把CGPoint放入数组的过程是这样的：
Java代码
- NSArray *array=[NSArray arrayWithObjects:NSStringFromCGPoint(0.0f,0.0f),NSStringFromCGPoint(0.0f,0.0f),nil];
从数组中取值的过程是这样的：
Java代码
- CGPoint point=CGPointFromNSString（[array objectAtIndex:2]）；