CTStringAttributes.h学习

完成丰富的布局离不开文本String 下面学习 学习CTStringAttributes

配置富文本的key

key value 注意事项
kCTFontAttributeName CTFontRef 配置富文本的字体默认是 Helvetica 12
kCTForegroundColorFromContextAttributeName CFBooleanRef Default is false ，设置为true kCTForegroundColorAttributeName 颜色不起作用 用的context的 setFillColor 而kCTUnderlineStyleAttributeName 颜色用的是context 的strokeColor
kCTKernAttributeName CFNumberRef 字符之间的间隔 默认是 0.0
kCTLigatureAttributeName CFNumberRef 默认值是1 ，用法不清楚
kCTForegroundColorAttributeName CGColorRef 默认是black 。设置字体颜色
kCTBackgroundColorAttributeName CGColorRef 默认透明，背景颜色
kCTParagraphStyleAttributeName CTParagraphStyleRef 默认不设置该属性。可以设置例如line 对对齐，写的方向，tab规则等。
kCTStrokeWidthAttributeName CFNumberRef 线宽。默认0.0
kCTStrokeColorAttributeName CGColorRef 线的颜色。默认是 foreground颜色。没啥变化，有时间再研究
kCTUnderlineStyleAttributeName CFNumberRef 下划线 类型有 CTUnderlineStyle
kCTSuperscriptAttributeName CFNumberRef 默认是0.上标还是下标。 要 the specified font。具体是啥字体不知道。 -1 下标 1 上标。暂时设置没效果。
kCTUnderlineColorAttributeName CGColorRef 默认是foreground 颜色 ，下划线颜色.
kCTVerticalFormsAttributeName CFBooleanRef value false horizontal value true vertical
kCTHorizontalInVerticalFormsAttributeName CFNumberRef 默认是0. value 是1 to 4 只有设置 kCTVerticalFormsAttributeName才起作用.目前不知道杂用。没效果
kCTGlyphInfoAttributeName CTGlyphInfoRef 改value 不知道杂用，暂时过
kCTCharacterShapeAttributeName CFNumberRef 9.0 以后才能用 ，暂时value 值不知道咋用
kCTLanguageAttributeName CFStringRef 具体value值有哪些。暂时不管。
kCTRunDelegateAttributeName CTRunDelegateRef 可以用来图文混拍的东西。替代的每一个cgglyph
kCTBaselineClassAttributeName CFStringRef value 有 kCTBaselineClassRoman， kCTBaselineClassIdeographicCentered， kCTBaselineClassIdeographicLow， kCTBaselineClassIdeographicHigh， kCTBaselineClassHanging， kCTBaselineClassMath，暂时不知道杂用
kCTBaselineInfoAttributeName CFDictionaryRef key 是 value 有 kCTBaselineClassRoman， kCTBaselineClassIdeographicCentered， kCTBaselineClassIdeographicLow， kCTBaselineClassIdeographicHigh， kCTBaselineClassHanging， kCTBaselineClassMath，暂时不知道杂用，不会用
kCTBaselineReferenceInfoAttributeName CFDictionaryRef key 是 value 有 kCTBaselineClassRoman， kCTBaselineClassIdeographicCentered， kCTBaselineClassIdeographicLow， kCTBaselineClassIdeographicHigh， kCTBaselineClassHanging， kCTBaselineClassMath，暂时不知道杂用，不会用
kCTWritingDirectionAttributeName CFArray 数组中是 number 。暂时不会用
kCTRubyAnnotationAttributeName CTRubyAnnotation 暂时不会用 
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-(void)setstring:(NSMutableAttributedString * )beginStr appendString:(CFStringRef )key value:(id)value string:(NSString *)string{
  NSRange range =   [beginStr.string rangeOfString:string];
    NSMutableDictionary * dic = [NSMutableDictionary dictionaryWithObject:value forKey:(__bridge NSString *)key];
    [beginStr setAttributes:dic range:range];
}
-(void)string:(NSMutableAttributedString * )beginStr appendString:(CFStringRef )key value:(id)value string:(NSString *)string{
    
    
    NSMutableAttributedString *nextMabstring = [[NSMutableAttributedString alloc]initWithString:string];
    
