ios - MFMailComposeViewController not working on device , instance printed on console output is <register sp is not available> -

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i have created utility class called mailcomposeviewcontroller cllling class other view controller, mail composer working on simulater is crashing on device.

this way calling function

       nslog(@"mail");     mailcomposeviewcontroller *mailcomposer =[[mailcomposeviewcontroller alloc]init];     [mailcomposer showpicker:self andimage:md.img_savedimageaftereffect];

below utility class contains code send mail functionility

      #import "mailcomposeviewcontroller.h"        uiviewcontroller *controller;       @implementation mailcomposeviewcontroller         -(void)showpicker:(id)viewcontroller andimage:(uiimage*)image;      {          controller = viewcontroller;             class mailclass = (nsclassfromstring(@"mfmailcomposeviewcontroller"));          if (mailclass != nil)         {              // must check whether current device configured sending emails             if ([mailclass cansendmail])            {                [self displaycomposersheet:viewcontroller andimage:image];            }            else            {                //[self launchmailappondevice];               [self displaycomposersheet:viewcontroller andimage:image];           }       }      else      {         //[self launchmailappondevice];         [self displaycomposersheet:viewcontroller andimage:image];      }    }    -(void)displaycomposersheet:(id)viewcontroller andimage:(uiimage*)image    {       mfmailcomposeviewcontroller *picker = [[mfmailcomposeviewcontroller alloc] init];      picker.mailcomposedelegate = self;        nsdata *mydata = uiimagejpegrepresentation(image,0.9);      [picker addattachmentdata:mydata mimetype:@"image/jpg" filename:@""];        picker.modalpresentationstyle = uimodalpresentationformsheet;       picker.modaltransitionstyle = uimodaltransitionstylecoververtical;       [viewcontroller presentmodalviewcontroller:picker animated:yes];     [picker release];   }       // dismisses email composition interface when users tap cancel or send. proceeds      update   message field result of operation.   - (void)mailcomposecontroller:(mfmailcomposeviewcontroller*)controller didfinishwithresult:     (mfmailcomposeresult)result error:(nserror*)error   {       //message.hidden = no;      // notifies users errors associated interface      switch (result)      {          case mfmailcomposeresultcancelled:          // message.text = @"result: canceled";          break;          case mfmailcomposeresultsaved:          // message.text = @"result: saved";          break;          case mfmailcomposeresultsent:          //message.text = @"result: sent";          break;          case mfmailcomposeresultfailed:          // message.text = @"result: failed";          break;         default:             // message.text = @"result: not sent";         break;      }    [controller dismissmodalviewcontrolleranimated:yes];  }     - (void)viewdidload    {          [super viewdidload];      // additional setup after loading view.   }    - (void)didreceivememorywarning   {       [super didreceivememorywarning];       // dispose of resources can recreated.   }    @end

crash snap shot

  crash report   uikit`-[uiviewcontroller presentmodalviewcontroller:animated:]:   0x3a4d5238:  push   {r7, lr}  0x3a4d523a:  mov    r7, sp  0x3a4d523c:  sub    sp, #4  0x3a4d523e:  movw   r1, #18934     0x3a4d5242:  mov.w  r9, #0   0x3a4d5246:  movt   r1, #525   0x3a4d524a:  str.w  r9, [sp]   0x3a4d524e:  add    r1, pc   0x3a4d5250:  ldr    r1, [r1]    0x3a4d5252:  blx    0x3a734ce4                ; symbol stub for:      -[_uihostedtextservicesession    dismisstextserviceanimated:]   0x3a4d5256:  add    sp, #4   0x3a4d5258:  pop    {r7, pc}   0x3a4d525a:  nop

instances of view controller , mailcontroller printed on console printing description of viewcontroller: printing description of picker: (mfmailcomposeviewcontroller *) picker =


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