swift 报错 Call can throw, but it is not marked with 'try' and the error is not handled

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在开发中使用正则表达式时报了这样的问题:Call can throw, but it is not marked with ‘try‘ and the error is not handled,即:

let regex:NSRegularExpression = NSRegularExpression(pattern: "^1[3|4|5|7|8][0-9]{9}$", options: .caseInsensitive)

先看下在OC中的使用

  NSError *error = NULL;

    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"^1[3|4|5|7|8][0-9]{9}$" options:NSRegularExpressionCaseInsensitive error:&error];

    NSTextCheckingResult *result = [regex firstMatchInString:self options:0 range:NSMakeRange(0, [self length])];

  if (result) {

        return YES;

    }

    return NO;

对比一下发现原因是没有添加错误处理,可以通过添加try解决。

最终解决后代码:

  do{

            let regex:NSRegularExpression = try NSRegularExpression(pattern: "^1[3|4|5|7|8][0-9]{9}$", options: .caseInsensitive)

            let result:NSTextCheckingResult = regex.firstMatch(in: self, options:.reportProgress, range: NSMakeRange(0, self.count))!

            if result != nil {

                return true

            }

        }catch { }

        

        return false

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