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最初の列の高さが残りの列よりも短く、すべての列が一番下にある列にテキストをレンダリング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、上部に配置されます。y 値に負の数を追加しようとすると、列が下がりますが、四角形の下部にあるテキストの一部が切り取られます。どんな助けでも大歓迎です。

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
4

1 に答える 1

1

複数の長方形からパスを作成することをお勧めします。

  // 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
...
于 2011-03-03T14:44:24.077 に答える