获取程序的Documents路径

gistfile1

/**
 Returns the path to the application's documents directory.
 */
- (NSString *)applicationDocumentsDirectory {
     
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
    return basePath;
}