Malloc to a CGPoint Pointer throwing EXC_BAD_ACCESS when accessing
- by kdbdallas
I am trying to use a snippet of code from a Apple programming guide, and I am getting a EXC_BAD_ACCESS when trying to pass a pointer to a function, right after doing a malloc.
(For Reference: iPhone Application Programming Guide: Event Handling - Listing 3-6)
The code in question is really simple:
CFMutableDictionaryRef touchBeginPoints;
UITouch *touch;
....
CGPoint *point = (CGPoint *)CFDictionaryGetValue(touchBeginPoints, touch);
if (point == NULL)
{
point = (CGPoint *)malloc(sizeof(CGPoint));
CFDictionarySetValue(touchBeginPoints, touch, point);
}
Now when the program goes into the if statement it assigns the 'output' of malloc into the point variable/pointer.
Then when it tries to pass point into the CFDictionarySetValue function it crashes the application with: Program received signal: “EXC_BAD_ACCESS”.
Someone suggested not doing the malloc and pass the point var/pointer as: &point, however that still gave me a EXC_BAD_ACCESS.
What I am (and it looks like Apple) doing wrong???
Thanks in advance.
