在UIPasteBoard中复制NSAttributedString [英] Copy NSAttributedString in UIPasteBoard

问题描述

如何在粘贴板中复制NSAttributedString ，以允许用户粘贴或以编程方式粘贴（使用 - （void）paste：（id）sender ，来自UIResponderStandardEditActions协议）。

How do you copy an NSAttributedString in the pasteboard, to allow the user to paste, or to paste programmatically (with - (void)paste:(id)sender, from UIResponderStandardEditActions protocol).

我试过：

UIPasteboard *pasteBoard = [UIPasteboard generalPasteboard];
[pasteBoard setValue:attributedString forPasteboardType:(NSString *)kUTTypeRTF];

但这次崩溃的原因是：

-[UIPasteboard setValue:forPasteboardType:]: value is not a valid property list type'

这是预期的，因为NSAttributedString不是属性列表值。

which is to be expected, because NSAttributedString is not a property list value.

如果用户在我的应用程序中粘贴了粘贴板的内容，我会喜欢保留属性字符串的所有标准和自定义属性。

If the user paste the content of the pasteboard in my app, I would like to keep all the standards and custom attributes of the attributed string.

推荐答案

@ Guillaume使用HTML的方法对我不起作用（至少在iOS 7.1 beta 5中）。

@Guillaume's approach using HTML doesn't work for me (at least in iOS 7.1 beta 5).

更干净的解决方案是将NSAttributedStrings作为RTF（加上明文后备）插入粘贴板：

The cleaner solution is to insert NSAttributedStrings as RTF (plus plaintext fallback) into the paste board:

- (void)setAttributedString:(NSAttributedString *)attributedString {
    NSData *rtf = [attributedString dataFromRange:NSMakeRange(0, attributedString.length)
                               documentAttributes:@{NSDocumentTypeDocumentAttribute: NSRTFTextDocumentType}
                                            error:nil];
    self.items = @[@{(id)kUTTypeRTF: [[NSString alloc] initWithData:rtf encoding:NSUTF8StringEncoding],
                     (id)kUTTypeUTF8PlainText: attributedString.string}];
}

Swift 2.3

public extension UIPasteboard {
  public func set(attributedString: NSAttributedString?) {

    guard let attributedString = attributedString else {
      return
    }

    do {
      let rtf = try attributedString.dataFromRange(NSMakeRange(0, attributedString.length), documentAttributes: [NSDocumentTypeDocumentAttribute: NSRTFTextDocumentType])
      items = [[kUTTypeRTF as String: NSString(data: rtf, encoding: NSUTF8StringEncoding)!, kUTTypeUTF8PlainText as String: attributedString.string]]

    } catch {

    }
  }
}

Swift 3

import MobileCoreServices
public extension UIPasteboard {
  public func set(attributedString: NSAttributedString?) {

    guard let attributedString = attributedString else {
      return
    }

    do {
      let rtf = try attributedString.data(from: NSMakeRange(0, attributedString.length), documentAttributes: [NSDocumentTypeDocumentAttribute: NSRTFTextDocumentType])
      items = [[kUTTypeRTF as String: NSString(data: rtf, encoding: String.Encoding.utf8.rawValue)!, kUTTypeUTF8PlainText as String: attributedString.string]]

    } catch {

    }
  }
}

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