Methods of NSString in OC

NSString *str1 = @ "Beijing"; NSString *str2 = @ "Beijing"; Convert all to uppercase NSLog (@ "%@", [str1 uppercasestring]); All converted to lowercase NSLog (@ "%@", [str1 lowercasestring]); Initial Capital NSLog (@ "%@", [str1 capitalizedstring]); Compares two string contents whether the same BOOL b =[str1 ISEQUALTOSTRING:STR2]; Two string content comparison//nsorderedascending right > left//nsorderedsame content same//nsordereddescending left > right nscomparisonresult resul t = [str1 COMPARE:STR2]; if (result = = nsorderedascending) {NSLog (@ "right > Left");} else if (result = = Nsorderedsame) {NSLog (@ "content is the same");} else if (result = = nsordereddescending) {NSLog (@ "left > Right");}//Ignore case for comparison, return value as compare as result = [str1 Caseinsensitivec OMPARE:STR2]; if (result = = nsorderedascending) {NSLog (@ "right > Left");} else if (result = = Nsorderedsame) {NSLog (@ "content is the same");} else if (result = = nsordereddescending) {NSLog (@ "left > Right")}//Determines whether the string starts with the specified string [str1 hasprefix:@ "AAA"]; Determines whether the string ends with the specified string [str1 hassuffix:@ "AAA"]; Determines whether the string contains the specified string, returns the position and length nsrange range = [@ "123456" rangeofstring:@ "456"]; NSLog (@ "%@", NSStringFromrange (range)); Reverse Search range = [@ "123456456qweasasd456" rangeofstring:@ "456" options:nsbackwardssearch]; NSLog (@ "%@", Nsstringfromrange (range)); Specify a range to search range = Nsmakerange (0, 9); range = [@ "123456456qweasasd456" rangeofstring:@ "456" Options:nsbackwardssearch Range:range]; NSLog (@ "%@", Nsstringfromrange (range)); [CPP]View Plaincopyprint?

2. //intercept of strings   
4. NSString *str = @"123456789";
6. NSLog (@"%@", [str substringfromindex:3]);
8. NSLog (@"%@", [str substringtoindex:6]);
10. NSLog (@"%@", [str substringwithrange:nsmakerange (3, 3)]);
14. //Split the string with the specified string, returning an array   
16. Nsarray *array = [@"1,2,3,4,5,6" componentsseparatedbystring:@","];
18. NSLog (@"%@", array);
22. //Combine strings in an array into one file path   
24. Nsmutablearray *components = [Nsmutablearray array];
26. [Components addobject:@"Users"];
28. [Components addobject:@"Centralperk"];
30. [Components addobject:@"Desktop"];
32. NSString *path = [NSString pathwithcomponents:components];
34. NSLog (@"%@", Path); //users/centralperk/desktop
38. //Divide a path into an array   
40. Nsarray *array1 = [path pathcomponents];
42. NSLog (@"%@", array1);
46. //Determine if it is an absolute path (based on: Start with '/')   
48. Path = @"/users/centralperk/desktop";
50. NSLog (@"%i", [path Isabsolutepath]);
54. //Get the last directory   
56. NSLog (@"%@", [path lastpathcomponent]);
60. //Delete last directory   
62. NSLog (@"%@", [path stringbydeletinglastpathcomponent]);
66. //Splicing a directory   
68. NSLog (@"%@", [path stringbyappendingpathcomponent:@"AAA"]); ///users/centralperk/desktop/aaa
70. NSLog (@"%@", [path stringbyappendingstring:@"AAA"]); ///users/centralperk/desktopaaa
72. NSLog (@"%@", [path stringbyappendingformat:@"%@%@", @"B",@ "C"  ]); ///USERS/CENTRALPERK/DESKTOPBC
76. //Expand name out   
78. //Get extension name, without.   
80. NSString *str2 = @"users/centralperk/desktop/test.txt";
82. NSLog (@"%@", [str2 pathextension]);
84. //Add extension name, no need to bring.   
86. NSLog (@"%@", [str2 stringbyappendingpathextension:@"MP3"]);
88. //delete extension name, with. Piece Delete   
90. NSLog (@"%@", [str2 stringbydeletingpathextension]);
94. //String converted to int double float   
96. NSString *STR3 = @"123";
98. NSLog (@"%i", [Str3 intvalue]);
100. NSLog (@"%zi", [str3 length]);
104. //Remove characters from the specified position   
106. Unichar C = [Str3 characteratindex:2];
108. NSLog (@"%c", C);
112. //to a C-language string   
114. Const   char *s = [Str3 utf8string];
116. NSLog (@"%s", s);

The intercept of the string nsstring *str = @ "123456789";        NSLog (@ "%@", [str substringfromindex:3]);        NSLog (@ "%@", [str substringtoindex:6]);                NSLog (@ "%@", [Str substringwithrange:nsmakerange (3, 3)]);        Splits a string with the specified string, returning an array nsarray *array = [@ "1,2,3,4,5,6" componentsseparatedbystring:@ ","];                NSLog (@ "%@", array);        Combines the strings in an array into a file path nsmutablearray *components = [Nsmutablearray array];        [Components addobject:@ "Users"];        [Components addobject:@ "Centralperk"];        [Components addobject:@ "Desktop"];        NSString *path = [NSString pathwithcomponents:components];  NSLog (@ "%@", Path);        Users/centralperk/desktop//divides a path into an array nsarray *array1 = [path pathcomponents];                NSLog (@ "%@", array1);        Determines whether the absolute path (depending on whether it starts with '/') path = @ "/users/centralperk/desktop";                NSLog (@ "%i", [path Isabsolutepath]);         Gets the last directory NSLog (@ "%@", [path lastpathcomponent]);       Delete the last directory NSLog (@ "%@", [path stringbydeletinglastpathcomponent]);   Splicing a directory NSLog (@ "%@", [Path stringbyappendingpathcomponent:@ "AAA"]);      USERS/CENTRALPERK/DESKTOP/AAA NSLog (@ "%@", [Path stringbyappendingstring:@ "AAA"]);  USERS/CENTRALPERK/DESKTOPAAA NSLog (@ "%@", [Path stringbyappendingformat:@ "%@%@", @ "B", @ "C"]);        USERS/CENTRALPERK/DESKTOPBC//Expand name out//Get extension name, without.        NSString *str2 = @ "Users/centralperk/desktop/test.txt";        NSLog (@ "%@", [str2 pathextension]);        Add extension name, no need to bring.        NSLog (@ "%@", [str2 stringbyappendingpathextension:@ "MP3"]);                Delete extension name, with. Piece delete NSLog (@ "%@", [str2 stringbydeletingpathextension]);        The string is converted to int double float NSString *STR3 = @ "123";        NSLog (@ "%i", [Str3 intvalue]);                NSLog (@ "%zi", [STR3 length]);        Remove the character at the specified position unichar c = [Str3 characteratindex:2];                NSLog (@ "%c", c); C-language-converted string Const CHAr *s = [Str3 utf8string]; NSLog (@ "%s", s);

Methods of NSString in OC