IOS文件系统－获取相应文件夹

1。实现：NSFileManager

   - (NSArray *)URLsForDirectory:(NSSearchPathDirectory)directory inDomains:(NSSearchPathDomainMask)domainMask

   URLsForDirectory: NSLibraryDirectory(app应用的库文件夹) / NSCachesDirectory:缓存文件夹 /  NSDocumentDirectory

   inDomains: NSUserDomainMask

e.g.

    NSFileManager *fileManager = [[NSFileManager alloc] init];

    NSArray *documentUrls = [fileManager URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask];

    

    if ([documentUrls count] > 0){

        NSURL *documentsFolder = documentUrls[0];

        NSLog(@"%@", documentsFolder);

    } else {

        NSLog(@"Could not find the Documents folder.");

    }

    NSArray *cachesUrls = [fileManager URLsForDirectory:NSCachesDirectory  inDomains:NSUserDomainMask];

    

    if ([cachesUrls count] > 0){

        NSURL *cachesFolder = cachesUrls[0];

        NSLog(@"%@", cachesFolder);

    } else {

        NSLog(@"Could not find the Caches folder.");

    }

    

    NSString *tempDirectory = NSTemporaryDirectory();

    NSLog(@"Temp Directory = %@", tempDirectory);