ios - Unable to set Outlet Value TopViewController of NavigationController in PreapreForSegue -


my project has following scenario:

[preview view controller] --(modal)--> navigation controller --(top)--> [photo setting view controller]

in [preview view controller], have button perform modal segue (identifier="previewtosetting"), have in [preview view controller].m file define prepareforsegue method:

- (void)prepareforsegue:(uistoryboardsegue *) segue sender:(id)sender {     if ([segue.identifier isequaltostring:@"previewtosetting"]) {         uinavigationcontroller *unc=segue.destinationviewcontroller;         photosettingviewcontroller *psvc=(photosettingviewcontroller *) unc.topviewcontroller;         psvc.lblaudio.text=@"test";     } }

i set breakpoint in procedure , did see above block running without error. segue perform , lead me "photo setting" scene, text of lblaudio not set "test" thought should be, knows why?

some more information:

  • lblaudio uilabel outlet property in photosettingviewcontroller (uitableviewcontroller subclass) in static table cell within table section

  • lblaudio sycthesized , defined as

    @property (strong,nonatomic)iboutlet uilabel *lblaudio;

  • the lblaudio iboutlet bind such if redefine text property in viewwillappear method self.lblaudio.text=@"test", label text changed "test".

as property iboutlet @ time of segue not initialized. try

create 1 property text of label nsstring *labeltext , assign value @"test" property , in viewwillappear: method assign label work


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