NSTextViewでリッチテキストの書式設定をプログラムでココアで切り替える方法

Question

NSTextViewでリッチテキストの書式を切り替えたい。私は、次の試してみました：

[contentView setRichText:NO]; 
[contentView setImportsGraphics:NO]; 

しかし、NSTextViewの内容を変更し、まだテキストの書式を行うには許可しませんでした。

テキストエディットのようにNSTextViewでリッチテキストの書式を切り替える簡単な方法を教えてください。

"TextEdit"サンプルプロジェクトは既にチェックされていますが、そこから使用可能なコードを見つけるのは非常に難しいようです。

ありがとう

Answer 1

次のリンクからのヘルプがあります。上記のリンクで与えられたソリューションに基づいて

click here to see solution

次のように、私は私のビューコントローラのカテゴリを作成しました：

contentViewはNSTextViewのIBOutletある

#define TabWidth @"TabWidth" 

@interface MyViewController (Helper) 

- (NSDictionary *)defaultTextAttributes:(BOOL)forRichText; 
- (void)removeAttachments; 
- (void)setRichText:(BOOL)flag; 

@end 

@implementation MyViewController (Helper) 

- (NSDictionary *)defaultTextAttributes:(BOOL)forRichText { 
    static NSParagraphStyle *defaultRichParaStyle = nil; 
    NSMutableDictionary *textAttributes = [[[NSMutableDictionary alloc] initWithCapacity:2] autorelease]; 
    if (forRichText) { 
     [textAttributes setObject:[NSFont userFontOfSize:0.0] forKey:NSFontAttributeName]; 
     if (defaultRichParaStyle == nil) { // We do this once... 
      NSInteger cnt; 
      NSString *measurementUnits = [[NSUserDefaults standardUserDefaults] objectForKey:@"AppleMeasurementUnits"]; 
      CGFloat tabInterval = ([@"Centimeters" isEqual:measurementUnits]) ? (72.0/2.54) : (72.0/2.0); // Every cm or half inch 
      NSMutableParagraphStyle *paraStyle = [[[NSMutableParagraphStyle alloc] init] autorelease]; 
      [paraStyle setTabStops:[NSArray array]]; // This first clears all tab stops 
      for (cnt = 0; cnt < 12; cnt++) { // Add 12 tab stops, at desired intervals... 
       NSTextTab *tabStop = [[NSTextTab alloc] initWithType:NSLeftTabStopType location:tabInterval * (cnt + 1)]; 
       [paraStyle addTabStop:tabStop]; 
       [tabStop release]; 
      } 
      defaultRichParaStyle = [paraStyle copy]; 
     } 
     [textAttributes setObject:defaultRichParaStyle forKey:NSParagraphStyleAttributeName]; 
    } else { 
     NSFont *plainFont = [NSFont userFixedPitchFontOfSize:0.0]; 
     NSInteger tabWidth = [[NSUserDefaults standardUserDefaults] integerForKey:TabWidth]; 
     CGFloat charWidth = [@" " sizeWithAttributes:[NSDictionary dictionaryWithObject:plainFont forKey:NSFontAttributeName]].width; 
     if (charWidth == 0) charWidth = [[plainFont screenFontWithRenderingMode:NSFontDefaultRenderingMode] maximumAdvancement].width; 

     // Now use a default paragraph style, but with the tab width adjusted 
     NSMutableParagraphStyle *mStyle = [[[NSParagraphStyle defaultParagraphStyle] mutableCopy] autorelease]; 
     [mStyle setTabStops:[NSArray array]]; 
     [mStyle setDefaultTabInterval:(charWidth * tabWidth)]; 
     [textAttributes setObject:[[mStyle copy] autorelease] forKey:NSParagraphStyleAttributeName]; 

     // Also set the font 
     [textAttributes setObject:plainFont forKey:NSFontAttributeName]; 
    } 
    return textAttributes; 
} 

/* Used when converting to plain text 
*/ 
- (void)removeAttachments { 
    NSTextStorage *attrString = [contentView textStorage]; 
    NSUInteger loc = 0; 
    NSUInteger end = [attrString length]; 
    [attrString beginEditing]; 
    while (loc < end) { /* Run through the string in terms of attachment runs */ 
     NSRange attachmentRange; /* Attachment attribute run */ 
     NSTextAttachment *attachment = [attrString attribute:NSAttachmentAttributeName atIndex:loc longestEffectiveRange:&attachmentRange inRange:NSMakeRange(loc, end-loc)]; 
     if (attachment) { /* If there is an attachment and it is on an attachment character, remove the character */ 
      unichar ch = [[attrString string] characterAtIndex:loc]; 
      if (ch == NSAttachmentCharacter) { 
       if ([contentView shouldChangeTextInRange:NSMakeRange(loc, 1) replacementString:@""]) { 
        [attrString replaceCharactersInRange:NSMakeRange(loc, 1) withString:@""]; 
        [contentView didChangeText]; 
       } 
       end = [attrString length]; /* New length */ 
      } 
      else loc++; /* Just skip over the current character... */ 
     } 
     else loc = NSMaxRange(attachmentRange); 
    } 
    [attrString endEditing]; 
} 

- (void)setRichText:(BOOL)flag { 
    NSDictionary *textAttributes; 

    BOOL isRichText = flag; 

    if (!isRichText) [self removeAttachments]; 

    [contentView setRichText:isRichText]; 
    [contentView setUsesRuler:isRichText]; /* If NO, this correctly gets rid 
               of the ruler if it was up */ 
    if (isRichText && NO) 
     [contentView setRulerVisible:YES]; /* Show ruler if rich, and desired */ 
    [contentView setImportsGraphics:isRichText]; 

    textAttributes = [self defaultTextAttributes:isRichText]; 

    if ([[contentView textStorage] length]) { 
     [[contentView textStorage] setAttributes:textAttributes range: NSMakeRange(0,[[contentView textStorage] length])]; 
    } 
    [contentView setTypingAttributes:textAttributes]; 
} 

@end 

を。これが誰かを助けてくれるか、誰かがもっと短い方法を持っているかどうか私に知らせてほしい。

ありがとうございました