iOS NSMutableParagraphStyle

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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];

谢谢!!!