判定是不是手机号码

-(BOOL)regexTel

{

if ( self == nil || [self length] == 0 )

{

return NO;

}

NSString *regex = @"^((13[0-9])|(14[0-9])|(15[0-9])|(17[6-8])|(1705)|(1709)|(18[0-9]))\\d{8}$";

NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

return [pred evaluateWithObject:self];

}

self:NSString