# 5. Xcode工程结构

为了避免文件杂乱，物理文件应该保持和 Xcode 项目文件同步。Xcode 创建的任何组（group）都必须在文件系统有相应的映射。为了更清晰，代码不仅应该按照**类型**进行分组，也可以根据**功能**进行分组。

如果可以的话，尽可能一直打开 Target Build Settings 中 "`Treat Warnings as Errors`" 以及一些[额外的警告](http://boredzo.org/blog/archives/2009-11-07/warnings)。如果你需要忽略指定的警告,使用[Clang 的编译特性](http://clang.llvm.org/docs/UsersManual.html#controlling-diagnostics-via-pragmas)。

**目录结构参考**

* 按照类型分组

```
projectName/
    Resources                   图片等素材
    Sources                     代码
        /ViewController         控制器
        /Service                一些第三方比如支付宝，提供给controller的封装好的接口
        /External               引入的第三方库
        /Net                    网络请求
        /Model                  模型
        /Util                   工具类
        /Custom                 自定义的文件
            /Catergory          自定义的扩展类
            /Config             项目配置文件
            /View               视图
            /Util               工具类
```

* 按照功能分组

```
```


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