Iphone 如何检查字符串是否包含URL

我有一条文本消息，我想检查它是否包含文本“http”或URL

我怎么检查

NSString *string = @"xxx http://someaddress.com";
NSString *substring = @"http:";

区分大小写的示例：

NSRange textRange = [string rangeOfString:substring];

if(textRange.location != NSNotFound){
    //Does contain the substring
}else{
    //Does not contain the substring
}

NSRange textRange = [[string lowercaseString] rangeOfString:[substring lowercaseString]];

if(textRange.location != NSNotFound){
    //Does contain the substring
}else{
    //Does not contain the substring
}

不区分大小写示例：

NSRange textRange = [string rangeOfString:substring];

if(textRange.location != NSNotFound){
    //Does contain the substring
}else{
    //Does not contain the substring
}

NSRange textRange = [[string lowercaseString] rangeOfString:[substring lowercaseString]];

if(textRange.location != NSNotFound){
    //Does contain the substring
}else{
    //Does not contain the substring
}

---

@塞浦路斯提供了一个很好的选择

---

您还可以考虑使用一个更灵活的Url，假设这是您所需要的，例如，如果您想匹配http://和https://的话。

Url通常包含http或https

您可以使用自定义方法containsString来检查这些字符串

- (BOOL)containsString:(NSString *)string {
    return [self containsString:string caseSensitive:NO];
}
- (BOOL)containsString:(NSString*)string caseSensitive:(BOOL)caseSensitive {
    BOOL contains = NO;
    if (![NSString isNilOrEmpty:self] && ![NSString isNilOrEmpty:string]) {
        NSRange range;
        if (!caseSensitive) {
            range =  [self rangeOfString:string options:NSCaseInsensitiveSearch];
        } else {
            range =  [self rangeOfString:string];
        }
        contains = (range.location != NSNotFound);
    }

    return contains;
}

例如：

[yourString containsString:@"http"]

[yourString containsString:@"https"]