Question

我找不到解决方案。我将数据存储到本地SQLITE DB中。一切都有效，除了重音词。如图所示。

enter image description here

但是，如果我尝试使用SqliteManager（Firefox插件）存储重音词，一切正常。总而言之：当我使用我的应用程序存储重音词时，会出现奇怪的字符。我使用以下代码写入数据（读取相同）。基本上，所有字符串都是UTF8编码的。

-(NSInteger)writeData:(NSDictionary* )data table:(NSString* )table
{
    sqlite3_stmt    *sqlStatement;
    NSMutableArray  *columns   = [[NSMutableArray alloc] init];
    NSMutableArray  *values    = [[NSMutableArray alloc] init];
    NSMutableDictionary *temp = [[NSMutableDictionary alloc] initWithDictionary:data];
    @try {
        assert([data count] != 0);
        if ([[data allKeys] count] == 0) return 1;


        [temp removeObjectForKey:@"id"];
        [columns addObjectsFromArray:[temp allKeys]];
        NSString        *cols      = [columns componentsJoinedByString:@","];
        NSMutableString *colNames  = [[NSMutableString alloc] initWithString:
                                      [NSString stringWithFormat:@"INSERT INTO %s (",[table UTF8String]]];

        [colNames appendString:cols];
        [colNames appendString:@")"];

        // VALUES FOR  INSERT
        [values addObjectsFromArray:[temp allValues] ];
        NSMutableString *s = [[NSMutableString alloc] init];
        for(int i = 0; i < [values count]; i++)
        {
            [s setString:[NSString stringWithFormat:@"%@",[values objectAtIndex:i]]];
            const char* currentValue = [s UTF8String];
            [values setObject:[NSString stringWithFormat:@"\"%s\"",currentValue] atIndexedSubscript:i];
        }
        NSString        *vals       = [values componentsJoinedByString:@","];
        NSMutableString *valNames   = [[NSMutableString alloc] initWithString:@" VALUES ("];
        [valNames appendString:vals];
        [valNames appendString:@")"];

        [colNames appendString:valNames];
        const char *sql = [colNames UTF8String];
#ifdef DEBUG
         NSLog(@"avvDB writeDATA insert string %@",colNames);
#endif

        if(sqlite3_prepare(db, sql, -1, &sqlStatement, NULL) != SQLITE_OK)
        {
            NSLog(@"Problem with prepare statement write %s",sqlite3_errmsg(db));
            return 0;

        }
        if (sqlite3_exec(db, sql, NULL, NULL, NULL) == SQLITE_OK)
        {
           // NSLog(@"Last id %llu %s",sqlite3_last_insert_rowid(db),sqlite3_errmsg(db));
        }

    }// end try
    @catch(NSException* e)
    {
        NSLog(@"Eccezione in write %@",[e reason]);
    }
    @finally {
        sqlite3_reset(sqlStatement);
        sqlite3_finalize(sqlStatement);
        sqlStatement = nil;
        return sqlite3_last_insert_rowid(db);
    }


}

Answer 1

%s运算符不支持unicode字符。正如字符串编程指南的String Format Specifiers所述，它是“8位无符号字符的空终止数组。”

坦率地说，由于其他原因，你不应该使用stringWithFormat（如果其中一个字符串中有引号，那么......你的SQL语句会失败;你甚至会暴露给SQL注射攻击）。您应该使用?占位符（不带引号），然后为要绑定到相应问号的每个参数调用sqlite3_bind_text（注意，sqlite3_bind_xxx个函数使用基于1的索引，与使用基于0的索引的sqlite3_column_xxx不同。

将重音词存入Sqlite - iOS

1 个答案: