NSParagraphStyle行间距

和富文本组合使用

NSMutableParagraphStyle*paragraphStyle = [NSMutableParagraphStylenew]; paragraphStyle.lineSpacing =20.;// 行间距

paragraphStyle.lineHeightMultiple =1.5;// 行高倍数（1.5倍行高）paragraphStyle.firstLineHeadIndent =30.0f;//首行缩进paragraphStyle.minimumLineHeight =10;//最低行高paragraphStyle.maximumLineHeight =20;//最大行高(会影响字体)paragraphStyle.alignment =NSTextAlignmentLeft;// 对齐方式paragraphStyle.defaultTabInterval =144;// 默认Tab 宽度

paragraphStyle.headIndent =20;// 起始 x位置

paragraphStyle.tailIndent =320;// 结束 x位置（不是右边间距，与inset 不一样）paragraphStyle.paragraphSpacing =44.;// 段落间距paragraphStyle.paragraphSpacingBefore =44.;// 段落头部空白(实测与上边的没差啊？)paragraphStyle.lineBreakMode =NSLineBreakByWordWrapping;// 分割模式

/*

    NSLineBreakByWordWrapping = 0,      // Wrap at word boundaries, default

    NSLineBreakByCharWrapping,  // Wrap at character boundaries

    NSLineBreakByClipping,  // Simply clip

    NSLineBreakByTruncatingHead, // Truncate at head of line: "...wxyz"

    NSLineBreakByTruncatingTail, // Truncate at tail of line: "abcd..."

    NSLineBreakByTruncatingMiddle // Truncate middle of line:  "ab...yz"

    */

paragraphStyle.baseWritingDirection =NSWritingDirectionRightToLeft;// 段落方向

/*

    NSWritingDirectionNatural      = -1,    // Determines direction using the Unicode Bidi Algorithm rules P2 and P3

    NSWritingDirectionLeftToRight  =  0,    // Left to right writing direction

    NSWritingDirectionRightToLeft  =  1

    */

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