如何从图像中获取UI Bezier路径路径

Question

我已经实现了uiBezier路径实现来绘制绘画笔画，就像这样

{
        UIGraphicsBeginImageContext(self.tempDrawImage.bounds.size);

        for ( NSDictionary *dict in pathsArray )
        {
            UIBezierPath *p ;
            @try {
                p = (UIBezierPath*)[dict objectForKey:@"path"];
            }
            @catch (NSException *exception) {
                continue;
            }


            p.lineWidth = [[dict objectForKey:@"size"]floatValue];

                CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeCopy);
                [[UIColor colorWithRed:[[dict objectForKey:@"red"]floatValue]
                                 green:[[dict objectForKey:@"green"]floatValue]
                                  blue:[[dict objectForKey:@"blue"]floatValue]
                                 alpha:[[dict objectForKey:@"alpha"]floatValue]] setStroke];

            [p stroke];
        }

        [[UIColor colorWithRed:red green:green blue:blue alpha:opacity] setStroke];

        if(isEraser) //When eraser selected, change color as clear
        {
            CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeClear);
        }
        else
        {
            CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeCopy);
        }

            [bzierPath stroke];

        self.tempDrawImage.image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

}

但我需要获取Bezier路径或PathsArray- Dict格式 from the existing image 是否可能..？

我需要将它用作我的应用程序的一部分。

我为照片编辑做了一个应用程序，

在原始图像中制作绘画笔画，在此我维护了Undo Redi Stack，

完成涂漆后，然后做了删除/切割涂装的操作，然后做同样的事情..

所有这些操作都应该在撤消重做堆栈..