NSRange сбой с длинной строкой - PullRequest
Новая
       85

NSRange сбой с длинной строкой

0 голосов
/ 13 октября 2018

У меня есть атрибутная строка, которую я хочу разделить, чтобы я мог использовать ее в табличном представлении.Каждый из этих элементов в табличном представлении имеет заголовок и некоторый контент.Код работает нормально, когда строковый файл меньше 100 КБ, но падает, если файл больше этого.

Приписанная строка выглядит так: 

###Title###
Foobar some title{
    NSColor = "kCGColorSpaceModelMonochrome 0.37475 1 ";
    NSFont = "<UICTFont: 0x7b7f2ea0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    \"28.3L\",\n    \"56.65L\",\n    85L,\n    \"113.35L\",\n    \"141.7L\",\n    \"170.05L\",\n    \"198.4L\",\n    \"226.75L\",\n    \"255.1L\",\n    \"283.45L\",\n    \"311.8L\",\n    \"340.15L\"\n), DefaultTabInterval 36, Blocks (null), Lists (\n), BaseWritingDirection -1, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
}
{
    NSColor = "kCGColorSpaceModelRGB 1 0 0 1 ";
    NSFont = "<UICTFont: 0x7b7f2ea0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    \"28.3L\",\n    \"56.65L\",\n    85L,\n    \"113.35L\",\n    \"141.7L\",\n    \"170.05L\",\n    \"198.4L\",\n    \"226.75L\",\n    \"255.1L\",\n    \"283.45L\",\n    \"311.8L\",\n    \"340.15L\"\n), DefaultTabInterval 36, Blocks (null), Lists (\n), BaseWritingDirection -1, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
}###Content###
{
    NSColor = "kCGColorSpaceModelMonochrome 0.37475 1 ";
    NSFont = "<UICTFont: 0x7b7f2ea0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    \"28.3L\",\n    \"56.65L\",\n    85L,\n    \"113.35L\",\n    \"141.7L\",\n    \"170.05L\",\n    \"198.4L\",\n    \"226.75L\",\n    \"255.1L\",\n    \"283.45L\",\n    \"311.8L\",\n    \"340.15L\"\n), DefaultTabInterval 36, Blocks (null), Lists (\n), BaseWritingDirection -1, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
}BarFoo some content{
    NSColor = "kCGColorSpaceModelMonochrome 0.37475 1 ";
    NSFont = "<UICTFont: 0x7b7f2ea0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    \"28.3L\",\n    \"56.65L\",\n    85L,\n    \"113.35L\",\n    \"141.7L\",\n    \"170.05L\",\n    \"198.4L\",\n    \"226.75L\",\n    \"255.1L\",\n    \"283.45L\",\n    \"311.8L\",\n    \"340.15L\"\n), DefaultTabInterval 36, Blocks (null), Lists (\n), BaseWritingDirection 0, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
}
{
    NSColor = "kCGColorSpaceModelRGB 0.99216 0.60392 0 1 ";
    NSFont = "<UICTFont: 0x7b7f2ea0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    \"28.3L\",\n    \"56.65L\",\n    85L,\n    \"113.35L\",\n    \"141.7L\",\n    \"170.05L\",\n    \"198.4L\",\n    \"226.75L\",\n    \"255.1L\",\n    \"283.45L\",\n    \"311.8L\",\n    \"340.15L\"\n), DefaultTabInterval 36, Blocks (null), Lists (\n), BaseWritingDirection 0, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
}###End###{
    NSColor = "kCGColorSpaceModelMonochrome 0.37475 1 ";
    NSFont = "<UICTFont: 0x7b7f2ea0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    \"28.3L\",\n    \"56.65L\",\n    85L,\n    \"113.35L\",\n    \"141.7L\",\n    \"170.05L\",\n    \"198.4L\",\n    \"226.75L\",\n    \"255.1L\",\n    \"283.45L\",\n    \"311.8L\",\n    \"340.15L\"\n), DefaultTabInterval 36, Blocks (null), Lists (\n), BaseWritingDirection -1, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
}

И представление необработанной строки выглядиткак это: 

###Title###
Foobar some title
###Content###
BarFoo some content
###End###

Мой код: 

struct WatchItem {
    let attributedTitle: NSAttributedString
    let attributedContent: NSAttributedString
}

class func splitAttributedString(attributedString: NSAttributedString) -> [WatchItem] {

    var attributedString = attributedString
    var string = attributedString.string
    var items = [WatchItem]()

    while true {
        guard let titleRange = string.range(of: "###Title###") else { break }
        guard let contentRange = string.range(of: "###Content###") else { break }
        guard let endRange = string.range(of: "###End###") else { break }

        guard contentRange.lowerBound > titleRange.upperBound,
            endRange.lowerBound > contentRange.upperBound else {
            items.append(getErrorItem())
            break
        }

        let titleNSRange = NSRange(titleRange.upperBound..<contentRange.lowerBound, in: string)
        let title = attributedString.attributedSubstring(from: titleNSRange)

        let contentNSRange = NSRange(contentRange.upperBound..<endRange.lowerBound, in: string)
        let content = attributedString.attributedSubstring(from: contentNSRange)

        let item = WatchItem(attributedTitle: title, attributedContent: content)
        items.append(item)

        print("-----------")
        print(title)
        print(content)
        print("-----------")

        let restNSRange = NSRange(endRange.upperBound..<string.endIndex, in: string)

        //Shorten the strings to iterate over them again
        attributedString = attributedString.attributedSubstring(from: restNSRange)

        //This line crashes
        string = String(string[endRange.upperBound..<string.endIndex])
    }
    return items
}

class func getErrorItem() -> WatchItem {
    return WatchItem(attributedTitle: NSAttributedString(string: "Something went wrong with your formatting"), attributedContent: NSAttributedString(string: "Please check the syntax.\n\n ###Title###\nYour Title\n###Content###\nYour Content\n###End###"))
}

Таким образом, код отлично работает при использовании достаточного количества этих атрибутных строк.Но когда строка становится слишком длинной, я получаю исключение EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0).

Может кто-нибудь сказать мне, что мне не хватает или в чем проблема с моим кодом?

...