    NSMutableDictionary * dic = [NSMutableDictionary dictionaryWithObject:value forKey:(__bridge NSString *)key];
    [nextMabstring setAttributes:dic range:NSMakeRange(0, nextMabstring.length)];
    [beginStr appendAttributedString:nextMabstring];
    
}
-(void)drawRect:(CGRect)rect{
    NSMutableAttributedString *mabstring = [[NSMutableAttributedString alloc]initWithString:@""];
    
    [self string:mabstring appendString:kCTFontAttributeName value:[UIFont systemFontOfSize:24] string:@"kCTFontAttributeName"];
    [self string:mabstring appendString:kCTForegroundColorFromContextAttributeName value:@(YES) string:@"kCTForegroundColorFromContextAttributeName"];
    [self string:mabstring appendString:kCTKernAttributeName value:@(30) string:@"kCTKernAttributeName"];
    [self string:mabstring appendString:kCTLigatureAttributeName value:@(2) string:@"kCTLigatureAttributeName"];
    [self string:mabstring appendString:kCTForegroundColorAttributeName value:(id)([UIColor redColor].CGColor) string:@"kCTForegroundColorAttributeName"];
    [self string:mabstring appendString:kCTBackgroundColorAttributeName value:(id)([UIColor blueColor].CGColor) string:@"kCTBackgroundColorAttributeName"];
    CTParagraphStyleSetting setting[1] ;
    CGFloat vale =30;
    setting[0].spec = kCTParagraphStyleSpecifierLineSpacingAdjustment;
    setting[0].valueSize =sizeof(CGFloat);
    setting[0].value = &vale;
    CTParagraphStyleRef stlye = CTParagraphStyleCreate(setting, 1);
    [self string:mabstring appendString:kCTParagraphStyleAttributeName value:(id)(stlye) string:@"kCTParagraphStyleAttributeName"];
    [self string:mabstring appendString:kCTStrokeWidthAttributeName value:(id)(@(5)) string:@"kCTStrokeWidthAttributeName"];
    
    [self string:mabstring appendString:kCTStrokeColorAttributeName value:(id)([UIColor redColor].CGColor) string:@"kCTStrokeColorAttributeName"];
    
    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleDouble)) string:@"kCTUnderlineStyleAttributeName"];
    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleThick)) string:@"kCTUnderlineStyleAttributeName"];
    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleSingle)) string:@"kCTUnderlineStyleAttributeName"];
    [self string:mabstring appendString:kCTSuperscriptAttributeName value:(id)(@(-1)) string:@"kCTSuperscriptAttributeName"];
    
    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleSingle)) string:@"kCTUnderlineColorAttributeName"];
    [self setstring:mabstring appendString:kCTUnderlineColorAttributeName value:(id)([UIColor redColor].CGColor) string:@"kCTUnderlineColorAttributeName"];
    [self string:mabstring appendString:kCTVerticalFormsAttributeName value:(id)(@(YES)) string:@"kCTVerticalFormsAttributeName"];
    
        [self string:mabstring appendString:kCTVerticalFormsAttributeName value:(id)(@(YES)) string:@"kCTHorizontalInVerticalFormsAttributeName"];
//        [self setstring:mabstring appendString:kCTHorizontalInVerticalFormsAttributeName value:(id)(@(3)) string:@"kCTHorizontalInVerticalFormsAttributeName"];
   
    
//    [self string:mabstring appendString:kCTGlyphInfoAttributeName value:(id)([UIColor blueColor].CGColor) string:@"kCTGlyphInfoAttributeName"];
    
//    [self string:mabstring appendString:kCTCharacterShapeAttributeName value:(id)(@(3)) string:@"kCTCharacterShapeAttributeName"];
    
    
    
    [self string:mabstring appendString:kCTLanguageAttributeName value:(id)(@"Helvetica") string:@"kCTLanguageAttributeName"];
    
    
    
    CTRunDelegateDeallocateCallback  deallocateCallback= CTRunDelegateDeallocateCallbackFunction;
    
    NSLog(@"CTRunDelegateGetAscentCallback 获取ascent");
    CTRunDelegateGetAscentCallback ascentCallback= CTRunDelegateGetAscentCallbackFunction;
    CTRunDelegateGetDescentCallback descentCallback =  CTRunDelegateGetDescentCallbackFunction;
    
    CTRunDelegateGetWidthCallback widthCallBack = CTRunDelegateGetWidthCallbackFunction;
    
