コアテキスト異なる高さの複数の列

Question

最初の列の高さが残りの列よりも短く、すべての列が下部にあっても列内にテキストを描画するビューを作成する必要があります。最初の列の高さを変更しようとすると、すべての列が同じサイズに縮小され、上部に揃えられます。 yの値に負の数を追加しようとすると、列が小さくなりますが、rectの一番下にあるテキストの一部が切り捨てられます。どんな助けでも大歓迎です。ここで

は、コードは次のとおりです。

#import "StoryCoreTextView.h" 
#import <CoreText/CoreText.h> 


@implementation StoryCoreTextView 

@synthesize story; 


- (id)initWithFrame:(CGRect)frame { 
    self = [super initWithFrame:frame]; 
    if (self) { 
     // Initialization code. 
    } 
    return self; 
} 


// Only override drawRect: if you perform custom drawing. 
// An empty implementation adversely affects performance during animation. 
- (void)drawRect:(CGRect)rect { 
    // Drawing code. 
    NSString *myLongText = [self getLongText]; /* ... */ 

    NSMutableAttributedString *string = [[NSMutableAttributedString alloc]initWithString:myLongText]; 

    // make a few words bold 
    CTFontRef georgia = CTFontCreateWithName(CFSTR("Georgia"), 14.0, NULL); 
    CTFontRef georgiaBold = CTFontCreateWithName(CFSTR("Georgia-Bold"), 14.0, NULL); 

    [string addAttribute:(id)kCTFontAttributeName 
        value:(id)georgia 
        range:NSMakeRange(0, [string length])]; 

        range:NSMakeRange(223, 6)]; 

    // create paragraph style and assign text alignment to it 
    CTTextAlignment alignment = kCTJustifiedTextAlignment; 
    CTParagraphStyleSetting _settings[] = { {kCTParagraphStyleSpecifierAlignment, sizeof(alignment), &alignment} }; 
    CTParagraphStyleRef paragraphStyle = CTParagraphStyleCreate(_settings, sizeof(_settings)/sizeof(_settings[0])); 

    // set paragraph style attribute 
    CFAttributedStringSetAttribute(string, CFRangeMake(0, CFAttributedStringGetLength(string)), kCTParagraphStyleAttributeName, paragraphStyle); 


    // layout master 
    CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)string); 

    // column 1 form 
    CGMutablePathRef column1Path = CGPathCreateMutable(); 
    CGPathAddRect(column1Path, NULL, 
        CGRectMake(10, -200, self.bounds.size.width/6.0 - 20, self.bounds.size.height - 200)); 

    // column 1 frame 
    CTFrameRef column1Frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), column1Path, NULL); 

    // column 2 form 
    CGMutablePathRef column2Path = CGPathCreateMutable(); 
    CGPathAddRect(column2Path, NULL, 
        CGRectMake(self.bounds.size.width/6.0 + 10, 10, 
          self.bounds.size.width/6.0 - 20, 
          self.bounds.size.height - 20)); 

    NSInteger colum2Start = CTFrameGetVisibleStringRange(column1Frame).length; 

    // column 2 frame 
    CTFrameRef column2Frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(colum2Start - 250, 0), column2Path, NULL); 

    // column 3 form 
    CGMutablePathRef column3Path = CGPathCreateMutable(); 
    CGPathAddRect(column3Path, NULL, 
        CGRectMake(2 * self.bounds.size.width/6.0+10, 10, 
          self.bounds.size.width/6.0 -20, 
          self.bounds.size.height-20)); 

    NSInteger colum3Start = CTFrameGetVisibleStringRange(column2Frame).length; 

    // column 3 frame 
    CTFrameRef column3Frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(colum3Start, 0), column3Path, NULL); 

    // column 4 form 
    CGMutablePathRef column4Path = CGPathCreateMutable(); 
    CGPathAddRect(column4Path, NULL, 
        CGRectMake(3 *self.bounds.size.width/6.0+10, 10, 
          self.bounds.size.width/6.0-20, 
          self.bounds.size.height-20)); 

    NSInteger colum4Start = CTFrameGetVisibleStringRange(column3Frame).length; 

    // column 4 frame 
    CTFrameRef column4Frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(colum4Start, 0), column4Path, NULL); 

    // flip the coordinate system 
    CGContextRef context = UIGraphicsGetCurrentContext(); 
    CGContextSetTextMatrix(context, CGAffineTransformIdentity); 
    CGContextTranslateCTM(context, 0, self.bounds.size.height); 
    CGContextScaleCTM(context, 1.0, -1.0); 

    // draw 
    CTFrameDraw(column1Frame, context); 
    CTFrameDraw(column2Frame, context); 
    CTFrameDraw(column3Frame, context); 
    CTFrameDraw(column4Frame, context); 
    CTFrameDraw(column5Frame, context); 
    CTFrameDraw(column6Frame, context); 

    // cleanup 
    CFRelease(column1Frame); 
    CGPathRelease(column1Path); 
    CFRelease(column2Frame); 
    CGPathRelease(column2Path); 
    CFRelease(column3Frame); 
    CGPathRelease(column3Path); 
    CFRelease(column4Frame); 
    CGPathRelease(column4Path); 
    CFRelease(framesetter); 
    CFRelease(georgia); 
    CFRelease(georgiaBold); 
    [string release]; 
} 


- (void)dealloc { 
    [super dealloc]; 
} 

- (NSString *)getLongText { 

    NSString *longText = @"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum facilisis imperdiet sem, eu fermentum metus rhoncus ac. Nunc luctus ligula at erat varius at laoreet dolor iaculis. Nulla facilisi. Vivamus vestibulum massa tristique magna convallis ut suscipit dolor aliquet. Aliquam mollis porttitor tortor a venenatis. In tincidunt ornare posuere. In varius augue ut orci interdum in hendrerit tortor volutpat. Integer nec libero vel eros dignissim porta in nec nibh. Aenean sollicitudin justo vel augue pulvinar tincidunt. Phasellus dictum convallis dui in semper. Nam eros leo, dapibus eu porta non, aliquet id velit. Integer felis nisl, fermentum facilisis rutrum eget, consequat non nisl."; 
    return longText; 
} 


@end 

Answer 1

私はむしろ、複数の長方形からのパスを作るためにあなたをお勧めしたい：

// column 1 and 2 form 
    CGMutablePathRef columnPath = CGPathCreateMutable(); 
    CGPathAddRect(column1Path, NULL, 
        CGRectMake(10, -200, self.bounds.size.width/6.0 - 20, self.bounds.size.height - 200)); 
    CGPathAddRect(column2Path, NULL, 
        CGRectMake(self.bounds.size.width/6.0 + 10, 10, 
          self.bounds.size.width/6.0 - 20, 
          self.bounds.size.height - 20)); 
... 
    // use this CGPathRef for CTFramesetterRef 
...