iOS8：UIDocumentPickerViewController获取NSData [英] iOS8: UIDocumentPickerViewController get NSData

问题描述

我已根据 UIDocumentPickerViewController 访问文档/ AccessingDocuments.htmlrel =nofollow>文档，现在尝试从委托方法中的挑选文件中获取NSData，但 [[NSData alloc] initWithContentsOfURL：] 返回nil：

I have implement UIDocumentPickerViewController according docs and now trying to get NSData from picked file in delegate method, but [[NSData alloc] initWithContentsOfURL:] returns nil:

- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentAtURL:(NSURL *)url{
    NSData* documentData = [[NSData alloc] initWithContentsOfURL:url];
    //documentData is nil
    documentData = [[NSData alloc] initWithContentsOfFile:[url path]];
    //documentData is still nil :(
}

我正在使用Xcode6 beta6，iPhone模拟器，文档选择器模式是 UIDocumentPickerModeImport 。
尝试检索保存到iCloude Drive的文档。

I'm using Xcode6 beta6, iPhone simulator, document picker mode is UIDocumentPickerModeImport. Trying to retrieve documents saved to iCloude Drive.

推荐答案

问题是实际的页面文档（* .pages）不是文件，而是文件夹。所以当我试图从文件夹路径获取NSData时，它返回nil。

The problem was that actually Page documents (*.pages) are not files, but folders. So when I have tried to get NSData from folders path it returns nil.

默认Mail.app将文档作为zip存档附加。

Default Mail.app attaches documents as zip archives.

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