在iPhone上找到用户的Documents目录的最好方法是什么？

问题描述

我在阅读Erica Sadun的iPhone开发人员食谱，遇到了一个问题。

她在书中说，找到用户的Documents目录是与代码：

  [NSHomeDirectory（）stringByAppendingPathComponent：@Documents]; 
  

但是这看起来有点脆弱，并且对正常的Mac方式不太熟悉，

  NSSearchPathForDirectoriesInDomains（NSDocumentsDirectory，NSUserDomainMask，YES）; 
  

有什么特别的理由使用另一个吗？

  NSArray * paths = NSSearchPathForDirectoriesInDomains（NSDocumentDirectory， NSUserDomainMask，YES）
  

Swift：

  var paths = NSSearchPathForDirectoriesInDomains（NSSearchPathDirectory.DocumentDirectory，NSSearchPathDomainMask.UserDomainMask，true）
  

您将需要返回数组的第一个元素。

I'm reading Erica Sadun's iPhone Developer's Cookbook, and ran into a question.

She says in the book that the way to find the user's Documents directory is with the code:

[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

but that seems slightly brittle, and dissimiliar to the normal Mac way of doing it, which would be:

NSSearchPathForDirectoriesInDomains(NSDocumentsDirectory, NSUserDomainMask, YES);

Are there any particular reasons to use one over the other?

解决方案

Objc:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)

Swift:

var paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)

You'll want the first element of the returned array.

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