ios 贝塞尔动画
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];