如何在忽略大小写的情况下最好地比较两个NSString对象？

Question

I want to compare two strings. It fails when the string have capital letter. How do I convert both string to capitalize and compare.

I have a sample code, can someone correct this.

if ([[txtAnswer.text capitalizedString] isEqualToString:[answer capitalizedString]]) {
     // Do somehing
 }

Answer 1

如果查看NSString类引用，您将在标题识别和比较字符串下看到方法caseInsensitiveCompare:和localizedCaseInsensitiveCompare: .

Answer 2

You might try something like:

if ([txtAnswer.text caseInsensitiveCompare: answer] == NSOrderedSame) {
 // do something.
}

Answer 3

You can do a case insensitive string compare.

if([txtAnswer.text compare:answer options:NSCaseInsensitiveSearch] == NSOrderedSame)
{
    // Do somehing
}