Attributes和ParagraphStyle介绍

NSMutableParagraphStyle的部分属性:

typedef NS_ENUM(NSInteger, NSLineBreakMode) {/* What to do with long lines */  
    NSLineBreakByWordWrapping = 0,     /* Wrap at word boundaries, default */  
    NSLineBreakByCharWrapping,/* Wrap at character boundaries */  
    NSLineBreakByClipping,/* Simply clip */剪掉后面显示不了的部分  
    NSLineBreakByTruncatingHead,/* Truncate at head of line: "...wxyz" */头部分的内容以……方式省略  
    NSLineBreakByTruncatingTail,/* Truncate at tail of line: "abcd..." */结尾部分的内容以……方式省略  
    NSLineBreakByTruncatingMiddle/* Truncate middle of line:  "ab...yz" */中间部分的内容以……方式省略  
} NS_ENUM_AVAILABLE_IOS(6_0);  
  

typedef NS_ENUM(NSInteger, NSWritingDirection) {  
    NSWritingDirectionNatural       = -1,    // Determines direction using the Unicode Bidi Algorithm rules P2 and P3  
    NSWritingDirectionLeftToRight   =  0,    // Left to right writing direction 左到右的书写方向  
    NSWritingDirectionRightToLeft   =  1    // Right to left writing direction 右到左的书写方向  
} NS_ENUM_AVAILABLE_IOS(6_0);  
  

 //   NSParagraphStyleAttributeName 段落的风格(设置首行,行间距,对齐方式什么的)看自己需要什么属性,写什么  
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];  
    paragraphStyle.lineSpacing = 10;// 字体的行间距  
    paragraphStyle.firstLineHeadIndent = 20.0f;//首行缩进  
    paragraphStyle.alignment = NSTextAlignmentJustified;//(两端对齐的)文本对齐方式:(左,中,右,两端对齐,自然)  
    paragraphStyle.lineBreakMode = NSLineBreakByTruncatingTail;//结尾部分的内容以……方式省略 ( "...wxyz" ,"abcd..." ,"ab...yz")  
    paragraphStyle.headIndent = 20;//整体缩进(首行除外)  
    paragraphStyle.tailIndent = 20;//  
    paragraphStyle.minimumLineHeight = 10;//最低行高  
    paragraphStyle.maximumLineHeight = 20;//最大行高  
    paragraphStyle.paragraphSpacing = 15;//段与段之间的间距  
    paragraphStyle.paragraphSpacingBefore = 22.0f;//段首行空白空间/* Distance between the bottom of the previous paragraph (or the end of its paragraphSpacing, if any) and the top of this paragraph. */  
    paragraphStyle.baseWritingDirection = NSWritingDirectionLeftToRight;//从左到右的书写方向(一共??三种)  
    paragraphStyle.lineHeightMultiple = 15;/* Natural line height is multiplied by this factor (if positive) before being constrained by minimum and maximum line height. */  
    paragraphStyle.hyphenationFactor = 1;//连字属性 在iOS,唯一支持的值分别为0和1  
  
/* 
     NSFontAttributeName 字体大小 
     NSParagraphStyleAttributeName 段落的风格(设置首行,行间距,对齐方式什么的) 
     NSKernAttributeName 字间距 
     */  
    NSDictionary *attributes = @{  
                                 NSFontAttributeName:[UIFont systemFontOfSize:15],  
                                 NSParagraphStyleAttributeName:paragraphStyle,  
                                 NSKernAttributeName:@(10),  
                                                                
                                 };  
    textView.attributedText = [[NSAttributedString alloc] initWithString:textView.text attributes:attributes];

NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc] init];
paragraph.alignment = NSTextAlignmentJustified;//设置对齐方式
paragraph.lineBreakMode = NSLineBreakByWordWrapping;

NSAttributedString的初始化方法有
-initWithString:用String初始化,并没有Attributed信息。
-initWithAttributedString:用AttributedString去初始化。
-initWithString:Attributed:用string及attribute的dictionary来初始化。

下面这段代码可以查看ios中可用的字体,具体那些字体长什么样,可以查看字体册工具。

NSArray *familyArray = [UIFont familyNames];
for (id family in familyArray) {
printf(“%s\n”,[family cStringUsingEncoding:NSUTF8StringEncoding]);
NSArray *fontArray = [UIFont fontNamesForFamilyName:family];
for (id font in fontArray) {
printf(”   %s\n”,[font cStringUsingEncoding:NSUTF8StringEncoding]);
}
}

NSMutableParagraphStyleNSParagraphStyle包括一下属性

  1. alignment //对齐方式
  2. firstLineHeadIndent //首行缩进
  3. headIndent //缩进
  4. tailIndent //尾部缩进
  5. lineBreakMode //断行方式
  6. maximumLineHeight //最大行高
  7. minimumLineHeight //最低行高
  8. lineSpacing //行距
  9. paragraphSpacing //段距
  10. paragraphSpacingBefore //段首空间
  11. baseWritingDirection //句子方向
  12. lineHeightMultiple //可变行高,乘因数。
  13. hyphenationFactor //连字符属性
//   NSParagraphStyleAttributeName 段落的风格(设置首行,行间距,对齐方式什么的)看自己需要什么属性,写什么  
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];  
    paragraphStyle.lineSpacing = 10;// 字体的行间距  
    paragraphStyle.firstLineHeadIndent = 20.0f;//首行缩进  
    paragraphStyle.alignment = NSTextAlignmentJustified;//(两端对齐的)文本对齐方式:(左,中,右,两端对齐,自然)  
    paragraphStyle.lineBreakMode = NSLineBreakByTruncatingTail;//结尾部分的内容以……方式省略 ( "...wxyz" ,"abcd..." ,"ab...yz")  
    paragraphStyle.headIndent = 20;//整体缩进(首行除外)  
    paragraphStyle.tailIndent = 20;//  
    paragraphStyle.minimumLineHeight = 10;//最低行高  
    paragraphStyle.maximumLineHeight = 20;//最大行高  
    paragraphStyle.paragraphSpacing = 15;//段与段之间的间距  
    paragraphStyle.paragraphSpacingBefore = 22.0f;//段首行空白空间/* Distance between the bottom of the previous paragraph (or the end of its paragraphSpacing, if any) and the top of this paragraph. */  
    paragraphStyle.baseWritingDirection = NSWritingDirectionLeftToRight;//从左到右的书写方向(一共➡️三种)  
    paragraphStyle.lineHeightMultiple = 15;/* Natural line height is multiplied by this factor (if positive) before being constrained by minimum and maximum line height. */  
    paragraphStyle.hyphenationFactor = 1;//连字属性 在iOS,唯一支持的值分别为0和1  

具体AttributtedString属性的键值对如下:

 NSFontAttributeName                设置字体属性,默认值:字体:Helvetica(Neue) 字号:12
 NSForegroundColorAttributeNam      设置字体颜色,取值为 UIColor对象,默认值为黑色
 NSBackgroundColorAttributeName     设置字体所在区域背景颜色,取值为 UIColor对象,默认值为nil, 透明色
 NSLigatureAttributeName            设置连体属性,取值为NSNumber 对象(整数),0 表示没有连体字符,1 表示使用默认的连体字符
 NSKernAttributeName                设定字符间距,取值为 NSNumber 对象(整数),正值间距加宽,负值间距变窄
 NSStrikethroughStyleAttributeName  设置删除线,取值为 NSNumber 对象(整数)
 NSStrikethroughColorAttributeName  设置删除线颜色,取值为 UIColor 对象,默认值为黑色
 NSUnderlineStyleAttributeName      设置下划线,取值为 NSNumber 对象(整数),枚举常量 NSUnderlineStyle中的值,与删除线类似
 NSUnderlineColorAttributeName      设置下划线颜色,取值为 UIColor 对象,默认值为黑色
 NSStrokeWidthAttributeName         设置笔画宽度,取值为 NSNumber 对象(整数),负值填充效果,正值中空效果
 NSStrokeColorAttributeName         填充部分颜色,不是字体颜色,取值为 UIColor 对象
 NSShadowAttributeName              设置阴影属性,取值为 NSShadow 对象
 NSTextEffectAttributeName          设置文本特殊效果,取值为 NSString 对象,目前只有图版印刷效果可用:
 NSBaselineOffsetAttributeName      设置基线偏移值,取值为 NSNumber (float),正值上偏,负值下偏
 NSObliquenessAttributeName         设置字形倾斜度,取值为 NSNumber (float),正值右倾,负值左倾
 NSExpansionAttributeName           设置文本横向拉伸属性,取值为 NSNumber (float),正值横向拉伸文本,负值横向压缩文本
 NSWritingDirectionAttributeName    设置文字书写方向,从左向右书写或者从右向左书写
 NSVerticalGlyphFormAttributeName   设置文字排版方向,取值为 NSNumber 对象(整数),0 表示横排文本,1 表示竖排文本
 NSLinkAttributeName                设置链接属性,点击后调用浏览器打开指定URL地址
 NSAttachmentAttributeName          设置文本附件,取值为NSTextAttachment对象,常用于文字图片混排
 NSParagraphStyleAttributeName      设置文本段落排版格式,取值为 NSParagraphStyle 对象

enum {
NSUnderlineStyleNone = 0×00,
NSUnderlineStyleSingle = 0×01,
};设置删除线。

2016/11/21 posted in  TextKit