how can i use only custom font without family font system on ios

I use CLImageEditor this link, but in the fonts picker it displays the system fonts, I do not want to display it, Because it contains strangely repetitive NewRoman fonts, I have custom fonts, I added to my project and appears in the fonts picker,Custom font that I've added also show with system fonts, how can I hide the system fonts or select specific fonts only, where most of the fonts are similar I do not want to fill font picker withe many fonts.

how can i use only custom font without family font system on ios
 
 
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