iOS关于NSCharacterSet 的用法

 / Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
 - (void)viewDidLoad
 {
     [super viewDidLoad];

     [self test];

     // Reference output...
     dumpCharacterSet( @"alphanumericCharacterSet" );
     dumpCharacterSet( @"controlCharacterSet" );
     dumpCharacterSet( @"decimalDigitCharacterSet" );
     dumpCharacterSet( @"decomposableCharacterSet" );
     dumpCharacterSet( @"illegalCharacterSet" );
     dumpCharacterSet( @"letterCharacterSet" );
     dumpCharacterSet( @"lowercaseLetterCharacterSet" );
     dumpCharacterSet( @"nonBaseCharacterSet" );
     dumpCharacterSet( @"punctuationCharacterSet" );
     dumpCharacterSet( @"uppercaseLetterCharacterSet" );
     dumpCharacterSet( @"whitespaceAndNewlineCharacterSet" );
     dumpCharacterSet( @"whitespaceCharacterSet" );
 }

 - (void)test
 {
     // Set up for reading testString
     NSString *testString = @"Los Angeles;8.25;0.580561574;1,Tokyo;1.9;0.643872234;1;Honolulu,0;0;0;Toronto;7.9;5.3322;3;";
     // Parse CSV with NSScanner
     NSScanner *myScanner = [NSScanner scannerWithString:testString];

     NSString    *location;
     float        theRevenue;
     float        thePercent;
     int            theRank;

     // Set up data delimiter using semicolon//分号

     NSCharacterSet *CharacterSet;

     //Returns a character set containing the characters in a given string.
     CharacterSet = [NSCharacterSet characterSetWithCharactersInString:@";,"];

     // Double check scanner string
     NSLog (@"Scanner string\n");

     //Returns the string with which the receiver was created or initialized.
     NSLog (@"%@",[myScanner string]);

     // scanner loop start
     while ([myScanner isAtEnd] == NO) {

         if ( [myScanner scanUpToCharactersFromSet:CharacterSet intoString:&location] ) {
             NSLog (@"%@",location);
         }

         // Skipping the ; and ,delimiter
         if([myScanner scanString:@";" intoString:NULL] || [myScanner scanString:@"," intoString:NULL])
             ;
         // Read Revenue data up to ; delimiter and skipping
         //Scans for a float value, returning a found value by reference.
         if([myScanner scanFloat:&theRevenue])
             NSLog(@"%lf",theRevenue);
         if([myScanner scanString:@";" intoString:NULL] || [myScanner scanString:@"," intoString:NULL])
             ;

         // Read Percentage data up to ; delimiter and skipping
         if([myScanner scanFloat:&thePercent])
             NSLog(@"%lf",thePercent);
         if([myScanner scanString:@";" intoString:NULL] || [myScanner scanString:@"," intoString:NULL])
             ;

         // Read Ranking data up to ; delimiter and skipping
         if([myScanner scanInt:&theRank])
             NSLog(@"%i",theRank);
         if([myScanner scanString:@";" intoString:NULL] || [myScanner scanString:@"," intoString:NULL])
             ;
     }



 }

 void dumpCharacterSet( NSString *name )
 {
     unichar idx;
     NSCharacterSet *cset = [NSCharacterSet performSelector: NSSelectorFromString(name)];

     printf("Character set (0-127): %s\n7-Bit: ", [name UTF8String]);

     for( idx = 0; idx < 256; idx++ )
     {
         if ( 128 == idx ) {
             printf( "\n8-Bit: " );
         }

         //Returns a Boolean value that indicates whether a given character is in the receiver.
         if ([cset characterIsMember: idx])
         {
             //判断字符c是否为可打印字符（含空格）
             if ( isprint(idx) ) {
                 printf( "%c ", idx);
             }
             else {
                 printf( "%02x ", idx);
             }
         }
     }
     printf("\n\n");
 }

使用xcode4.0编译，有错误，说<p class="p1"><span class="s1">void</span> dumpCharacterSet( NSString *name )方法有冲突，但是呢，，还能运行。。。</p><p class="p1">xcode4.0的bug</p>