    CTRunDelegateCallbacks callBack ;
    callBack.version =kCTRunDelegateCurrentVersion;
    callBack.dealloc = deallocateCallback;
    callBack.getAscent = ascentCallback;
    callBack.getDescent = descentCallback;
    callBack.getWidth = widthCallBack;
    
    CTRunDelegateRef delegate=  CTRunDelegateCreate(&callBack, NULL);
    ///获取delegate值
    [self string:mabstring appendString:kCTRunDelegateAttributeName value:(__bridge id)(delegate) string:@"kCTRunDelegateAttributeName"];
    
    [self string:mabstring appendString:kCTBaselineClassAttributeName value:(id)(kCTBaselineClassRoman) string:@"kCTBaselineClassAttributeName"];
    [self string:mabstring appendString:kCTBaselineClassAttributeName value:(id)(kCTBaselineClassIdeographicCentered) string:@"kCTBaselineClassAttributeName"];
    [self string:mabstring appendString:kCTBaselineClassAttributeName value:(id)(kCTBaselineClassIdeographicLow) string:@"kCTBaselineClassAttributeName"];
    [self string:mabstring appendString:kCTBaselineClassAttributeName value:(id)(kCTBaselineClassIdeographicHigh) string:@"kCTBaselineClassAttributeName"];
    [self string:mabstring appendString:kCTBaselineClassAttributeName value:(id)(kCTBaselineClassHanging) string:@"kCTBaselineClassAttributeName"];
    [self string:mabstring appendString:kCTBaselineClassAttributeName value:(id)(kCTBaselineClassMath) string:@"kCTBaselineClassAttributeName"];
    
    
    
//    [self string:mabstring appendString:kCTBaselineInfoAttributeName value:(id)([UIColor blueColor].CGColor) string:@"kCTBaselineInfoAttributeName"];
    
    
    
//    [self string:mabstring appendString:kCTBaselineReferenceInfoAttributeName value:(id)([UIColor blueColor].CGColor) string:@"kCTBaselineReferenceInfoAttributeName"];
    
//    [self string:mabstring appendString:kCTWritingDirectionAttributeName value:(id)([UIColor blueColor].CGColor) string:@"kCTWritingDirectionAttributeName"];
//    [self string:mabstring appendString:kCTRubyAnnotationAttributeName value:(id)([UIColor blueColor].CGColor) string:@"kCTRubyAnnotationAttributeName"];
    
    
    
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetTextMatrix(context , CGAffineTransformIdentity);
    CGContextTranslateCTM(context , 0 ,self.bounds.size.height);
    CGContextScaleCTM(context, 1.0 ,-1.0);
    
    CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)mabstring);
    
    
    CGMutablePathRef Path = CGPathCreateMutable();
    CGPathAddRect(Path, NULL ,CGRectMake(10 , 0 ,self.bounds.size.width-10 , self.bounds.size.height-60));
    CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
    CTFrameDraw(frame, context);
}
void CTRunDelegateDeallocateCallbackFunction (void * refCon ){
    
}
CGFloat CTRunDelegateGetAscentCallbackFunction (void * refCon ){
    return 30;
}
CGFloat CTRunDelegateGetDescentCallbackFunction (void * refCon ){
    return 30;
}
CGFloat CTRunDelegateGetWidthCallbackFunction(void * refCon ){
    return 30;
}

结果截图

image

这个类就是 attString 配置类。

下面就是上面难点和不太清楚的地方攻关

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kCTForegroundColorFromContextAttributeName  这个开关是关于是否用context 颜色来填充
要是yes的话，kCTUnderlineStyleAttributeName 属性将失去效果。
-(void)drawRect:(CGRect)rect{
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetRGBStrokeColor(context, 0, 1, 0, 1);
    NSMutableAttributedString *mabstring = [[NSMutableAttributedString alloc]initWithString:@"kCTForegroundColorFromContextAttributeName"];
    
    NSMutableDictionary * dic = [NSMutableDictionary dictionaryWithObject:(id)(@(YES)) forKey:(__bridge NSString *)kCTForegroundColorFromContextAttributeName];
    [dic setObject:(id)([UIColor redColor].CGColor) forKey:(__bridge NSString *)kCTUnderlineColorAttributeName];
    [dic setObject:(id)(@(kCTUnderlineStyleSingle)) forKey:(__bridge NSString *)kCTUnderlineStyleAttributeName];
    
    [mabstring setAttributes:dic range:NSMakeRange(0, mabstring.length)];
    
    CGContextSetTextMatrix(context , CGAffineTransformIdentity);
    CGContextTranslateCTM(context , 0 ,self.bounds.size.height);
    CGContextScaleCTM(context, 1.0 ,-1.0);
    
    
    CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)mabstring);
    
    
    CGMutablePathRef Path = CGPathCreateMutable();
    CGPathAddRect(Path, NULL ,CGRectMake(10 , 0 ,self.bounds.size.width-10 , self.bounds.size.height-60));
    CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
    CTFrameDraw(frame, context);
    
}

效果 image

同时设置CGContextRef 颜色 和 kCTUnderlineStyleAttributeName 属性值，而其动作用的是CGContextRef颜色。

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kCTLigatureAttributeName  连体字  没发现可用的字体
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kCTSuperscriptAttributeName  上标和下标 没看出效果
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kCTUnderlineColorAttributeName  这个可以被 kCTForegroundColorFromContextAttributeName 属性影响， 要是该属性设置为yes  那么该属性就失效了
补充： 下划线的还可以设置成一下样式：
-(void)drawRect:(CGRect)rect{
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetRGBStrokeColor(context, 0, 1, 0, 1);
    NSMutableAttributedString *mabstring = [[NSMutableAttributedString alloc]initWithString:@""];
    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleDouble|kCTUnderlinePatternSolid)) string:@"\nkCTUnderlineStyleAttributeName"];    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleDouble|kCTUnderlinePatternDot)) string:@"\nkCTUnderlineStyleAttributeName"];    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleDouble|kCTUnderlinePatternDash)) string:@"\nkCTUnderlineStyleAttributeName"];    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleDouble|kCTUnderlinePatternDashDot)) string:@"\nkCTUnderlineStyleAttributeName"];    [self string:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleDouble|kCTUnderlinePatternDashDotDot)) string:@"\nkCTUnderlineStyleAttributeName"];
    CGContextSetTextMatrix(context , CGAffineTransformIdentity);
    CGContextTranslateCTM(context , 0 ,self.bounds.size.height);
    CGContextScaleCTM(context, 1.0 ,-1.0);
    
    
    CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)mabstring);
    
    
    CGMutablePathRef Path = CGPathCreateMutable();
    CGPathAddRect(Path, NULL ,CGRectMake(10 , 0 ,self.bounds.size.width-10 , self.bounds.size.height-60));
    CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
    CTFrameDraw(frame, context);
    
}

效果图：image

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kCTHorizontalInVerticalFormsAttributeName   暂时不知道有啥用
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kCTGlyphInfoAttributeName  这个具体用法要看CTGlyphInfo.h
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kCTCharacterShapeAttributeName  9.0 以后被废弃了。不研究
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kCTLanguageAttributeName   暂时不知道干嘛用
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kCTBaselineClassAttributeName  没研究
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kCTBaselineInfoAttributeName 没研究
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kCTBaselineReferenceInfoAttributeName  没研究
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kCTWritingDirectionAttributeName  没研究
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kCTRubyAnnotationAttributeName   类似汉语拼音的注音
-(void)drawRect:(CGRect)rect{
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetRGBStrokeColor(context, 0, 1, 0, 1);
    NSMutableAttributedString *mabstring = [[NSMutableAttributedString alloc]initWithString:@"kCTRubyAnnotationAttributeName"];
    CTRubyAnnotationRef rubyAnnotation =CTRubyAnnotationCreateWithAttributes(0, 0, 0, (__bridge CFStringRef)@"nihoa", NULL);
    NSMutableDictionary * dic = [NSMutableDictionary dictionaryWithObject:(__bridge id)(rubyAnnotation) forKey:(__bridge NSString *)kCTRubyAnnotationAttributeName];
    [mabstring setAttributes:dic range:NSMakeRange(0, mabstring.length)];
    CGContextSetTextMatrix(context , CGAffineTransformIdentity);
    CGContextTranslateCTM(context , 0 ,self.bounds.size.height);
    CGContextScaleCTM(context, 1.0 ,-1.0);
    
    
    CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)mabstring);
    
