Comparing the values of two nsstrings

Question

So I have been trying to compare two NSStrings in xcode. However, it is not working. What am I doing wrong?

NSString Prog are characters that are xml parsed from mysql

   char *cStr = "YES";
        NSString *str3 = [NSString stringWithUTF8String:cStr];
        if ([str3 isEqualToString:prog]) {
             [switch1 setOn:YES animated:YES];
        }
        else {
             [switch1 setOn:NO animated:YES];
        }

Answer 1

-[NSString isEqualToString:] is normally what you would use, and what you are using in such a scenario. Ensure that prog is a valid NSString (eg the correct type and not nil ), and keep in mind that string comparison in this implementation is case-sensitive -- ie "Yes" would not be equal to "YES" .

Answer 2

使用以下方法比较两个NSString：

[yourString isEqualToString:@"testString"]