ios - Struggling with integrating iAd -

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i have tab bar application have table views sub views. need show ad banner @ bottom above tab bar. ad banner seen , not long time. leaves white view when not available , not. not getting happening here:

i using:

- (void)viewdidload {     [super viewdidload];      cgrect frame=cgrectzero;     frame.size = [adbannerview sizefrombannercontentsizeidentifier:adbannercontentsizeidentifierportrait];     // place frame @ bottom edge of screen out of sight     frame.origin = cgpointmake(0.0, 317);      // create , configure banner view     adbannerview *adview = [[adbannerview alloc] initwithframe:frame];     adview.requiredcontentsizeidentifiers = [nsset setwithobject:adbannercontentsizeidentifierportrait];     // set delegate self, notified of ad responses     adview.delegate = self;     adview.hidden = yes;     [self.view addsubview: adview]; }    - (void)bannerviewdidloadad:(adbannerview *)banner {     nslog(@"ad available");      banner.hidden = no;     // brand new frame     cgrect newframe=cgrectzero;     cgpoint frameorigin=cgpointzero;     // set origin     frameorigin=cgpointmake(0.0, cgrectgetmaxy(self.view.bounds));     newframe.origin=frameorigin;      // set size     newframe.size=[adbannerview sizefrombannercontentsizeidentifier:adbannercontentsizeidentifierportrait];      cgfloat bannerheight = newframe.size.height;     cgfloat banneroffset=0.0;      // determine new frame should     if (!self.isbannervisible)     {         // should visible, raise         banneroffset=-bannerheight;     }      cgrect offsetrect=cgrectoffset(newframe,0.0f,banneroffset);     [uiview animatewithduration:0.2                      animations:^{banner.frame= offsetrect;}                      completion:^(bool finished){                          if (banneroffset<0){                              self.isbannervisible=yes;                          }else{                              self.isbannervisible=no;                          }                      }      ];  }    - (void)bannerview:(adbannerview *)banner didfailtoreceiveadwitherror:(nserror *)error {       nslog(@"error is===>%@",error); }  - (bool)bannerviewactionshouldbegin:(adbannerview *)banner willleaveapplication:(bool)willleave {     return yes; }

sometimes error is:

error domain=aderrordomain code=0 "the operation couldn’t completed. unknown error" userinfo=0x8c53410 {adinternalerrorcode=0, adinternalerrordomain=aderrordomain, nslocalizedfailurereason=unknown error}

sometimes is:

error domain=aderrordomain code=3 "the operation couldn’t completed. ad inventory unavailable" userinfo=0x7e64780 {adinternalerrorcode=3, adinternalerrordomain=aderrordomain, nslocalizedfailurereason=ad inventory unavailable}

please help!!


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