer.bounds;
}

UIView *backgroundView = [[UIView alloc] init];
  backgroundView.frame = self.view.bounds;
  backgroundView.backgroundColor = [UIColor colorWithWhite:0 alpha:0.7];
  [self.view addSubview:backgroundView];
  // 创建一个全屏大的path
  UIBezierPath *path = [UIBezierPath bezierPathWithRect:self.view.bounds];
  // 创建一个圆形path
  UIBezierPath *circlePath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(self.view.center.x, self.view.center.y - 25)
                               radius:50
                             startAngle:0
                              endAngle:2 * M_PI
                              clockwise:NO];
  [path appendPath:circlePath];
  
  CAShapeLayer *shapeLayer = [CAShapeLayer layer];
  shapeLayer.path = path.CGPath;
  backgroundView.layer.mask = shapeLayer;