I have a mutable attributed string without NSStrikethroughStyleAttributeName attribute like this:
NSMutableAttributedString *str1 = [[NSMutableAttributedStri
When you add NSStrikethroughStyleAttributeName, you should also add NSBaselineOffsetAttributeName, which is set to 0. And in swift, you should use the rawValue of NSUnderlineStyle.
NSStrikethroughStyleAttributeName
NSBaselineOffsetAttributeName
NSUnderlineStyl