I guess this is a beginner's problem, but I was trying to check if a directory exists in my Documents folder on the iPhone. I read the documentation and came up with this code which unfortunately crashed with EXC_BAD_ACCESS in the BOOL fileExists line:
-(void)checkIfDirectoryAlreadyExists:(NSString *)name
{
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSString *path = [[self documentsDirectory] stringByAppendingPathComponent:name];
BOOL fileExists = [fileManager fileExistsAtPath:path isDirectory:YES];
if (fileExists)
{
NSLog(@"Folder already exists...");
}
}
I don't understand what I've done wrong? It looks all perfect to me and it certainly complies with the docs, not? Any revelations as to where I went wrong would be highly appreciated! Thanks.
UPDATED:
Still not working...
-(void)checkIfDirectoryAlreadyExists:(NSString *)name
{
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSString *path = [[self documentsDirectory] stringByAppendingPathComponent:name];
BOOL isDir;
BOOL fileExists = [fileManager fileExistsAtPath:path isDirectory:&isDir];
if (fileExists)
{
if (isDir) {
NSLog(@"Folder already exists...");
}
}
}
Take a look in the documentation for this method signature:
- (BOOL)fileExistsAtPath:(NSString *)path isDirectory:(BOOL *)isDirectory
You need a pointer to a BOOL var as argument, not a BOOL itself. NSFileManager will record if the file is a directory or not in that variable. For example:
BOOL isDir;
BOOL exists = [fm fileExistsAtPath:path isDirectory:&isDir];
if (exists) {
/* file exists */
if (isDir) {
/* file is a directory */
}
}