iphone - How to get the font-size or a bold-version of UIFont instance -


how font-size of uifont instance?

or, if can implement method uifont? 

- (uifont *)boldfont;

uifontdescriptor pretty powerful class , can used bold version of font want. should totally safe , future proof requires usage of public api , doesn't depend on string modifications.

here code in swift 3:

extension uifont {      func bold() -> uifont? {          let fontdescriptorsymbolictraits: uifontdescriptorsymbolictraits = [fontdescriptor.symbolictraits, .traitbold]          let bondfontdescriptor = fontdescriptor.withsymbolictraits(fontdescriptorsymbolictraits)          return bondfontdescriptor.flatmap { uifont(descriptor: $0, size: pointsize) }     }  }

here code in objective-c:

@implementation uifont (raboldfont)  - (uifont *)ra_boldfont {     uifontdescriptor *fontdescriptor = [self fontdescriptor];     uifontdescriptorsymbolictraits traits = fontdescriptor.symbolictraits;     traits = traits | uifontdescriptortraitbold;     uifontdescriptor *boldfontdescriptor = [fontdescriptor fontdescriptorwithsymbolictraits:traits];     return [uifont fontwithdescriptor:boldfontdescriptor size:self.pointsize]; }  @end

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