验证
+ (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];
}
//手机号码验证
+ (BOOL) validateMobile:(NSString *)mobile
{
//手机号以13, 15,18开头,八个 \d 数字字符
NSString *phoneRegex = @"^((13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$";
NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];
return [phoneTest evaluateWithObject:mobile];
}
分组
NSString* test = @"abc";
NSString *regexString = @"a(?:\w)(\w)";
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:regexString options:NSRegularExpressionCaseInsensitive error:nil];
NSArray *matches = [regex matchesInString:test
options:0
range:NSMakeRange(0, [test length])];
if(matches.count==0){
//没有匹配上
}
for (NSTextCheckingResult *match in matches) {
NSString* group1 = [test substringWithRange:[match rangeAtIndex:1]];
NSLog(@"%@", group1);
}