0
  • (NSData *)read:(long)offset

        size:(long)size {

    if (_data != nil) {

    return [_data subdataWithRange:NSMakeRange(offset, (unsigned int)size)];

    }
    [_file seekToFileOffset:offset];
    return [_file readDataOfLength:size];

}

控制台提示错误:-[OS_dispatch_data subdataWithRange:]: unrecognized selector sent to instance

2019-04-28 提问
0 个回答

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