小编pea*_*337的帖子

我创建了一个表如下:

CREATE TABLE IF NOT EXISTS 'e!' (
`aa` int(11) unsigned NOT NULL auto_increment,
`showName` TEXT NOT NULL default '',
`startDateTime` DATETIME NOT NULL default '',
`endDateTime` DATETIME NOT NULL default '',
PRIMARY KEY  (`aa`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8

然后尝试插入查询:

INSERT INTO e! (showname, startDateTime, endDateTime) VALUES('E! News ', '2012-05-03 19:00:00', '2012-05-03 20:00:00')

而且由于!表名中的错误,我假设它!是mysql中的一个特殊字符.我试图逃避它,但查询仍然失败.

所以,我能有特殊字符,如!或&在表名？如果是,那么我可能不得不以某种方式对它们进行编码？

谢谢.

ios声称文件已被写入,但更改从未实际保存,就像它们保留在缓冲区中一样.我需要冲洗还是什么？

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSString *myFilePath = [[NSBundle mainBundle]
                            pathForResource:@"MyFile"
                            ofType:@"txt"];

    NSLog(@"\n\nPath = \n%@", myFilePath);

    NSString *myFileContents = [NSString stringWithContentsOfFile:myFilePath
                                    encoding:NSUTF8StringEncoding
                                    error:nil];


    NSLog(@"\n\nContents = \n%@", myFileContents);

    [@"This line will be written to file" writeToFile:myFilePath
        atomically:YES encoding:NSUTF8StringEncoding error:nil];

    NSString *changedContents = [NSString stringWithContentsOfFile:myFilePath
                                    encoding:NSUTF8StringEncoding
                                    error:nil];

    NSLog(@"\n\nChanged Contents = \n%@", changedContents);
}

输出:

Path = 
/Users/hamzeh/Library/Application Support/iPhone Simulator/5.1/Applications/2B318687-A745-4CD9-85BA-52A01AB76F6E/savepersistentdata_tutorial.app/MyFile.txt

Contents = 
This is a text file.
The file will be displayed on the iPhone.
That is all for now. 

Changed Contents …