如果文本存在于标签中，则在Xcode中 [英] If text exists in label, in Xcode

问题描述

好的，所以我想看看用户是否在其他单词中插入了一个单词，例如我希望用户打个招呼，但不仅仅是单词hi！例如：

Ok so I wanna see if the user has in putted a single word among other words like for example I want the user to say but not only the word hi! For example like this :

每个人都是XCoder，比如hi class。我想要一个if命令，它将扫描单词hi并删除它，如果它在那里，如果它不对文本做任何事情。

Everybody this is XCoder, say hi class. I want an if command that will scan for the word hi and delete it if it is there and if it is not do nothing to the text.

摘要：扫描特定文本，如果存在子串。或者删除，我很可能期望或期望一个（if）语句比其他任何东西更重要，因为这是一个静态标签，（改变）。

Summary : Scan for particular text, if exists substring it. or remove, I would most likely expecting or expecting a (if) statement more than anything else cause this is a static label, (changing).

推荐答案

从其他帖子引用..
关键是注意到rangeOfString：返回一个NSRange结构，文档说如果haystack不包含结构，它返回结构{NSNotFound，0} 针。

Referred from other post.. The key is noticing that rangeOfString: returns an NSRange struct, and the documentation says that it returns the struct {NSNotFound, 0} if the "haystack" does not contain the "needle".

 NSString *myString = @"Hi I am asking for help.";
    if ([string rangeOfString:@"Hi"].location == NSNotFound) {
      NSLog(@"%@",myString);
    } else {
      NSString *updated = [myString stringByReplacingOccurrencesOfString:@" am" withString:@""];
      NSLog(@"%@",updated);
    }

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