image - Photo uploads from my iOS app are being rotated -

i have ios app building. when upload portrait image server, , server resizes image, image rotated landscape. happens iphone uploads. uploading desktop app works fine. why happening, , how can correct it?

@andew

create 1 category of uiimage.. write code in uiimage+fixorientation.h file

#import <uikit/uikit.h>  @interface uiimage (fixorientation) - (uiimage *)fixorientation; @end 

and in #import "uiimage+fixorientation.h" file

#import "uiimage+fixorientation.h"  @implementation uiimage (fixorientation) - (uiimage *)fixorientation {      // no-op if orientation correct     if (self.imageorientation == uiimageorientationup) return self;      // need calculate proper transformation make image upright.     // in 2 steps: rotate if left/right/down, , flip if mirrored.     cgaffinetransform transform = cgaffinetransformidentity;      switch (self.imageorientation) {         case uiimageorientationdown:         case uiimageorientationdownmirrored:             transform = cgaffinetransformtranslate(transform, self.size.width, self.size.height);             transform = cgaffinetransformrotate(transform, m_pi);             break;          case uiimageorientationleft:         case uiimageorientationleftmirrored:             transform = cgaffinetransformtranslate(transform, self.size.width, 0);             transform = cgaffinetransformrotate(transform, m_pi_2);             break;          case uiimageorientationright:         case uiimageorientationrightmirrored:             transform = cgaffinetransformtranslate(transform, 0, self.size.height);             transform = cgaffinetransformrotate(transform, -m_pi_2);             break;         case uiimageorientationup:         case uiimageorientationupmirrored:             break;     }      switch (self.imageorientation) {         case uiimageorientationupmirrored:         case uiimageorientationdownmirrored:             transform = cgaffinetransformtranslate(transform, self.size.width, 0);             transform = cgaffinetransformscale(transform, -1, 1);             break;          case uiimageorientationleftmirrored:         case uiimageorientationrightmirrored:             transform = cgaffinetransformtranslate(transform, self.size.height, 0);             transform = cgaffinetransformscale(transform, -1, 1);             break;         case uiimageorientationup:         case uiimageorientationdown:         case uiimageorientationleft:         case uiimageorientationright:             break;     }      // draw underlying cgimage new context, applying transform     // calculated above.     cgcontextref ctx = cgbitmapcontextcreate(null, self.size.width, self.size.height,                                              cgimagegetbitspercomponent(self.cgimage), 0,                                              cgimagegetcolorspace(self.cgimage),                                              cgimagegetbitmapinfo(self.cgimage));     cgcontextconcatctm(ctx, transform);     switch (self.imageorientation) {         case uiimageorientationleft:         case uiimageorientationleftmirrored:         case uiimageorientationright:         case uiimageorientationrightmirrored:             // grr...             cgcontextdrawimage(ctx, cgrectmake(0,0,self.size.height,self.size.width), self.cgimage);             break;          default:             cgcontextdrawimage(ctx, cgrectmake(0,0,self.size.width,self.size.height), self.cgimage);             break;     }      // , create new uiimage drawing context     cgimageref cgimg = cgbitmapcontextcreateimage(ctx);     uiimage *img = [uiimage imagewithcgimage:cgimg];     cgcontextrelease(ctx);     cgimagerelease(cgimg);     return img; }  @end 

and in delegate method.. use [img **fixorientation**]; method

#pragma mark - camera imagepickercontroller delegates - (void)imagepickercontroller:(uiimagepickercontroller *)picker1 didfinishpickingmediawithinfo:(nsdictionary *)info {     [picker1 dismissviewcontrolleranimated:yes completion:nil];      nsstring *mediatype = info[uiimagepickercontrollermediatype];      if ([mediatype isequaltostring:(nsstring *)kuttypeimage])     {         uiimage *img=info[uiimagepickercontrollereditedimage];          //use method         [img fixorientation];          //here can perfect image         [imguserimage setimage:img];     } } 

another solution

//i found solution, may helpful you

//call method

image = [self scaleandrotateimage:image];

