Nsattributedstring with different NSMutableParagraphStyle - ios

Question

I have 1 attributed string with multiple paragraph.
I had given the FirstLineHeadIndent = 2.12.
Now I want to give the FirstLineHeadIndent=0 to 1st paragraph
and FirstLineHeadIndent=2 to 2nd paragraph in the attributed string.
If I set the property like
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing =Line_space;
paragraphStyle.firstLineHeadIndent =2;
paragraphStyle.headIndent =margin_space;
paragraphStyle.tailIndent =-margin_space;
paragraphStyle.paragraphSpacing=paragraph_space;
NSDictionary *ats = #{
NSFontAttributeName : [UIFont fontWithName:self.bookView.defaultFontFamily size:self.bookView.defaultFontSize],
NSParagraphStyleAttributeName : paragraphStyle,
};
It will give the head space to both the paragaraph.
Please help me.
I am uploading the image for more help:-

Answer 1

So, the solution is to use 2 paragraph styles.
Your NSString is separated by a \n, that indicate the separations between the 2 paragraphs.
NSMutableParagraphStyle *firstParagraphStyle = [[NSMutableParagraphStyle alloc] init];
[firstParagraphStyle setFirstLineHeadIndent:0];
//Do the rest of the settings
NSMutableParagraphStyle *secondParagraphStyle = [[NSMutableParagraphStyle alloc] init];
[secondParagraphStyle setFirstLineHeadIndent:2];
//Do the rest of the settings
//You may use the same paragraphStyle, changing just the firstLineHeadIndent, and set the attributes, but for a clearer explanation, I used 2 paragraph styles
NSRange range = [[yourAttributedString string] rangeOfString:#"\n"];
[yourAttributedString addAttribute:NSParagraphStyleAttributeName value: firstParagraphStyle range:NSMakeRange(0, range.location)]; //The range is from the start to the \n
[yourAttributedString addAttribute:NSParagraphStyleAttributeName value: secondParagraphStyle range:NSMakeRange(range.location, [[yourAttributedString string] length]-range.location)]; //The range is from the start of \n to the end