//添加坐标的坐标点UIBezierPath * pathtemp=[[UIBezierPath alloc] init];[pathtemp moveToPoint:CGPointMake(10, 100)];[pathtemp addLineToPoint:CGPointMake(50, 90)];[pathtemp addLineToPoint:CGPointMake(100, 50)];[pathtemp addLineToPoint:CGPointMake(150, 80)];[pathtemp addLineToPoint:CGPointMake(200, 70)];[pathtemp addLineToPoint:CGPointMake(250, 60)];[pathtemp addLineToPoint:CGPointMake(300, 50)];[pathtemp addLineToPoint:CGPointMake(350, 100)];//把折线绘制到界面CAShapeLayer *arctemp = [CAShapeLayer layer];arctemp.path =pathtemp.CGPath;  //path->CGPath;arctemp.strokeColor = [UIColor purpleColor].CGColor;arctemp.lineWidth = 8;[self.view.layer addSublayer:arctemp];//绘制线条的动画CABasicAnimation *drawAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];drawAnimation.duration            = 5.0;drawAnimation.repeatCount         = 1.0;drawAnimation.removedOnCompletion = NO;drawAnimation.fromValue = [NSNumber numberWithFloat:0.0f];drawAnimation.toValue   = [NSNumber numberWithFloat:10.0f];drawAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];[arctemp addAnimation:drawAnimation forKey:@"drawCircleAnimation"];//===================================================================================================================//绘制渐变色层CAGradientLayer *gradientLayer = [CAGradientLayer layer];gradientLayer.frame =CGRectMake(0, 0, 500, 400) ;// self.view.frame;gradientLayer.colors = @[(__bridge id)[UIColor colorWithRed:249.0/255.0 green:127.0/255.0 blue:127.0/255.0 alpha:1].CGColor ,(__bridge id)[UIColor colorWithRed:250.0/255.0 green:150.0/255.0 blue:150.0/255.0 alpha:1].CGColor,(__bridge id)[UIColor yellowColor].CGColor];gradientLayer.locations=@[@0.0,@0.2,@1.0];gradientLayer.startPoint = CGPointMake(0.5,0.5);gradientLayer.endPoint = CGPointMake(0.5,1);[self.view.layer addSublayer:gradientLayer];//加上渐变层//============第一种方式添加路径->这个是绘制渐变需要的UIBezierPath * path=[[UIBezierPath alloc] init];[path moveToPoint:CGPointMake(10, 100)];[path addLineToPoint:CGPointMake(10, 300)];[path addLineToPoint:CGPointMake(350, 300)];[path addLineToPoint:CGPointMake(350, 100)];[path addLineToPoint:CGPointMake(300, 50)];[path addLineToPoint:CGPointMake(250, 60)];[path addLineToPoint:CGPointMake(200, 70)];[path addLineToPoint:CGPointMake(150, 80)];[path addLineToPoint:CGPointMake(100, 50)];[path addLineToPoint:CGPointMake(50, 90)];[path closePath];//============第二种方式添加路径
//  UIBezierPath* path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(10,10,100,100)];//============第三种方式添加path路径
//    CGMutablePathRef path = CGPathCreateMutable();
//
//    CGPathAddRect(path, nil, CGRectInset(self.view.bounds, 20, 120));
    CAShapeLayer *arc = [CAShapeLayer layer];arc.path =path.CGPath;arc.fillColor = [UIColor yellowColor].CGColor;arc.strokeColor = [UIColor yellowColor].CGColor;arc.lineWidth = 1;gradientLayer.mask=arc;