**一蹂喻、iOS中有三種方式來(lái)實(shí)現(xiàn)正則表達(dá)式的匹配。現(xiàn)在將他們都記錄在這里：
**1.利用NSPredicate（謂詞）匹配
**例如匹配有效郵箱：
NSString *email ＝ @“nijino_saki@163.com”兄旬；
NSString *regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
BOOL isValid = [predicate evaluateWithObject:email];
謂詞匹配比較靈活潘鲫，但是需要有謂詞的相關(guān)知識(shí)女揭。
2.利用rangeOfString：option：直接查找
NSString *searchText = @"http:// Do any additional setup after loading the view, typically from a nib.";
NSRange range = [searchText rangeOfString:@"(?:[^,])*\\." options:NSRegularExpressionSearch];
if (range.location != NSNotFound)
{
NSLog(@"%@", [searchText substringWithRange:range]);
}
options中設(shè)定NSRegularExpressionSearch就是表示利用正則表達(dá)式匹配，會(huì)返回第一個(gè)匹配結(jié)果的位置趴腋。
3.使用正則表達(dá)式類
NSString *searchText = @"http://Do any additional setup after loading the view, typically from a nib.";
NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(?:[^,])*\\."options:NSRegularExpressionCaseInsensitive
error:&error];
NSTextCheckingResult *result = [regex firstMatchInString:searchText options:0range:NSMakeRange(0,
[searchText length])];
if(result)
{
NSLog(@"%@\n",
[searchText substringWithRange:result.range]);
}
二吊说、使用系統(tǒng)的正則表達(dá)式類（NSRegularExpression）會(huì)返回匹配的多個(gè)結(jié)果。
實(shí)例：
1.驗(yàn)證郵箱
+ (BOOL)validateEmail:(NSString *)email
{
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:email];
}
NSPredicate是一個(gè)Foundation類优炬，是用來(lái)查詢的颁井，原理和用法都類似于SQL中的where。
2.驗(yàn)證手機(jī)號(hào)
簡(jiǎn)單的判斷方法
+(BOOL)validatePhone:(NSString *)phone
{
NSString *phoneRegex = @"1[3|5|7|8|][0-9]{9}";
NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", phoneRegex];
return [phoneTest evaluateWithObject:phone];
}
這只是簡(jiǎn)單地判斷手機(jī)號(hào)格式蠢护。其實(shí)手機(jī)的格式還是有一點(diǎn)復(fù)雜的雅宾。
詳細(xì)的判斷方法
//正則判斷手機(jī)號(hào)碼格式
+(BOOL)validatePhone:(NSString *)phone
{
/**
*
手機(jī)號(hào)碼
*
移動(dòng)：134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
*
聯(lián)通：130,131,132,152,155,156,185,186
*
電信：133,1349,153,180,189
*/
NSString
* MOBILE = @"^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$";
/**
*
中國(guó)移動(dòng)：China Mobile
*
134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
*/
NSString * CM = @"^1(34[0-8]|(3[5-9]|5[017-9]|8[278])\\d)\\d{7}$";
/**
*
中國(guó)聯(lián)通：China Unicom
*
130,131,132,152,155,156,185,186
*/
NSString * CU = @"^1(3[0-2]|5[256]|8[56])\\d{8}$";
/**
*
中國(guó)電信：China Telecom
*
133,1349,153,180,189
*/
NSString * CT = @"^1((33|53|8[09])[0-9]|349)\\d{7}$";
/**
*
大陸地區(qū)固話及小靈通
*
區(qū)號(hào)：010,020,021,022,023,024,025,027,028,029
*
號(hào)碼：七位或八位
*/
//
NSString * PHS = @"^0(10|2[0-5789]|\\d{3})\\d{7,8}$";
NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE];
NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM];
NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU];
NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT];
if
(([regextestmobile evaluateWithObject:phone] == YES)
||
([regextestcm evaluateWithObject:phone] == YES)
||
([regextestct evaluateWithObject:phone] == YES)
||
([regextestcu evaluateWithObject:phone] == YES))
{
if([regextestcm evaluateWithObject:phone] == YES) {
NSLog(@"China Mobile");
}
else if([regextestct evaluateWithObject:phone] == YES) {
NSLog(@"China Telecom");
}
else if ([regextestcu evaluateWithObject:phone] == YES) {
NSLog(@"China Unicom");
}
else {
NSLog(@"Unknow");
}
return YES;
}
else
{
return NO;
}
}
