Copy NSAttributedString in UIPasteBoard(在 UIPasteBoard 中复制 NSAttributedString)

本文介绍了在 UIPasteBoard 中复制 NSAttributedString的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

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).

I tried:

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

but this crash with:

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

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

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.

解决方案

Instead of involving HTML, the clean solution is to insert NSAttributedString 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 5

import MobileCoreServices

public extension UIPasteboard {
    func set(attributedString: NSAttributedString) {
        do {
            let rtf = try attributedString.data(from: NSMakeRange(0, attributedString.length), documentAttributes: [NSAttributedString.DocumentAttributeKey.documentType: NSAttributedString.DocumentType.rtf])
            items = [[kUTTypeRTF as String: NSString(data: rtf, encoding: String.Encoding.utf8.rawValue)!, kUTTypeUTF8PlainText as String: attributedString.string]]
        } catch {
        }
    }
}

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