ios - Tessdata未复制到文档目录中

Question

我正在使用以下方法在我的项目中添加经过tesseract训练的数据

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Set up the tessdata path. This is included in the application bundle
        // but is copied to the Documents directory on the first run.
        NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentPath = ([documentPaths count] > 0) ? [documentPaths objectAtIndex:0] : nil;

        NSString *dataPath = [documentPath stringByAppendingPathComponent:@"tessdata"];
        NSFileManager *fileManager = [NSFileManager defaultManager];
        // If the expected store doesn't exist, copy the default store.
        if (![fileManager fileExistsAtPath:dataPath]) {
            // get the path to the app bundle (with the tessdata dir)
            NSString *bundlePath = [[NSBundle mainBundle] bundlePath];
            NSString *tessdataPath = [bundlePath stringByAppendingPathComponent:@"tessdata"];
            if (tessdataPath) {
                [fileManager copyItemAtPath:tessdataPath toPath:dataPath error:NULL];
            }
        }

        setenv("TESSDATA_PREFIX", [[documentPath stringByAppendingString:@"/"] UTF8String], 1);

        // init the tesseract engine.
        tesseract = new tesseract::TessBaseAPI();
        tesseract->Init([dataPath cStringUsingEncoding:NSUTF8StringEncoding], "eng");
    }
    return self;
}

得到以下错误

Error opening data file /Users/frf/Library/Application Support/
iPhone Simulator/6.1/Applications/686F83C8-526C-47FB-9F02-
E44FBE69F60B/Documents/tessdata/eng.traineddata

tessdata未复制到文档目录中。我该怎么办 ？

请建议编辑我上面的代码...

Answer 1

我假设tessdata目录不存在。
在用户/文档目录中。