NSString*_test? =@"首行縮進根據(jù)字體大小自動調(diào)整 間隔可自定根據(jù)需求隨意改變。。。。。。。";

NSMutableParagraphStyle*paraStyle01=?[[NSMutableParagraphStylealloc]init];

paraStyle01.alignment=?NSTextAlignmentLeft;//對齊

paraStyle01.headIndent=0.0f;//行首縮進

//參數(shù)：（字體大小17號字乘以2，34f即首行空出兩個字符）

CGFloat?emptylen?=self.contentLabel.font.pointSize*2;

paraStyle01.firstLineHeadIndent=?emptylen;//首行縮進

paraStyle01.tailIndent=0.0f;//行尾縮進

paraStyle01.lineSpacing=2.0f;//行間距

NSAttributedString*attrText?=?[[NSAttributedStringalloc]initWithString:_testattributes:@{NSParagraphStyleAttributeName:paraStyle01}];

self.contentLabel.attributedText=?attrText;