在小牛上继承NSTextStorage时与范围相关的异常

Question

我的应用程序使用我自己的NSTextStorage的子类，并且一切正常，直到Mavericks。即使使用最精简的版本，只要我用它初始化文本视图，我就会得到一个异常。我阅读了文档，也看了一下How to extend NSTextStorage?。希望你们中的一位知道苹果是否改变了一些事情，或者如果我做错了什么。

信息，你可能需要帮我：

例外：

TextViewCheck [12542：303]：异常*** NSRunStorage（0x6000000a4200），_replaceElements（）：替换范围{0,929}将 延伸超出当前运行存储大小928.在排版布局管理器期间引发 NSLayoutManager：0x100106a80
1容器，文本备份g有928个字符 所选字符范围{0，0}亲和力：上游粒度：字符 标记字符范围{0,0} 当前拥有928个字形。
字形树内容：928个字符，928个字形，1个节点，64个节点字节，960个 存储字节，1024个总字节，每个字符1.10个字节，每个字形1.10个字节 布局树内容：928个字符，928个字形，字符0，放置行 片段，1个节点，64个节点字节，0个存储字节，64个总字节，0.07个字节每个字符 ，每个字形0.07个字节，每个放置线段的0.00个放置字形， 每个放置线段的0.00字节 ，字形范围{0 928}。忽略...

回溯

thread #1: tid = 0x137013, 0x00007fff8ad7e44e AppKit`_NSGlyphTreeGetGlyphsInRange + 1179, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=1, address=0x1002c0000) 

frame #0: 0x00007fff8ad7e44e AppKit`_NSGlyphTreeGetGlyphsInRange + 1179 
frame #1: 0x00007fff8ad7dfa1 AppKit`-[NSLayoutManager getGlyphsInRange:glyphs:characterIndexes:glyphInscriptions:elasticBits:bidiLevels:] + 92 
frame #2: 0x00007fff8ad4d8b6 AppKit`-[NSATSGlyphStorage setGlyphRange:characterRange:] + 3724 
frame #3: 0x00007fff8ad4c8be AppKit`-[NSATSTypesetter _ctTypesetter] + 306 
frame #4: 0x00007fff8ad4baf9 AppKit`-[NSATSLineFragment layoutForStartingGlyphAtIndex:characterIndex:minPosition:maxPosition:lineFragmentRect:] + 85 
frame #5: 0x00007fff8ad4a64e AppKit`-[NSATSTypesetter _layoutLineFragmentStartingWithGlyphAtIndex:characterIndex:atPoint:renderingContext:] + 2777 
frame #6: 0x00007fff8ad7dc79 AppKit`-[NSATSTypesetter layoutParagraphAtPoint:] + 149 
frame #7: 0x00007fff8b3f5b45 AppKit`-[NSTypesetter _layoutGlyphsInLayoutManager:startingAtGlyphIndex:maxNumberOfLineFragments:maxCharacterIndex:nextGlyphIndex:nextCharacterIndex:] + 4043 
frame #8: 0x00007fff8ad7cc9d AppKit`-[NSTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments:] + 202 
frame #9: 0x00007fff8ad7cb81 AppKit`-[NSATSTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments:] + 1107 
frame #10: 0x00007fff8ad7b219 AppKit`-[NSLayoutManager(NSPrivate) _fillLayoutHoleForCharacterRange:desiredNumberOfLines:isSoft:] + 1306 
frame #11: 0x00007fff8ae24ad9 AppKit`_NSFastFillAllLayoutHolesForGlyphRange + 1435 
frame #12: 0x00007fff8ae6ddbd AppKit`-[NSLayoutManager(NSPrivate) _firstPassGlyphRangeForBoundingRect:inTextContainer:okToFillHoles:] + 309 
frame #13: 0x00007fff8ae6cea4 AppKit`-[NSLayoutManager(NSPrivate) _glyphRangeForBoundingRect:inTextContainer:fast:okToFillHoles:] + 875 
frame #14: 0x00007fff8add81b2 AppKit`-[NSTextView setNeedsDisplayInRect:avoidAdditionalLayout:] + 1466 
frame #15: 0x00007fff8acb4222 AppKit`-[NSView setNeedsDisplay:] + 81 
frame #16: 0x00007fff8add68d9 AppKit`-[NSTextView setTextContainer:] + 699 
frame #17: 0x00007fff8add651a AppKit`-[NSTextContainer setTextView:] + 263 
... 

代码：

TTTSimpleTextStorage.m

@implementation TTTSimpleTextStorage 

- (id)initWithAttributedString:(NSAttributedString *)attrStr { 
    if (self = [super init]) { 
     contents = attrStr ? [attrStr mutableCopy] : 
     [[NSMutableAttributedString alloc] init]; 
    } 
    return self; 
} 


- init { 
    return [self initWithAttributedString:nil]; 
} 

- (NSString *)string { 
    return [contents string]; 
} 

- (NSDictionary *)attributesAtIndex:(NSUInteger)location 
       effectiveRange:(NSRange *)range { 
    return [contents attributesAtIndex:location effectiveRange:range]; 
} 

- (void)replaceCharactersInRange:(NSRange)range withString:(NSString 
                 *)str { 
    NSInteger origLen = [self length]; 
    [contents replaceCharactersInRange:range withString:str]; 
    [self edited:NSTextStorageEditedCharacters range:range 
      changeInLength:[self length] - origLen]; 
} 

- (void)setAttributes:(NSDictionary *)attrs range:(NSRange)range { 
    [contents setAttributes:attrs range:range]; 
    [self edited:NSTextStorageEditedCharacters range:range 
     changeInLength:0]; 
} 

@end 

我如何使用它

这是MainWindowController - awakeFromNib，窗口IBOutlet中有一个的NSView作为子视图命名容器和一个随机字符串字符串1

nts1 = [[TTTSimpleTextStorage alloc] initWithString:string1]; 

NSLayoutManager* lm1 = [[NSLayoutManager alloc] init]; 
[nts1 addLayoutManager:lm1]; 

NSTextContainer* tc1 = [[NSTextContainer alloc] initWithContainerSize:NSMakeSize(400, 280)]; 
[lm1 addTextContainer:tc1]; 


tv1 = [[NSTextView alloc] initWithFrame:NSMakeRect(40, 20, 400, 280) textContainer:tc1]; // here it crashes 

[self.container addSubview:tv1]; 
[self.window makeKeyAndOrderFront:nil]; 
[self.window makeFirstResponder:tv1]; 

Answer 1

在replaceCharactersInRange，要设置origLen到[自身长度]，并且一行之后，您将通过[自身长度]减去origLen来计算changeInLength，这是有效的：

NSInteger origLen = self.length; 
// ... 
changeInLength: origLen - self.length 

我觉得你宁愿：

changeInLength: self.length - str.length];