Question

我有短信，我想检查它是否包含文本“http”或其中存在的URL。

我该如何检查？

Answer 1

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
}

不区分大小写的示例：

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

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

Answer 2

@Cyprian提供了一个很好的选择。

您还可以考虑使用NSRegularExpression，这样可以提供更大的灵活性，假设您需要的是，例如如果你想匹配http：//和https：//。

Answer 3

网址通常包含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;
}

示例：

[yourString containsString:@"http"]

[yourString containsString:@"https"]

如何检查字符串是否包含URL

3 个答案: