ios - NSString uppercase drawinrect -


do guys have idea why this:

 [self.rightfiletype drawinrect: text2rect withfont: [uifont fontwithname: @"helveticaneue-medium" size: 21.5] linebreakmode: nslinebreakbywordwrapping alignment: nstextalignmentcenter];

and 

 [@"doc" drawinrect: text2rect withfont: [uifont fontwithname: @"helveticaneue-medium" size: 21.5] linebreakmode: nslinebreakbywordwrapping alignment: nstextalignmentcenter];

work, showing correct values but

 [[self.rightfiletype uppercasestring] drawinrect: text2rect withfont: [uifont fontwithname: @"helveticaneue-medium" size: 21.5] linebreakmode: nslinebreakbywordwrapping alignment: nstextalignmentcenter];

is not displaying anything?


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