Ios is case-insensitive and ios is case-insensitive.

Ios is case-insensitive and ios is case-insensitive.

1. NSString * str;
2. // Use stringWithFormat to generate a formatted string
3. Str = [NSString stringWithFormat: @ "This is % @", "John"];
4. NSLog (@ "str ---> % @", str );
5. // String length;
6. NSLog (@ "The length of this string is % @", [str length]);
7. // When the string is compared with isbench tostring, NO (false) is returned, and isbench tostring is case sensitive.
8. BOOL isequal = [str isw.tostring: @ "this is John"];
10. // String sequence comparison column compare, and the returned result is NSComparisonResult
11. // Type enum _ NSComparisonResult {
12. // NSOrderedAscending =-1,
13. // NSOrderedSame,
14. // NSOrderedDescending
15. //}
16. Int result = [@ "bool" compare: @ "cool"];
17. NSLog (@ "The result is % d", result );
19. // Compare comparison Rules options
20. // NSLiteralSearch case sensitive (full comparison)
21. // NSCaseInsensitiveSearch is case insensitive
22. // NSNumericSearch only compares the number of strings, not the String Literal Value
23. Int result1 = [@ "This is John" compare: @ "this is John" options: NSCaseInsensitiveSearch | NSNumericSearch];
24. NSLog (@ "The result is % d", result1 );
26. // Whether the start of the string contains another string hasPrefix. The returned result is YES (true)
27. BOOL isHas = [str hasPrefix: @ "This"];
28. // Whether the end of the string contains another string hasSuffix. The returned result is YES (true)
29. BOOL isHas = [str hasSuffix: @ "John"];
31. // Find the position of the string in another string
32. Nsange range = [str rangeOfString: @ "is" options: NSCaseInsensitiveSearch];
33. NSLog (@ "The location in the string named 'str' of 'is' @ d", range. location );