本文轉載至?http://blog.csdn.net/zaitianaoxiang/article/details/6657231

application documentation types system string list

Adopting Uniform Type Identifiers采用統一類型標識符
Introduction to Uniform Type Identifiers Overview?統一類型標示符概述
Declaring New Uniform Type Identifiers聲明新的統一類型標示符

From the documentation:

If your application uses proprietary data formats, you should declare them in the Info.plist file of your application bundle. Some guidelines:

• Your UTI string must be unique. Following the reverse-DNS format beginning with com.companyName is a simple way to ensure uniqueness. While the system can support different UTI strings with the same specification, the reverse is not true.

• If your code relies on third-party UTI types that may not be present on the system, you should declare those UTIs as imported types in your bundle.

• Be sure to add conformance information if your proprietary type is a subtype of one or more existing types. In most cases you should not specify conformance to a nonpublic type, unless you are also declaring that type in your bundle. For a list of public and Apple-defined UTIs, see "System-Declared Uniform Type Identifiers"

如果你的應用程序用到專用的數據類型，你需要聲明他們在你的應用程序綁定的info.plist文件。

一些提示：

????? 你定義的統一類型標識 必須是特定的，隨著com.companyName反向DNS格式開始是一個簡單的方法，以確保其唯一性。雖然該系統可以支持不同的UTI的字符串按照同樣的規格，反之則不行。

??????如果你的代碼依賴第三方的UTI但是可能不存在于系統中，你應該聲明UTI為綁定的導入類型

??????如果您的專有類型是一個或多個現有類型的一個子型，則必須要添加一致性的信息，在大多數情況下，你不應該為非公有制類型指定一致性，除非你也聲明了此種類型在你的bundle中。

??????對于公眾和蘋果定義的UTI的列表，請參見“System-Declared Uniform Type Identifiers”

轉載于:https://www.cnblogs.com/Camier-myNiuer/p/3601794.html

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