设置行间距和字间距

行间距

- (NSMutableAttributedString *)lineSpace:(int)height WithString:(NSString *)string{
   NSMutableAttributedString *attributedString1=[[NSMutableAttributedString alloc]initWithString:string];
   NSMutableParagraphStyle *paragraphStyle1=[[NSMutableParagraphStyle alloc]init];
  [paragraphStyle1 setLineSpacing:70];
   [attributedString1 addAttribute:NSParagraphStyleAttributeName value:paragraphStyle1 range:NSMakeRange(0, [string length])];
   return attributedString1;
}

字间距

#import  CoreText/CoreText.h
- (NSMutableAttributedString *)charSpace:(int)width WithString:(NSString *)string {
   NSMutableAttributedString *attributedString =[[NSMutableAttributedString alloc]initWithString:string];
   CFNumberRef num =    CFNumberCreate(kCFAllocatorDefault,kCFNumberSInt8Type,&width);
   [attributedString addAttribute:(id)kCTKernAttributeName value:(__bridge id)num range:NSMakeRange(0,[attributedString length])];
   CFRelease(num);
   return attributedString;
}