这些奇怪的'流氓角色'在我的NSString结尾处是什么？

我有一个文本文件（songlist.txt），我的应用程序从服务器中检索并存储在本地。当我尝试在我的应用程序中使用该文件的内容时，我收到了意想不到的结果。当我研究这个问题时，我发现奇怪的字符有时出现在文本文件的NSString内容的末尾。
这些奇怪的'流氓角色'在我的NSString结尾处是什么？

为什么这些奇怪的字符在这里？（下面是我的源）：

1）I
2）UPP†
3）MUL†
4）ID

：

在字符串的末尾奇怪的字符的例子

//文本文件的确切内容（songlist.txt）

宋One.mp3
宋Two.mp3
宋Three.mp3
宋Four.mp3
宋Five.mp3

//Downloading Songlist from the internet, Saving it to Documents folder 
-(void)downloadSongList 
{ 
    NSString *songlistString; 

    NSString *URLString_list = @"http://et.bicdoss.com/app/songlist.txt"; 
    NSURL *URL_list = [NSURL URLWithString:[URLString_list stringByAddingPercentEscapesUsingEncoding:       NSASCIIStringEncoding]]; 

    // Get Data of Contents (for Write to Disk) 
    NSData *songData = [NSData dataWithContentsOfURL:URL_list]; 

    if(songData == nil) { 

     NSLog(@"SONGLIST.TXT NOT DOWNLOADED"); 

    }else{ 

    // Write Songlist.txt to disk 
    NSString *filePath = [[self documentsDirectory] stringByAppendingPathComponent:@"Music/songlist.txt"]; 
    [songData writeToFile:filePath atomically:YES]; 
     NSLog(@"SONGLIST.TXT DOWNLOADED"); 
    } 

} 

// Retrieve songlist.txt from local documents folder 
-(NSString*)getLocalSongList 
{ 
NSData *textFileData = [NSData dataWithContentsOfFile:[[self documentsDirectory] stringByAppendingPathComponent:@"Music/songlist.txt"]]; 
NSString *textFileString = [NSString stringWithUTF8String:[textFileData bytes]]; 

return textFileString;   
} 

//Create NSMutableArray of contents of songlist.txt (seperated by linebreaks) 

... 
NSMutableArray *files_catalog; 
    files_catalog = [[NSMutableArray alloc] init]; 
    [files_catalog addObjectsFromArray:[[self getLocalSongList] componentsSeparatedByString: @"\n"]]; 
    [files_catalog retain]; 

    for(int a = 0; a<[files_catalog count]; a++){ 
     NSLog(@"Contents of Object %i (files_catalog) %@", a, [files_catalog objectAtIndex:a]); 
/* 

NOTE: 
The above NSLog statement always gives strange output (note strange characters at the end of last filename:) 

(output) 
2010-02-02 21:22:27.145 SomeApp[19670:207] >>>>>>>>>>>>>>>>>>>> Cntnts of Objct 0 (files_catalog) Song One.mp3 
2010-02-02 21:22:27.145 SomeApp[19670:207] >>>>>>>>>>>>>>>>>>>> Cntnts of Objct 1 (files_catalog) Song Two.mp3 
2010-02-02 21:22:27.146 SomeApp[19670:207] >>>>>>>>>>>>>>>>>>>> Cntnts of Objct 2 (files_catalog) Song Three.mp3 
2010-02-02 21:22:27.146 SomeApp[19670:207] >>>>>>>>>>>>>>>>>>>> Cntnts of Objct 3 (files_catalog) Song Four.mp3 
2010-02-02 21:22:27.146 SomeApp[19670:207] >>>>>>>>>>>>>>>>>>>> Cntnts of Objct 4 (files_catalog) Song Five.mp3upp† 


Some other examples of strange characters at the end were: 

I 
upp† 
mul† 
ID 

*/ 
} 

...

来源

2010-02-02 RexOnRoids

它看起来像编码是越来越乱了，当您导入。尝试使用stringWithContentsOfFile：encoding：error：方法。

[NSString stringWithContentsOfFile:[[self documentsDirectory] stringByAppendingPathComponent:@"Music/songlist.txt"] encoding:NSUTF8StringEncoding error:nil];

加上它跳过NSData步骤。

来源

2010-02-02 13:01:29 kubi

这些奇怪的'流氓角色'在我的NSString结尾处是什么？

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