CGPoint fromPoint = self.imageView.center;

    

    //路径曲线

    UIBezierPath *movePath = [UIBezierPath bezierPath];

    [movePath moveToPoint:fromPoint];

    CGPoint toPoint = CGPointMake(300, 460);

    [movePath addQuadCurveToPoint:toPoint

                     controlPoint:CGPointMake(280,0)];

    //关键帧

    CAKeyframeAnimation *moveAnim = [CAKeyframeAnimation animationWithKeyPath:@"position"];

    moveAnim.path = movePath.CGPath;

    moveAnim.removedOnCompletion = YES;

    [self.imageView.layer addAnimation:moveAnim forKey:nil];