手机号码中间四位用*代替

// 验证手机号码，中间用****代替
-  (NSString *)numberSuitScanf:(NSString*)number{

NSMutableString *phoneStr = [NSMutableString stringWithString:number];

NSString *regex = @"^((13[0-9])|(147)|(15[^4,\\D])|(18[0,5-9]))\\d{8}$";
NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

// 判断当前字符串是否为手机号
BOOL isMatch = [pred evaluateWithObject:phoneStr];
if (isMatch) {
[phoneStr replaceCharactersInRange:NSMakeRange(3, 4) withString:@"****"];
}

return [NSString stringWithString:phoneStr];
}