用单引号替换双引号以存储在SQLite中

Question

我想用字符串中的单引号替换所有双引号。 我试过使用stringByReplacingOccurrencesOfString但它不起作用。 如何使它用单引号替换所有双引号，以便可以将其存储到数据库中？

sqlite3_stmt    *statement;

NSString *string = [NSString stringWithString:charDesc.text];
[string stringByReplacingOccurrencesOfString:@"\"" withString:@"''"];

if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK){
    NSString *insertSQL = [NSString stringWithFormat: @"UPDATE CHARACTER SET charName = \"%@\", charDescription = \"%@\" WHERE charID = %i", charName.text, charDesc.text, charID];

    const char *insert_stmt = [insertSQL UTF8String];

    sqlite3_prepare_v2(database, insert_stmt, -1, &statement, NULL);
    if (sqlite3_step(statement) == SQLITE_DONE){
        status.text = @"Succesfully Updated!";
    }else{
        status.text = @"Failed to Update!";
    }

    sqlite3_finalize(statement);
    sqlite3_close(database); 
}

Answer 1

string=[string stringByReplacingOccurrencesOfString:@"\"" withString:@"'"];