将带有 NSTextAttachment 的 NSAttributedString 保存到文件中。如何？答案

【问题标题】：Saving NSAttributedString with NSTextAttachment into file. How to?将带有 NSTextAttachment 的 NSAttributedString 保存到文件中。如何？
【发布时间】：2012-06-27 15:05:46
【问题描述】：

我有一个NSTextView，它可能包含富文本或图像为NSTextAttachment 的富文本。还有就是我如何添加附件：

NSImage *image = [NSImage imageNamed:@"image"];

NSTextAttachmentCell *attachmentCell =[[NSTextAttachmentCell alloc] initImageCell:image];
NSTextAttachment *attachment =[[NSTextAttachment alloc] init];
[attachment setAttachmentCell: attachmentCell ];
NSAttributedString *attributedString =[NSAttributedString  attributedStringWithAttachment: attachment];
[[aTextView textStorage] beginEditing];
if ([aTextView shouldChangeTextInRange:NSMakeRange([aTextView selectedRange].location, 0) replacementString:@""]) {
    [[aTextView textStorage] insertAttributedString:attributedString atIndex:[aTextView selectedRange].location];
    [aTextView didChangeText];
}
[[aTextView textStorage] endEditing];

我的-fileWrapperOfType:error: 方法：

- (NSFileWrapper *)fileWrapperOfType:(NSString *)typeName error:(NSError *__autoreleasing *)outError
{
    NSRange documentRange = NSMakeRange(0, [[[WindowController aTextView] textStorage] length]);
    NSTextStorage *text = [[WindowController aTextView] textStorage];

    NSFileWrapper *resultWrapper = nil;
    if ([typeName compare:@"public.rtf"] == NSOrderedSame) {
        resultWrapper = [[NSFileWrapper alloc] initRegularFileWithContents:[text RTFFromRange:documentRange documentAttributes:[NSDictionary dictionaryWithObjectsAndKeys:NSRTFTextDocumentType, NSDocumentTypeDocumentAttribute, nil]]];
    }
    else if ([typeName compare:@"com.apple.rtfd"] == NSOrderedSame) {
        resultWrapper = [text RTFDFileWrapperFromRange:documentRange documentAttributes:[NSDictionary dictionaryWithObjectsAndKeys:NSRTFDTextDocumentType, NSDocumentTypeDocumentAttribute, nil]];
    }
    return resultWrapper;
}

但是当我保存 RTFD 时，所有附件都会丢失。请帮忙。我错过了什么？

【问题讨论】：

标签： objective-c cocoa nstextview nsattributedstring nstextattachment

【解决方案1】：

我找到了一个可以接受的解决方案，这里有描述：Cocoa: custom attachment in a text view

【讨论】：