判断手机号码

+ (BOOL)validatePhone:(NSString *)phoneNumber
{
if (phoneNumber.length == 11 && [[phoneNumber substringToIndex:1] isEqualToString:@"1"])
{
// NSLog(@"[[phoneNumber substringToIndex:2] intValue] : %d",[[phoneNumber substringWithRange:NSMakeRange(1, 1)] intValue]);

if ([[phoneNumber substringWithRange:NSMakeRange(1, 1)] intValue] >2) { //第二位数字 应该大于2
return YES;
}else{
return NO;
}
}
else{
return NO;
}
}