IOS changes the case of letters

Using lowercasestring,uppercasestring

-(void) test{    nsstring *teststring = @ "Hello World";        Lower case    NSString *lowercasestring1 = [teststring lowercasestring];    NSString *lowercasestring2 = teststring.lowercasestring;        Upper Case    NSString *uppercasestring1 = [lowerCaseString1 uppercasestring];    NSString *uppercasestring2 = lowercasestring1.uppercasestring;        NSLog (@ "lowerCaseString1:%@", lowerCaseString1);    NSLog (@ "lowerCaseString2:%@", lowerCaseString2);    NSLog (@ "upperCaseString1:%@", upperCaseString1);    NSLog (@ "upperCaseString2:%@", upperCaseString2);        Capitalize the first word of the sentence    nsstring *txt = @ "Hi my friends!";    TXT = [txt stringbyreplacingcharactersinrange:nsmakerange (0,1) withstring:[[txt substringtoindex:1] uppercaseString] ];    NSLog (@ "txt:%@", txt);}

Printing results:

2014-08-26 17:00:30.266 myapp[68821:60b] Lowercasestring1:hello world2014-08-26 17:00:30.267 MyApp[68821:60b] Lowercasestring2:hello world2014-08-26 17:00:30.267 myapp[68821:60b] Uppercasestring1:hello world2014-08-26 17:00:30.267 myapp[68821:60b] Uppercasestring2:hello world2014-08-26 17:00:30.268 MyApp[68821:60b] Txt:hi my friends!

Reference Source:

Http://stackoverflow.com/questions/8693741/converting-all-text-to-lower-case-in-objective-c

Http://stackoverflow.com/questions/2432452/how-to-capitalize-the-first-word-of-the-sentence-in-objective-c

IOS changes the case of letters