    
    CGMutablePathRef Path = CGPathCreateMutable();
    CGPathAddRect(Path, NULL ,CGRectMake(10 , 0 ,self.bounds.size.width-10 , self.bounds.size.height-60));
    CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
    CTFrameDraw(frame, context);
    
}

效果如下:

image

难点攻关

kCTForegroundColorFromContextAttributeName 这个设置为yes 这个下划线的颜色就和context setStroke 颜色一样了。
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-(void)drawRect:(CGRect)rect{
 CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetTextMatrix(context , CGAffineTransformIdentity);
    CGContextTranslateCTM(context , 0 ,self.bounds.size.height);
    CGContextScaleCTM(context, 1.0 ,-1.0);
    CGContextSetRGBStrokeColor(context, 0, 1, 0, 1);//绿色
    CGContextSetRGBFillColor(context, 0,0, 1, 1);//蓝色
    NSMutableAttributedString *mabstring = [[NSMutableAttributedString alloc]initWithString:@""];
    [self string:mabstring appendString:kCTForegroundColorFromContextAttributeName value:@(true) string:@"kCTForegroundColorFromContextAttributeName"];
    [self setstring:mabstring appendString:kCTUnderlineColorAttributeName value:(id)([UIColor redColor].CGColor) string:@"kCTForegroundColorFromContextAttributeName"];
    [self setstring:mabstring appendString:kCTUnderlineStyleAttributeName value:(id)(@(kCTUnderlineStyleDouble|kCTUnderlinePatternDot))  string:@"kCTForegroundColorFromContextAttributeName"];
    
     CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)mabstring);
     
     
     CGMutablePathRef Path = CGPathCreateMutable();
     CGPathAddRect(Path, NULL ,CGRectMake(10 , 0 ,self.bounds.size.width-10 , self.bounds.size.height-60));
     CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
     CTFrameDraw(frame, context);
}
-(void)setstring:(NSMutableAttributedString * )beginStr appendString:(CFStringRef )key value:(id)value string:(NSString *)string{
  NSRange range =   [beginStr.string rangeOfString:string];
    [beginStr addAttribute:(__bridge NSString *)key value:value range:range];
}
-(void)string:(NSMutableAttributedString * )beginStr appendString:(CFStringRef )key value:(id)value string:(NSString *)string{
    
    
    NSMutableAttributedString *nextMabstring = [[NSMutableAttributedString alloc]initWithString:string];
    
    NSMutableDictionary * dic = [NSMutableDictionary dictionaryWithObject:value forKey:(__bridge NSString *)key];
    [nextMabstring setAttributes:dic range:NSMakeRange(0, nextMabstring.length)];
    [beginStr appendAttributedString:nextMabstring];
    
}
纠正-(void)setstring:(NSMutableAttributedString )beginStr appendString:(CFStringRef )key value:(id)value string:(NSString )string 这个方法的实现 ，以前的方法把原有属性都给替换掉了。这个是增加属性。而不是替换 结果

image

从图中可以看出 如果 kCTForegroundColorFromContextAttributeName 设置为true 那么 下划线颜色 和 context 设置的strokeColor 颜色一样 而文本颜色和 context的fillColor一样

要是该属性设置为 false 那么结果如图

image

kCTVerticalFormsAttributeName

设置为true 字体单个垂直书写

未解决问题汇总

kCTLigatureAttributeName

kCTSuperscriptAttributeName 这个是special font 才有的，目前不知道special font 有哪些。

kCTHorizontalInVerticalFormsAttributeName 设置不起作用

kCTCharacterShapeAttributeName 这个没弄

kCTLanguageAttributeName

kCTBaselineReferenceInfoAttributeName

kCTBaselineInfoAttributeName

kCTBaselineClassAttributeName

以上三个 kCTBaselineReferenceInfoAttributeName 和 kCTBaselineClassAttributeName 属性同时使用有效果， kCTBaselineReferenceInfoAttributeName 对应的key是包含 kCTBaselineClass 的值， value是 number

kCTWritingDirectionAttributeName 书写方向问题。不是很了解。暂时不关注

kCTRubyAnnotationAttributeName 这个类似给文字注入拼音。

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    缺失模块。
    1、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    2、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: true
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

很惭愧<br><br>只做了一点微小的工作<br>谢谢大家