코어 텍스트에 속성 범위를 추가하는 방법은 무엇입니까?

Question

CoreText에서 가능한 한 UILabel 동작에 대해 작동하는 메서드를 만드는 데 관심이 있습니다. 따라서 다음과 비슷한 것을 얻으려고한다면 :

UIFont *font1 = [UIFont fontWithName:kMyriadProSemiBold size:15]; 
NSDictionary *arialDict = [NSDictionary dictionaryWithObject: font1 forKey:NSFontAttributeName]; 
NSMutableAttributedString *aAttrString1 = [[NSMutableAttributedString alloc] initWithString:@"My" attributes: arialDict]; 

UIFont *font2 = [UIFont fontWithName:kMyriadProRegular size:15]; 
NSDictionary *arialDict2 = [NSDictionary dictionaryWithObject: font2 forKey:NSFontAttributeName]; 
NSMutableAttributedString *aAttrString2 = [[NSMutableAttributedString alloc] initWithString:@"Profile" attributes: arialDict2]; 

[aAttrString1 appendAttributedString:aAttrString2]; 

그러나 핵심 텍스트를 사용합니다.

현재 나는 다음 방법을 사용하고 있습니다 :

+ (void)drawText:(NSString *)textToDraw 
     inFrame:(CGRect)frameRect 
     withFont:(UIFont *)originalFont 
     textColor:(UIColor *)textColor 
     alignment:(PDFTextAlignment)alignment{ 

    if (!textToDraw) { 
     // If nil, give it an empty value to draw 
     textToDraw = @""; 
    } 


    // Prepare font 
    CTFontRef font = [PDFManager ctFontRefFromUIFont:originalFont]; 
    CGColorRef color = textColor.CGColor; 

    // Paragraph 
    CTTextAlignment ctAlignment; 
    switch (alignment) { 
     case PDFTextAlignmentLeft: 
      ctAlignment = kCTTextAlignmentLeft; 
      break; 
     case PDFTextAlignmentCenter: 
      ctAlignment = kCTTextAlignmentCenter; 
      break; 
     case PDFTextAlignmentRight: 
      ctAlignment = kCTTextAlignmentRight; 
      break; 
     case PDFTextAlignmentJustified: 
      ctAlignment = kCTTextAlignmentJustified; 
      break; 
     default: 
      ctAlignment = kCTTextAlignmentLeft; 
      break; 
    } 

    CTParagraphStyleSetting settings[] = { 
     {kCTParagraphStyleSpecifierAlignment, sizeof(ctAlignment), &ctAlignment}, 
    }; 

    CTParagraphStyleRef paragraphStyle = CTParagraphStyleCreate(settings, sizeof(settings)/sizeof(settings[0])); 

    // Create an attributed string 
    CFStringRef keys[] = { kCTFontAttributeName, kCTForegroundColorAttributeName, kCTParagraphStyleAttributeName }; 
    CFTypeRef values[] = { font, color, paragraphStyle }; 
    CFDictionaryRef attr = CFDictionaryCreate(NULL, (const void **)&keys, (const void **)&values, 
               sizeof(keys)/sizeof(keys[0]), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); 

    CFStringRef stringRef = (__bridge CFStringRef)textToDraw; 
    // Prepare the text using a Core Text Framesetter. 
    CFAttributedStringRef currentText = CFAttributedStringCreate(NULL, stringRef, attr); 

    CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(currentText); 


    CGMutablePathRef framePath = CGPathCreateMutable(); 

    CGPathAddRect(framePath, NULL, frameRect); 

    // Get the frame that will do the rendering. 
    CFRange currentRange = CFRangeMake(0, 0); 
    CTFrameRef frameRef = CTFramesetterCreateFrame(framesetter, currentRange, framePath, NULL); 
    CGPathRelease(framePath); 

    // Get the graphics context. 
    CGContextRef currentContext = UIGraphicsGetCurrentContext(); 

    // Put the text matrix into a known state. This ensures 
    // that no old scaling factors are left in place. 
    CGContextSetTextMatrix(currentContext, CGAffineTransformIdentity); 

    // Core Text draws from the bottom-left corner up, so flip 
    // the current transform prior to drawing. 
    // Modify this to take into consideration the origin. 
    CGContextTranslateCTM(currentContext, 0, frameRect.origin.y*2); 
    CGContextScaleCTM(currentContext, 1.0, -1.0); 

    // Draw the frame. 
    CTFrameDraw(frameRef, currentContext); 

    // Add these two lines to reverse the earlier transformation. 
    CGContextScaleCTM(currentContext, 1.0, -1.0); 
    CGContextTranslateCTM(currentContext, 0, (-1)*frameRect.origin.y*2); 

