在NSMutableArray和Sqlite中存储CGPoints(Storing CGPoints in NSMutableArray and Sqlite)

 每当touchesMoved被调用时，我都希望存储这些点。 到目前为止一切工作正常。 但是我想要做的是每次触摸移动被调用时创建一个“新”数组。 例如，一旦触摸结束，点数组将被保存到标识符为1的数据库中。下次调用touchesMoved时，数组将被清空，并用具有不同标识符的另一组点替换。 每次调用时，我都会尝试在touchesEnded中增加一个整数，但我发现每次触摸结束时整数都会保持不变。 那么我将如何做到这一点？ 任何帮助将非常感激。 
 
 更新：例如，我在我的数组中记录了这些点： 
 
100.000, 200.000
100.000, 202.000
100.000, 204.000
 
 这些点将用一个标识符保存在数据库中，比方说1。 
 
1 | 100.000 | 200.000
1 | 100.000 | 202.000
1 | 100.000 | 204.000
 
 现在，当触摸移动并再次结束时，新的一组记录点将以不同的标识符保存，比如2。 
 
2 | 200.000 | 300.000
2 | 200.000 | 302.000
2 | 200.000 | 304.000
 
 所以基本上我想要发生的是每次touchesMoved被调用时，它都会记录将被保存在数组中的点。 当触摸结束时，这个记录点将被保存一个标识符。 并且，一旦touchesMoved被再次调用并结束，新的一组记录点将以不同的标识符保存。 任何想法如何做到这一点？ 

I would like to store the points whenever touchesMoved is called. So far everything is working fine. However what I want to do is to create a "new" array every time touchesMoved is called. For example, once the touch ended the array of points are then saved into database with an identifier of 1. The next time the touchesMoved is called, the array is emptied and replaced with another set of points with a different identifier. I tried incrementing an integer in touchesEnded every time it is called, but I figured out that the integer will remain the same every time the touch ended. So how will I do this? Any help will be very much appreciated.
 
UPDATE: For example I have this recorded points in my array:
 
100.000, 200.000
100.000, 202.000
100.000, 204.000
 
This points will be saved in the database with a identifier, let's say 1.
 
1 | 100.000 | 200.000
1 | 100.000 | 202.000
1 | 100.000 | 204.000
 
Now, when the touches moved and ended again, the new set of recorded points will be saved with a different identifier, let's say 2.
 
2 | 200.000 | 300.000
2 | 200.000 | 302.000
2 | 200.000 | 304.000
 
So basically what I want to happen is that every time the touchesMoved is called, it will record points that will be saved in an array. When the touches ended, this recorded points will be saved with an identifier. AND, once the touchesMoved is called again and ended, the new set of recorded points will be saved with a different identifier. Any ideas how to do it?

原文：https://stackoverflow.com/questions/11079686