Question

我试图用这两种方法将数据从json插入到sqlite3但是它给了我异常 - [NSDecimalNumber UTF8String]：发送到实例的无法识别的选择器'请帮助我，我是ios的新手..



 -(void)insertintoDatabase:(NSMutableArray *)allCatData
    {
        for (int i=0;i<[allCatData count] ;i++)
        {
            CategoryData *catData=[allCatData objectAtIndex:i];
            appdelegate.categoryString=catData.categoryname;

            NSLog(@"array size :%d",[catData.imageArraya count]);

            for (int j=0; j<[catData.imageArraya count]; j++)
            {
                imageconvert *convertedData=[catData.imageArraya objectAtIndex:j];
                NSError* error = nil;

                NSData* thumbData = [NSData dataWithContentsOfURL: [NSURL URLWithString:[convertedData.thumbimage stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]] options:NSDataReadingUncached error:&error];

    //            NSLog(@"aaaaa %@",[convertedData.thumbimage stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]);
                //NSLog(@"aaadata %@",thumbData);

                NSData* imageData = [NSData dataWithContentsOfURL: [NSURL URLWithString:[convertedData.mainimage stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]] options:NSDataReadingUncached error:&error];

    //            NSLog(@"bbbbb %@",[convertedData.mainimage stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]);
    //            NSLog(@"bbbdata %@",imageData);


                if (error)
                {
                    NSLog(@"%@", [error localizedDescription]);
                }
                else
                {
                    //insert date modified and categorynm into database
                    [self SaveThumbDatatosql:thumbData withImageData:imageData WithCatName:catData.categoryname withImagename:convertedData.imageName withLastmodified:convertedData.lastmodified];
                }
            }
        }
    }

- (void) SaveThumbDatatosql:(NSData*) thumbData  withImageData:(NSData*) imageData WithCatName:(NSString*) CategoryName withImagename:(NSString*) ImageName withLastmodified:(NSString*) Lastmodified
{
//    NSLog(@"thumbData:%@ imageData:%@ CategoryName:%@ ImageName:%@ Lastmodified:%@",thumbData,imageData,CategoryName,ImageName,Lastmodified);

    sqlite3 *database;
    if (sqlite3_open([appdelegate.databasePath UTF8String], &database) == SQLITE_OK)
    {
        sqlite3_stmt *statement;

        const char* sqliteQuery = "INSERT INTO CategoryTable (ThumbImagePath,ImagePath,Categoryname,Imagename,Lastmodified) VALUES (?,?,?,?,?)";

        if (sqlite3_prepare_v2(database, sqliteQuery, -1, &statement, NULL) == SQLITE_OK)
        {
            NSLog(@"CategoryName:%@ ImageName:%@ Lastmodified:%@",CategoryName,ImageName,Lastmodified);

            sqlite3_bind_blob(statement, 1, [thumbData bytes], [thumbData length], SQLITE_STATIC);
            sqlite3_bind_blob(statement, 2, [imageData bytes], [imageData length], SQLITE_STATIC);
            sqlite3_bind_text(statement, 3, [CategoryName UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 4, [ImageName UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 5, [Lastmodified UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_step(statement);
            sqlite3_finalize(statement);
            NSLog(@"inserted ");
        }
        else
        {
            NSAssert1(0, @"error:'%s'", sqlite3_errmsg(database));
            NSLog(@"not inserted ");
        }
        sqlite3_close(database);
    }
}

Answer 1

看起来Lastmodified是NSDecimalNumber，您可以调用选择器UTF8String。

- [NSDecimalNumber UTF8String]：发送到实例的无法识别的选择器'

1 个答案: