Мне нужно создать представление, которое отображает текст в столбцах с высотой первого столбца, которая короче остальных столбцов, и все столбцы находятся даже внизу. Когда я пытаюсь изменить высоту первого столбца, все столбцы уменьшаются до одинакового размера и выравниваются сверху. Если я пытаюсь добавить отрицательные числа для значения y, это понижает столбец, но обрезает часть текста в нижней части прямоугольника. Любая помощь будет принята с благодарностью.
Вот код:
#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