Attributes的NSDctionary设置

attributes最常用的设置就是设置颜色和字体大小，其他效果不是很常用但是也总结一下

  NSDictionary *attributesDictionary     = [NSDictionary dictionary];

    [attributesDictionary setValue:[UIFont systemFontOfSize:18.0] forKey:NSFontAttributeName];//设置字体大小

    [attributesDictionary setValue:[UIColor purpleColor] forKey:NSForegroundColorAttributeName];//设置文字颜色

    [attributesDictionary setValue:[UIColor whiteColor] forKey:NSBackgroundColorAttributeName];//设置背景色

    [attributesDictionary setValue:@5 forKey:NSKernAttributeName];//调整间距

    [attributesDictionary setValue:@(NSUnderlineStyleSingle ) forKey:NSUnderlineStyleAttributeName];//设置下划线(NSUnderlineStyleSingle :单行下划线 NSUnderlineStyleDouble:两行下划线 )

    [attributesDictionary setValue:@(NSUnderlineStyleSingle) forKey:NSStrikethroughStyleAttributeName];//添加删除线(value值和下划线用法相同)

    [attributesDictionary setValue:@0 forKey:NSVerticalGlyphFormAttributeName];//设置横排还是竖排显示，0代表横排显示

    [attributesDictionary setValue:@0.5 forKey:NSObliquenessAttributeName];//设置字体倾斜度

    [attributesDictionary setValue:@1 forKey:NSExpansionAttributeName];//设置扁平化

    //设置阴影：NSShadowAttributeName

    //设置段落样式：NSParagraphStyleAttributeName（数值：nit];

   // paragraph.alignment = NSTextAlignmentCenter;）