iOS write and read file to NSMutableArray

好用的兩個讀取寫入function

- (BOOL) writeToFile:(NSString *)filename writeData:(NSMutableArray *)data{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *fileName = [NSString stringWithFormat:@"%@/%@", documentsDirectory, filename];

    

    return [data writeToFile:fileName atomically:NO];

    

}

- (BOOL) loadFromFile:(NSString *)filename writeData:(NSMutableArray *)data{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *fileName = [NSString stringWithFormat:@"%@/%@", documentsDirectory, filename];

    

    [data addObjectsFromArray:[NSMutableArray arrayWithContentsOfFile:fileName]];

    return 0;

}