NSTextCheckingResult用于电话号码 [英] NSTextCheckingResult for phone numbers

问题描述

有人可以告诉我为什么每次评估为真？？

Can someone tell me why this evaluates every time to true?!

输入为： jkhkjhkj 。我在电话字段中键入的内容无关紧要。每次都是真的......

The input is: jkhkjhkj. It doesn't matter what I type into the phone field. It's every time true...

NSRange range = NSMakeRange (0, [phone length]);    
NSTextCheckingResult *match = [NSTextCheckingResult phoneNumberCheckingResultWithRange:range phoneNumber:phone];
if ([match resultType] == NSTextCheckingTypePhoneNumber)
{
    return YES;
}
else 
{
    return NO;
}

这是匹配：

(NSTextCheckingResult *) $4 = 0x0ab3ba30 <NSPhoneNumberCheckingResult: 0xab3ba30>{0, 8}{jkhkjhkj}

我使用的是RegEx和 NSPredicate 但是我我读过，因为iOS4建议使用 NSTextCheckingResult ，但我找不到任何好的教程或示例。

I was using RegEx and NSPredicate but I've read that since iOS4 it's recommended to use NSTextCheckingResult but I can't find any good tutorials or examples on this.

提前致谢！

推荐答案

您正在错误地使用该课程。 NSTextCheckingResult 是文本检查的结果，由 NSDataDetector 或 NSRegularExpression 。改为使用 NSDataDetector ：

You are using the class incorrectly. NSTextCheckingResult is the result of a text checking that is done by NSDataDetector or NSRegularExpression. Use NSDataDetector instead:

NSError *error = NULL;
NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypePhoneNumber error:&error];

NSRange inputRange = NSMakeRange(0, [phone length]);
NSArray *matches = [detector matchesInString:phone options:0 range:inputRange];

// no match at all
if ([matches count] == 0) {
    return NO;
}

// found match but we need to check if it matched the whole string
NSTextCheckingResult *result = (NSTextCheckingResult *)[matches objectAtIndex:0];

if ([result resultType] == NSTextCheckingTypePhoneNumber && result.range.location == inputRange.location && result.range.length == inputRange.length) {
    // it matched the whole string
    return YES;
}
else {
    // it only matched partial string
    return NO;
}

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