NSRegularExpression使用

使用正则式匹配NSRegularExpression

- (void)regularMethod{
    
    NSString *string = @"hsrjtosmtdetail:id=112110&goodsid=123456789&sourcetype=1";  //格式
    NSString *regxStr = @":id=(\\d)+|type=(\\d)|goodsid=(\\d)+";  //正则式
    NSError *error;
    NSRegularExpression *regular = [NSRegularExpression regularExpressionWithPattern:regxStr options:NSRegularExpressionCaseInsensitive error:&error];
    if (error) {
        NSLog(@"error=%@",error);
        return;
    }
    __block NSString *ID;
    __block NSString *goodsID;
    [regular enumerateMatchesInString:string options:NSMatchingReportCompletion range:NSMakeRange(0, string.length) usingBlock:^(NSTextCheckingResult * _Nullable result, NSMatchingFlags flags, BOOL * _Nonnull stop) {
        NSRange matchRange = result.range;
        if (matchRange.length && matchRange.location) {
            NSString *str = [string substringWithRange:matchRange];
            if ([str containsString:@":id"]) {
                ID = [str substringFromIndex:4];
            }else if ([str containsString:@"goodsid="]){
                goodsID = [str substringFromIndex:8];
            }
        }
    }];
    NSLog(@"id=%@  %@",ID,goodsID);  //输出id=112110  123456789
}

其他

- (BOOL)validateString:(NSString *)string withPattern:(NSString *)pattern{
    
    NSError *error = NULL;
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:&error];
    
    NSRange textRange = NSMakeRange(0, string.length);
    
    //1.返回第一个正确匹配结果字符串的NSRange
    NSRange matchRange = [regex rangeOfFirstMatchInString:string options:NSMatchingReportProgress range:textRange];
    NSLog(@"%@",NSStringFromRange(matchRange));//{3, 2}
    
    //2.返回第一个匹配的结果,结果保存在 NSTextCheckingResult
    NSTextCheckingResult *textCheck = [regex firstMatchInString:string options:NSMatchingReportProgress range:textRange];
    NSLog(@"%@",NSStringFromRange(textCheck.range));//{3, 2}
    
    //3.返回匹配个数
    NSUInteger number = [regex numberOfMatchesInString:string options:NSMatchingReportProgress range:textRange];
    NSLog(@"%lu",(unsigned long)number);//2
    
    //4.返回所有匹配的结果
    NSArray<NSTextCheckingResult *> *results = [regex matchesInString:string options:NSMatchingReportProgress range:textRange];
    NSLog(@"%@",results);
    //"<NSSimpleRegularExpressionCheckingResult: 0x60800007c580>{3, 2}{<NSRegularExpression: 0x60000004e6a0> L[A-C] 0x1}",
    //"<NSSimpleRegularExpressionCheckingResult: 0x60800007c040>{8, 2}{<NSRegularExpression: 0x60000004e6a0> L[A-C] 0x1}"
    
    //5.
    [regex enumerateMatchesInString:string options:0 range:textRange usingBlock:^(NSTextCheckingResult * _Nullable result, NSMatchingFlags flags, BOOL * _Nonnull stop) {
        NSLog(@"%@",result);
    }];
    //"<NSSimpleRegularExpressionCheckingResult: 0x60800007c580>{3, 2}{<NSRegularExpression: 0x60000004e6a0> L[A-C] 0x1}",
    //"<NSSimpleRegularExpressionCheckingResult: 0x60800007c040>{8, 2}{<NSRegularExpression: 0x60000004e6a0> L[A-C] 0x1}"
    
    //6.替换匹配的值
    NSString *newString = [regex stringByReplacingMatchesInString:string options:0 range:textRange withTemplate:@"Replace-100"];
    NSLog(@"new str:%@",newString);//new str:w29Replace-100jswReplace-100nkow
    
    BOOL didValidate = NO;
    if (matchRange.location != NSNotFound)
        didValidate = YES;
    
    return didValidate;
}