- (void)scaleandrotateimage:(uiimage *)image {     int kmaxresolution = 320; // or whatever      cgimageref imgref = image.cgimage;      cgfloat width = cgimagegetwidth(imgref);     cgfloat height = cgimagegetheight(imgref);      cgaffinetransform transform = cgaffinetransformidentity;     cgrect bounds = cgrectmake(0, 0, width, height);     if (width > kmaxresolution || height > kmaxresolution) {         cgfloat ratio = width/height;         if (ratio > 1) {             bounds.size.width = kmaxresolution;             bounds.size.height = bounds.size.width / ratio;         }         else {             bounds.size.height = kmaxresolution;             bounds.size.width = bounds.size.height * ratio;         }     }      cgfloat scaleratio = bounds.size.width / width;     cgsize imagesize = cgsizemake(cgimagegetwidth(imgref), cgimagegetheight(imgref));     cgfloat boundheight;     uiimageorientation orient = image.imageorientation;     switch(orient) {          case uiimageorientationup: //exif = 1             transform = cgaffinetransformidentity;             break;          case uiimageorientationupmirrored: //exif = 2             transform = cgaffinetransformmaketranslation(imagesize.width, 0.0);             transform = cgaffinetransformscale(transform, -1.0, 1.0);             break;          case uiimageorientationdown: //exif = 3             transform = cgaffinetransformmaketranslation(imagesize.width, imagesize.height);             transform = cgaffinetransformrotate(transform, m_pi);             break;          case uiimageorientationdownmirrored: //exif = 4             transform = cgaffinetransformmaketranslation(0.0, imagesize.height);             transform = cgaffinetransformscale(transform, 1.0, -1.0);             break;          case uiimageorientationleftmirrored: //exif = 5             boundheight = bounds.size.height;             bounds.size.height = bounds.size.width;             bounds.size.width = boundheight;             transform = cgaffinetransformmaketranslation(imagesize.height, imagesize.width);             transform = cgaffinetransformscale(transform, -1.0, 1.0);             transform = cgaffinetransformrotate(transform, 3.0 * m_pi / 2.0);             break;          case uiimageorientationleft: //exif = 6             boundheight = bounds.size.height;             bounds.size.height = bounds.size.width;             bounds.size.width = boundheight;             transform = cgaffinetransformmaketranslation(0.0, imagesize.width);             transform = cgaffinetransformrotate(transform, 3.0 * m_pi / 2.0);             break;          case uiimageorientationrightmirrored: //exif = 7             boundheight = bounds.size.height;             bounds.size.height = bounds.size.width;             bounds.size.width = boundheight;             transform = cgaffinetransformmakescale(-1.0, 1.0);             transform = cgaffinetransformrotate(transform, m_pi / 2.0);             break;          case uiimageorientationright: //exif = 8             boundheight = bounds.size.height;             bounds.size.height = bounds.size.width;             bounds.size.width = boundheight;             transform = cgaffinetransformmaketranslation(imagesize.height, 0.0);             transform = cgaffinetransformrotate(transform, m_pi / 2.0);             break;          default:             [nsexception raise:nsinternalinconsistencyexception format:@"invalid image orientation"];      }      uigraphicsbeginimagecontext(bounds.size);      cgcontextref context = uigraphicsgetcurrentcontext();      if (orient == uiimageorientationright || orient == uiimageorientationleft) {         cgcontextscalectm(context, -scaleratio, scaleratio);         cgcontexttranslatectm(context, -height, 0);     }     else {         cgcontextscalectm(context, scaleratio, -scaleratio);         cgcontexttranslatectm(context, 0, -height);     }      cgcontextconcatctm(context, transform);      cgcontextdrawimage(uigraphicsgetcurrentcontext(), cgrectmake(0, 0, width, height), imgref);     uiimage *imagecopy = uigraphicsgetimagefromcurrentimagecontext();     uigraphicsendimagecontext();      [self setrotatedimage:imagecopy];     //return imagecopy; }