//联系人:石虎QQ: 1224614774昵称:嗡嘛呢叭咪哄
一、NSMutableParagraphStyle属性
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
二、NSMutableParagraphStyle实现
/*
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];
