不区分大小写的 NSString 比较

发布于 2024-10-08 03:08:37 字数 128 浏览 7 评论 0原文

使用此代码我可以比较字符串值。

[elementName isEqualToString: @"Response"]

但这是区分大小写的。有没有办法比较字符串而不区分大小写？

原文

Using this code I am able to compare string values.

[elementName isEqualToString: @"Response"]

But this compares case-sensitively. Is there a way to compare the string without case sensitivity?

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绳情 2024-10-15 03:08:37

NSString 上有一个 caseInsensitiveCompare: 方法，为什么不阅读文档？该方法返回 NSComparisonResult:

enum {
   NSOrderedAscending = -1,
   NSOrderedSame,
   NSOrderedDescending
};
typedef NSInteger NSComparisonResult;

…啊，抱歉，刚才我意识到您要求区分大小写相等。（为什么我不阅读这个问题？:-）默认的 isEqual: 或 isEqualToString: 相等性应该已经区分大小写，这是什么情况？

There’s a caseInsensitiveCompare: method on NSString, why don’t you read the documentation? The method returns NSComparisonResult:

enum {
   NSOrderedAscending = -1,
   NSOrderedSame,
   NSOrderedDescending
};
typedef NSInteger NSComparisonResult;

…ah, sorry, just now I realized you are asking for case sensitive equality. (Why don’t I read the question? :-) The default isEqual: or isEqualToString: equality should already be case sensitive, what gives?

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許願樹丅啲祈禱 2024-10-15 03:08:37

以下是您需要比较字符串而不关心它是小写还是大写的代码：

if ([elementName caseInsensitiveCompare:@"Response"]==NSOrderedSame)
{
    //  Your "elementName" variable IS "Response", "response", "reSPonse", etc
    //  
}

Here's the code you would need to compare a string without caring about whether it's lowercase or uppercase:

if ([elementName caseInsensitiveCompare:@"Response"]==NSOrderedSame)
{
    //  Your "elementName" variable IS "Response", "response", "reSPonse", etc
    //  
}

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红墙和绿瓦 2024-10-15 03:08:37

实际上 isEqualToString: 具有区分大小写的能力。
as：

[elementName isEqualToString: @"Response"];

如果您想要求不区分大小写的比较，那么这里是代码：

您可以将两个可比字符串更改为小写或大写，并且可以比较为：

NSString *tempString = @"Response";
NSString *string1 = [elementName lowercaseString];
NSString *string2 =  [tempString lowercaseString];

//The same code changes both strings in lowerCase.
//Now You Can compare

if([string1 isEqualToString:string2])
{

//Type your code here

}

Actually isEqualToString: works with case sensitive ability.
as:

[elementName isEqualToString: @"Response"];

if you want to ask for case insensitive compare then here is the code:

You can change both comparable string to lowerCase or uppercase, and can compare as:

NSString *tempString = @"Response";
NSString *string1 = [elementName lowercaseString];
NSString *string2 =  [tempString lowercaseString];

//The same code changes both strings in lowerCase.
//Now You Can compare

if([string1 isEqualToString:string2])
{

//Type your code here

}

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温馨耳语 2024-10-15 03:08:37

NSString *string1 = @"stringABC";
NSString *string2 = @"STRINGDEF";
NSComparisonResult result = [string1 caseInsensitiveCompare:string2];

if (result == NSOrderedAscending) {
  NSLog(@"string1 comes before string2");
} else if (result == NSOrderedSame) {
  NSLog(@"We're comparing the same string");
} else if (result == NSOrderedDescending) {
   NSLog(@"string2 comes before string1");
}

NSString *string1 = @"stringABC";
NSString *string2 = @"STRINGDEF";
NSComparisonResult result = [string1 caseInsensitiveCompare:string2];

if (result == NSOrderedAscending) {
  NSLog(@"string1 comes before string2");
} else if (result == NSOrderedSame) {
  NSLog(@"We're comparing the same string");
} else if (result == NSOrderedDescending) {
   NSLog(@"string2 comes before string1");
}

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