Question

在解析数据时，我在sqlite中插入数据。但由于某种原因，当我运行SELECT查询时，它会返回额外的行和制表符空间。当我编写此查询时，它会正确插入数据，但会有额外的空格。

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName 
   namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName 
    attributes:(NSDictionary *)attributeDict {

  if([elementName isEqual:@"root"]) {
}

else if([elementName isEqualToString:@"value"]) {
    value = [[Value alloc] init] ;
}
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { 

    if(!trueValue) 
        trueValue = [[NSMutableString alloc] initWithString:string];
    else{
        [trueValue appendString:string];

    }
    }

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName 
   namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {

if([elementName isEqualToString:@"root"])
    return;


if([elementName isEqualToString:@"value"]) {

    NSString *sqlQuery = [NSString stringWithFormat:@"INSERT OR REPLACE INTO DETAIL(ID,KEY, TITLE) VALUES ('%@','%@','%@');", key, parent_key, title];
    const char *insert_sql = [sqlQuery UTF8String];
    sqlite3_exec(db, insert_sql, NULL, NULL, NULL);
}



else if([elementName isEqualToString:@"key"])
    [value setValue:finalValue forKey:elementName]

[trueValue release];
trueValue = nil;

}

如何更换多余的空格基本上如下：“\ n \ t \ t \ t”在所有行的此语句之前带有“”？

Answer 1

我有一个类似的问题，我通过修剪所有的空格字符来解决这个问题：

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { 

    if(!trueValue) 
        trueValue = [[NSMutableString alloc] initWithString:[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
    else
        [trueValue appendString:[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];

}

Answer 2

试试这个：

[string stringByReplacingOccurrencesOfString：@“\ n \ t \ t \ t”withString：@“”]

SQLITE Insert返回带有额外行的值

2 个答案: