Say I have an NSMutableAttributedString .

The string has a varied mix of formatting throughout:

Here is an example:

This string is hell to change in iOS, it really sucks.

However, the font per se is not the font you want.

I want to:

for each and every character, change that character to a specific font (say, Avenir)

#BUT,

for each and every character, keep the mix of other attributions (bold, italic, colors, etc etc) which was previously in place on that character.

How the hell do you do this?

Note:

if you trivially add an attribute "Avenir" over the whole range: it simply deletes all the other attribute ranges, you lose all formatting. Unfortunately, attributes are not, in fact "additive".

Say I have an NSMutableAttributedString .

The string has a varied mix of formatting throughout:

Here is an example:

This string is hell to change in iOS, it really sucks.

However, the font per se is not the font you want.

I want to:

for each and every character, change that character to a specific font (say, Avenir)

BUT,

for each and every character, keep the mix of other attributions (bold, italic, colors, etc etc) which was previously in place on that character.

How the hell do you do this?

Note:

if you trivially add an attribute "Avenir" over the whole range: it simply deletes all the other attribute ranges, you lose all formatting. Unfortunately, attributes are not, in fact "additive".

Say I have an NSMutableAttributedString .

The string has a varied mix of formatting throughout:

Here is an example:

This string is hell to change in iOS, it really sucks.

However, the font per se is not the font you want.

I want to:

for each and every character, change that character to a specific font (say, Avenir)

#BUT,

for each and every character, keep each of the other attributions (bold, italic, colors, etc etc) which was previously in place on that character.

How the hell do you do this?

Note:

if you trivially add an attribute "Avenir" over the whole range: it simply deletes all the other attribute ranges, you lose all formatting. Unfortunately, attributes are not, in fact "additive".

Say I have an NSMutableAttributedString .

The string has a varied mix of formatting throughout:

Here is an example:

This string is hell to change in iOS, it really sucks.

However, the font per se is not the font you want.

I want to:

for each and every character, change that character to a specific font (say, Avenir)

#BUT,

for each and every character, keep the mix of other attributions (bold, italic, colors, etc etc) which was previously in place on that character.

How the hell do you do this?

Note:

if you trivially add an attribute "Avenir" over the whole range: it simply deletes all the other attribute ranges, you lose all formatting. Unfortunately, attributes are not, in fact "additive".

Say I have an NSMutableAttributedString .

The string has a varied mix of formatting throughout:

Here is an example:

This string is hell to change in iOS, it really sucks.

However, the font per se is not the font you want.

I want to:

for each and every character, change that character to a specific font (say, Avenir)

but,

for each character, keep each of the other attributions (bold, italic, colors, etc etc) which was previously in place on that character.

How the hell do you do this?

Note:

if you trivially add an attribute "Avenir" over the whole range: it simply deletes all the other attribute ranges, you lose all formatting. Unfortunately, attributes are not, in fact "additive".

Say I have an NSMutableAttributedString .

The string has a varied mix of formatting throughout:

Here is an example:

This string is hell to change in iOS, it really sucks.

However, the font per se is not the font you want.

I want to:

for each and every character, change that character to a specific font (say, Avenir)

#BUT,

for each and every character, keep each of the other attributions (bold, italic, colors, etc etc) which was previously in place on that character.

How the hell do you do this?

Note:

if you trivially add an attribute "Avenir" over the whole range: it simply deletes all the other attribute ranges, you lose all formatting. Unfortunately, attributes are not, in fact "additive".