iOS关于NSCharacterSet 的用法

1. / Implement viewDidLoad to do additional setup after loading the view, typically from a nib.  
2. - (void)viewDidLoad  
3. {  
4.     [super viewDidLoad];  
5.       
6.     [self test];  
7.       
8.     // Reference output...  
9.     dumpCharacterSet( @"alphanumericCharacterSet" );  
10.     dumpCharacterSet( @"controlCharacterSet" );  
11.     dumpCharacterSet( @"decimalDigitCharacterSet" );  
12.     dumpCharacterSet( @"decomposableCharacterSet" );  
13.     dumpCharacterSet( @"illegalCharacterSet" );  
14.     dumpCharacterSet( @"letterCharacterSet" );  
15.     dumpCharacterSet( @"lowercaseLetterCharacterSet" );  
16.     dumpCharacterSet( @"nonBaseCharacterSet" );  
17.     dumpCharacterSet( @"punctuationCharacterSet" );  
18.     dumpCharacterSet( @"uppercaseLetterCharacterSet" );  
19.     dumpCharacterSet( @"whitespaceAndNewlineCharacterSet" );  
20.     dumpCharacterSet( @"whitespaceCharacterSet" );  
21. }  
22.   
23. - (void)test  
24. {  
25.     // Set up for reading testString  
26.     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;";  
27.     // Parse CSV with NSScanner  
28.     NSScanner *myScanner = [NSScanner scannerWithString:testString];  
29.       
30.     NSString    *location;  
31.     float        theRevenue;  
32.     float        thePercent;  
33.     int            theRank;  
34.       
35.     // Set up data delimiter using semicolon//分号  
36.       
37.     NSCharacterSet *CharacterSet;  
38.       
39.     //Returns a character set containing the characters in a given string.  
40.     CharacterSet = [NSCharacterSet characterSetWithCharactersInString:@";,"];  
41.       
42.     // Double check scanner string  
43.     NSLog (@"Scanner string\n");  
44.       
45.     //Returns the string with which the receiver was created or initialized.  
46.     NSLog (@"%@",[myScanner string]);  
47.       
48.     // scanner loop start  
49.     while ([myScanner isAtEnd] == NO) {  
50.           
51.         if ( [myScanner scanUpToCharactersFromSet:CharacterSet intoString:&location] ) {  
52.             NSLog (@"%@",location);  
53.         }          
54.           
55.         // Skipping the ; and ,delimiter  
56.         if([myScanner scanString:@";" intoString:NULL] || [myScanner scanString:@"," intoString:NULL])  
57.             ;  
58.         // Read Revenue data up to ; delimiter and skipping  
59.         //Scans for a float value, returning a found value by reference.  
60.         if([myScanner scanFloat:&theRevenue])  
61.             NSLog(@"%lf",theRevenue);  
62.         if([myScanner scanString:@";" intoString:NULL] || [myScanner scanString:@"," intoString:NULL])  
63.             ;  
64.           
65.         // Read Percentage data up to ; delimiter and skipping  
66.         if([myScanner scanFloat:&thePercent])  
67.             NSLog(@"%lf",thePercent);  
68.         if([myScanner scanString:@";" intoString:NULL] || [myScanner scanString:@"," intoString:NULL])  
69.             ;  
70.           
71.         // Read Ranking data up to ; delimiter and skipping  
72.         if([myScanner scanInt:&theRank])  
73.             NSLog(@"%i",theRank);  
74.         if([myScanner scanString:@";" intoString:NULL] || [myScanner scanString:@"," intoString:NULL])  
75.             ;  
76.     }      
77.   
78.       
79.       
80. }  
81.   
82. void dumpCharacterSet( NSString *name )  
83. {  
84.     unichar idx;  
85.     NSCharacterSet *cset = [NSCharacterSet performSelector: NSSelectorFromString(name)];  
86.       
87.     printf("Character set (0-127): %s\n7-Bit: ", [name UTF8String]);  
88.       
89.     for( idx = 0; idx < 256; idx++ )  
90.     {  
91.         if ( 128 == idx ) {  
92.             printf( "\n8-Bit: " );  
93.         }  
94.           
95.         //Returns a Boolean value that indicates whether a given character is in the receiver.  
96.         if ([cset characterIsMember: idx])  
97.         {  
98.             //判断字符c是否为可打印字符（含空格）  
99.             if ( isprint(idx) ) {  
100.                 printf( "%c ", idx);  
101.             }  
102.             else {  
103.                 printf( "%02x ", idx);  
104.             }  
105.         }  
106.     }  
107.     printf("\n\n");  
108. } 
     

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>