I want store a number as a global variable. What syntax do I use, and how can other parts of my application access that variable?
For a standard global variable (not persistent when the app is terminated and restarted) add this to a header file (*.h) of your choice:
extern NSInteger MYGlobalVariable;
Then put this in the implementation file; (*.m, *.c, *.cpp):
MYGlobalVariable = 0; // Or any other default value.
That is how you do a bread and butter global variable.