… and a bit of iOS file faffing.
Getting paths to files inside the iOS application’s bundle:
NSString* objPath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"obj"];
‘objPath’ will now contain the full path to the file (test.obj in this example). Which is great if you’re going to poke it into an Obj-C function that understands NSStrings. However if you have C++ code it’ll probably want to be a std::string.
So to convert an NSString to a C++ std::string you can do this:
std::string filepath = [objPath cStringUsingEncoding:[NSString defaultCStringEncoding]];
And now you have a std::string with the contents of the NSString. Coding in Objective-C++ is like this, lots of converting one version of a concept to another.
If you like, you can also extract the path to a file using some simple C++:
std::string path = "root/data/home/file1.txt";
// no error checking here
std::string prefix = path.substr(0, path.find_last_of('/'));
C++ and Objective-C, making your programming efforts feel like it’s still 1990. I wrote a file parser in straight C++, it was like stepping back into my software engineering degree. There will be a post about it later, it’ll involve vi and a 9600bps serial terminal.
I found the following Stack Overflow questions useful:
