IOS changes the case sensitivity of letters, and iOS letters

IOS changes the case sensitivity of letters, and iOS letters

Use lowercaseString and uppercaseString

 

 

-(Void) test {

NSString * str = @ "person ";

NSString * str1 = [str lowercaseString];

NSString * str2 = [str uppercaseString];

NSLog (@ "% @, % @", str1, str2 );

　

 

NSString * text = @ "Hello World ";

Text = [text stringByReplacingCharactersInRange: NSMakeRange (0, 1) withString: [[text substringToIndex: 1] lowercaseString];

NSLog (@ "text: % @", text );

 

 

}

Print result:

11:49:47. 455Change case sensitivity[1058: 50425] str1: person

11:49:47. 455Change case sensitivity[1058: 50425] str2: PERSON

11:49:47. 456Change case sensitivity[1058: 50425] text: hello World