电话或身份证中间用星号代替

   NSString *phone = [model.phone stringByReplacingOccurrencesOfString:[model.phone substringWithRange:NSMakeRange(3, 4)] withString:@"****"];    //   NSMakeRange(3, 4)  代表 从第三位开始 隐藏4个字符串

    [self.phoneBtn setTitle:phone forState:UIControlStateNormal];

 身份证号同样如此