    //Confirm that everything is released that needs to be! 
    CFRelease(frameRef); 
    CFRelease(stringRef); 
    CFRelease(framesetter); 
    CFRelease(font); 
    CFRelease(paragraphStyle); 
} 

을 그리고 나는 또한 새로운 속성을 수용하기 위해서 CFDictionaryRef attr를 업데이트해야? 실제로 휴한지로 NSAttributedString은을 사용하여 위에서로 방법을 전환하여 결국

Answer 1

:

+ (void)drawAttributedText:(NSAttributedString *)textToDraw 
        inFrame:(CGRect)frameRect 
       alignment:(PDFTextAlignment)alignment{ 

    // Paragraph 
    CTTextAlignment ctAlignment; 
    switch (alignment) { 
     case PDFTextAlignmentLeft: 
      ctAlignment = kCTTextAlignmentLeft; 
      break; 
     case PDFTextAlignmentCenter: 
      ctAlignment = kCTTextAlignmentCenter; 
      break; 
     case PDFTextAlignmentRight: 
      ctAlignment = kCTTextAlignmentRight; 
      break; 
     case PDFTextAlignmentJustified: 
      ctAlignment = kCTTextAlignmentJustified; 
      break; 
     default: 
      ctAlignment = kCTTextAlignmentLeft; 
      break; 
    } 

    CTParagraphStyleSetting settings[] = { 
     {kCTParagraphStyleSpecifierAlignment, sizeof(ctAlignment), &ctAlignment}, 
    }; 

    CTParagraphStyleRef paragraphStyle = CTParagraphStyleCreate(settings, sizeof(settings)/sizeof(settings[0])); 

    CFAttributedStringRef currentText = (__bridge CFAttributedStringRef)textToDraw; 

    CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(currentText); 

    CGMutablePathRef framePath = CGPathCreateMutable(); 

    CGPathAddRect(framePath, NULL, frameRect); 

    // Get the frame that will do the rendering. 
    CFRange currentRange = CFRangeMake(0, 0); 
    CTFrameRef frameRef = CTFramesetterCreateFrame(framesetter, currentRange, framePath, NULL); 
    CGPathRelease(framePath); 

    // Get the graphics context. 
    CGContextRef currentContext = UIGraphicsGetCurrentContext(); 

    // Put the text matrix into a known state. This ensures 
    // that no old scaling factors are left in place. 
    CGContextSetTextMatrix(currentContext, CGAffineTransformIdentity); 

    // Core Text draws from the bottom-left corner up, so flip 
    // the current transform prior to drawing. 
    // Modify this to take into consideration the origin. 
    CGContextTranslateCTM(currentContext, 0, frameRect.origin.y*2); 
    CGContextScaleCTM(currentContext, 1.0, -1.0); 

    // Draw the frame. 
    CTFrameDraw(frameRef, currentContext); 

    // Add these two lines to reverse the earlier transformation. 
    CGContextScaleCTM(currentContext, 1.0, -1.0); 
    CGContextTranslateCTM(currentContext, 0, (-1)*frameRect.origin.y*2); 

    //Confirm that everything is released that needs to be! 
    CFRelease(frameRef); 
    CFRelease(framesetter); 
    CFRelease(paragraphStyle); 

} 

+ (NSMutableAttributedString *)getAttributedString:(NSString *)str 
              withFont:(UIFont *)font 
              andColor:(UIColor *)fontColor{ 
    NSDictionary *arialDict = [NSDictionary dictionaryWithObject: font forKey:NSFontAttributeName]; 
    NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:str attributes: arialDict]; 
    return attrString; 
} 

그것을 사용하는 방법은 다음과 같습니다

+ (void)drawPDFTitleUsingString:(NSString *)passedTitle{ 



    NSMutableAttributedString *attStr1 = [self getAttributedString:NSLocalizedString(@"Normal part of the string, ", nil) 
                 withFont:FONT_CLEAR_SANS_REGULAR(18) 
                 andColor:[UIColor blackColor]]; 

    NSMutableAttributedString *attStr2 = [self getAttributedString:NSLocalizedString(@"bold part of the string", nil) 
                 withFont:FONT_CLEAR_SANS_BOLD(18) 
                 andColor:[UIColor blackColor]]; 

    [attStr1 appendAttributedString:attStr2]; 

    [self drawAttributedText:attStr1 
        inFrame:CGRectMake(PDFTableXPosition, 15 + 55, PDFTableWidth, 42) 
        alignment:PDFTextAlignmentLeft]; 

}