NSTextView-对表使用initWithHTML

修改 Apple's sample code for programmatically adding tables to NSAttributedString :

- (NSMutableAttributedString *) printTitleTableAttributedString
{
    NSMutableAttributedString *tableString = [[NSMutableAttributedString alloc] initWithString:@"\n\n"];
    NSTextTable *table = [[NSTextTable alloc] init];
    [table setNumberOfColumns:3];

    [tableString appendAttributedString:[self printTitleTableCellAttributedStringWithString:@"1. zadatak\n"
                                                                                      table:table
                                                                              textAlignment:NSLeftTextAlignment
                                                                                        row:0
                                                                                     column:0]];

    [tableString appendAttributedString:[self printTitleTableCellAttributedStringWithString:[self.problemname.stringValue stringByAppendingString:@"\n"]
                                                                                      table:table
                                                                              textAlignment:NSCenterTextAlignment
                                                                                        row:0
                                                                                     column:1]];

    [tableString appendAttributedString:[self printTitleTableCellAttributedStringWithString:@"20 bodova\n"
                                                                                      table:table
                                                                              textAlignment:NSRightTextAlignment
                                                                                        row:0
                                                                                     column:2]];
    [table release];
    return [tableString autorelease];
}



- (NSMutableAttributedString *) printTitleTableCellAttributedStringWithString:(NSString *)string
                                                                        table:(NSTextTable *)table
                                                                textAlignment:(NSTextAlignment)textAlignment
                                                                          row:(int)row
                                                                       column:(int)column
{
    NSColor *backgroundColor = [NSColor colorWithCalibratedRed:0 
                                                         green:0 
                                                          blue:0x80/255. 
                                                         alpha:0xFF];;
    NSColor *borderColor = [NSColor whiteColor];


    NSTextTableBlock *block = [[NSTextTableBlock alloc]
                               initWithTable:table
                               startingRow:row
                               rowSpan:1
                               startingColumn:column
                               columnSpan:1];
    [block setBackgroundColor:backgroundColor];
    [block setBorderColor:borderColor];
    [block setWidth:0.0 type:NSTextBlockAbsoluteValueType forLayer:NSTextBlockBorder];
    [block setWidth:2.0 type:NSTextBlockAbsoluteValueType forLayer:NSTextBlockPadding];

    NSMutableParagraphStyle *paragraphStyle =
    [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    [paragraphStyle setTextBlocks:[NSArray arrayWithObjects:block, nil]];
    [paragraphStyle setAlignment:textAlignment];
    [block release];

    NSMutableAttributedString *cellString =
    [[NSMutableAttributedString alloc] initWithString:string];
    [cellString addAttribute:NSParagraphStyleAttributeName
                       value:paragraphStyle
                       range:NSMakeRange(0, [cellString length])];
    [cellString addAttribute:NSForegroundColorAttributeName
                       value:[NSColor whiteColor]
                       range:NSMakeRange(0, [cellString length])];
    [paragraphStyle release];

    return [cellString autorelease];
}

[printText.textStorage setAttributedString:[self printTitleTableAttributedString]];

据我所知,唯一的办法就是接近完成你想用一个 NSTextView 是制表位。您可以添加 NSTextTab 与…对齐 NSCenterTextAlignment 到行的段落样式。然后使用选项卡将左对齐的文本与中心对齐的文本分开。

最大的问题是,每次文本视图的大小改变时,都必须计算文本视图的中心点并在该位置创建制表位。

我想你也可以把 NSLayoutManager ,但这可能比你想象的要严厉。