以前做驗證郵箱,電話號碼的時候通常用第三方的正則表達式或者NSPredicate(點這裏查看以前的文章),在後期,蘋果推出了自己的正則表達式來提供給開發者調用,很方便,功能也強大.
具體可以查看官方文檔,包括如何書寫進行匹配的正則表達式例子,這裏我就不多加詳述了,因爲本人看那一堆符號好煩.....只好直接求助於谷歌了,下面只給出幾個常用的.
#define KPhoneRegex @"\\d{3}-\\d{8}|\\d{3}-\\d{7}|\\d{4}-\\d{8}|\\d{4}-\\d{7}|1+[358]+\\d{9}|\\d{8}|\\d{7}"
#define KWebRegex @"((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)"
#define KWebOtherRegex @"http+:[^\\s]*"
#define KEmailRegex @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"/**
1. 返回所有匹配結果的集合(適合,從一段字符串中提取我們想要匹配的所有數據)
* - (NSArray *)matchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;
2. 返回正確匹配的個數(通過等於0,來驗證郵箱,電話什麼的,代替NSPredicate)
* - (NSUInteger)numberOfMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;
3. 返回第一個匹配的結果。注意，匹配的結果保存在 NSTextCheckingResult 類型中
* - (NSTextCheckingResult *)firstMatchInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;
4. 返回第一個正確匹配結果字符串的NSRange
* - (NSRange)rangeOfFirstMatchInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;
5. block方法
* - (void)enumerateMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range usingBlock:(void (^)(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop))block;
*/
/**
* enum {
NSRegularExpressionCaseInsensitive = 1 << 0, // 不區分大小寫的
NSRegularExpressionAllowCommentsAndWhitespace = 1 << 1, // 忽略空格和# -
NSRegularExpressionIgnoreMetacharacters = 1 << 2, // 整體化
NSRegularExpressionDotMatchesLineSeparators = 1 << 3, // 匹配任何字符，包括行分隔符
NSRegularExpressionAnchorsMatchLines = 1 << 4, // 允許^和$在匹配的開始和結束行
NSRegularExpressionUseUnixLineSeparators = 1 << 5, // (查找範圍爲整個的話無效)
NSRegularExpressionUseUnicodeWordBoundaries = 1 << 6 // (查找範圍爲整個的話無效)
};
typedef NSUInteger NSRegularExpressionOptions;
*/
// 下面2個枚舉貌似都沒什麼意義,除了在block方法中,一般情況下,直接給0吧
/**
* enum {
NSMatchingReportProgress = 1 << 0,
NSMatchingReportCompletion = 1 << 1,
NSMatchingAnchored = 1 << 2,
NSMatchingWithTransparentBounds = 1 << 3,
NSMatchingWithoutAnchoringBounds = 1 << 4
};
typedef NSUInteger NSMatchingOptions;
*/
/** 此枚舉值只在5.block方法中用到
* enum {
NSMatchingProgress = 1 << 0,
NSMatchingCompleted = 1 << 1,
NSMatchingHitEnd = 1 << 2,
NSMatchingRequiredEnd = 1 << 3,
NSMatchingInternalError = 1 << 4
};
typedef NSUInteger NSMatchingFlags;
*/
// 測試字符串，把裏面的電話號碼解析出來
NSString *urlString = @"哈哈哈哈呵呵呵s15279107723在這裏啊啊啊啊s15279107716";
NSError *error = NULL;
// 根據匹配條件,創建了一個正則表達式(類方法,實例方法類似)
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:KPhoneRegex options:NSRegularExpressionCaseInsensitive error:&error];
if (regex != nil) {
// 3.....
NSTextCheckingResult *firstMatch = [regex firstMatchInString:urlString
options:0
range:NSMakeRange(0, [urlString length])];
if (firstMatch) {
NSRange resultRange = [firstMatch rangeAtIndex:0];
//從urlString中截取數據
NSString *result = [urlString substringWithRange:resultRange];
NSLog(@"result = %@",result);
}
// 2.....
NSUInteger number = [regex numberOfMatchesInString:urlString
options:0
range:NSMakeRange(0, [urlString length])];
NSLog(@"number = %ld",number);
// 5.....(坑爹的返回第一個匹配結果)
[regex enumerateMatchesInString:urlString options:0 range:NSMakeRange(0, [urlString length]) usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
NSLog(@"---%@",NSStringFromRange([result range]));
if (flags != NSMatchingInternalError) {
NSRange firstHalfRange = [result rangeAtIndex:0];
if (firstHalfRange.length > 0) {
NSString *resultString1 = [urlString substringWithRange:firstHalfRange];
NSLog(@"result1 = %@",resultString1);
}
}
*stop = YES;
}];
}
// 替換掉你要匹配的字符串
NSString *reString = [regex stringByReplacingMatchesInString:urlString
options:0
range:NSMakeRange(0, [urlString length])
withTemplate:@"(我就是替換的值)"];
NSLog(@"reString = %@",reString);
// 還有2個方法大家可以去嘗試看看
// 1.
NSMutableArray *oneArray = [self _matchLinkWithStr:urlString withMatchStr:KPhoneRegex];
for (NSString *phone in oneArray) {
NSLog(@"phone = %@",phone);
}
// 1.....
- (NSMutableArray *)_matchLinkWithStr:(NSString *)str withMatchStr:(NSString *)matchRegex;
{
NSError *error = NULL;
NSRegularExpression *reg = [NSRegularExpression regularExpressionWithPattern:matchRegex
options:NSRegularExpressionCaseInsensitive
error:&error];
NSArray *match = [reg matchesInString:str
options:NSMatchingReportCompletion
range:NSMakeRange(0, [str length])];
NSMutableArray *rangeArr = [NSMutableArray array];
// 取得所有的NSRange對象
if(match.count != 0)
{
for (NSTextCheckingResult *matc in match)
{
NSRange range = [matc range];
NSValue *value = [NSValue valueWithRange:range];
[rangeArr addObject:value];
}
}
// 將要匹配的值取出來,存入數組當中
__block NSMutableArray *mulArr = [NSMutableArray array];
[rangeArr enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
NSValue *value = (NSValue *)obj;
NSRange range = [value rangeValue];
[mulArr addObject:[str substringWithRange:range]];
}];
return mulArr;
}
@結果:
