屬性簡(jiǎn)介:

// NSParagraphStyleAttributeName 段落的風(fēng)格（設(shè)置首行，行間距，對(duì)齊方式什么的）看自己需要什么屬性，寫什么 

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

paragraphStyle.lineSpacing = 10;// 字體的行間距

paragraphStyle.firstLineHeadIndent = 20.0f;//首行縮進(jìn)

paragraphStyle.alignment = NSTextAlignmentJustified;//（兩端對(duì)齊的）文本對(duì)齊方式：（左，中，右，兩端對(duì)齊，自然）

paragraphStyle.lineBreakMode = NSLineBreakByTruncatingTail;//結(jié)尾部分的內(nèi)容以……方式省略 ( "...wxyz" ,"abcd..." ,"ab...yz")

paragraphStyle.headIndent = 20;//整體縮進(jìn)(首行除外)

paragraphStyle.tailIndent = 20;//

paragraphStyle.minimumLineHeight = 10;//最低行高

paragraphStyle.maximumLineHeight = 20;//最大行高

paragraphStyle.paragraphSpacing = 15;//段與段之間的間距

paragraphStyle.paragraphSpacingBefore = 22.0f;//段首行空白空間/* 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;//從左到右的書寫方向（一共??三種）

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;//連字屬性 在iOS，唯一支持的值分別為0和1