IOS get pictures and crop from camera or album

/load user image-(void) uesrimageclicked {uiactionsheet *sheet;         Determine if the camera is supported if ([Uiimagepickercontroller Issourcetypeavailable:uiimagepickercontrollersourcetypecamera]) { sheet = [[Uiactionsheet alloc] initwithtitle:@ "Select Image" Delegate:self cancelbuttontitle:nil destructivebuttontitle:@ "Cancel"     otherbuttontitles:@ "Photo", @ "select from album", Nil]; } else {sheet = [[Uiactionsheet alloc] initwithtitle:@ "Select Image" Delegate:self cancelbuttontitle:nil DESTRUCTIVEB     uttontitle:@ "Cancel" otherbuttontitles:@ "Select from album", Nil];           } Sheet.tag = 255; [Sheet ShowInView:self.view]; } #pragma mark-action sheet delegte-(void) Actionsheet: (Uiactionsheet *) Actionsheet Clickedbuttonatindex: (nsintege R) Buttonindex {if (Actionsheet.tag = = 255) {Nsuinteger sourcetype = Uiimagepickercontrollersourcetypephotoli         Brary;             Determine if the camera is supported if ([Uiimagepickercontroller Issourcetypeavailable:uiimagepickercontrollersourcetypecamera]) {Switch (buttonindex) {case 0:return;                     Case 1://Camera sourcetype = Uiimagepickercontrollersourcetypecamera;                 Break                     Case 2://album sourcetype = Uiimagepickercontrollersourcetypephotolibrary;             Break             }} else {if (Buttonindex = = 0) {return;             } else {sourcetype = Uiimagepickercontrollersourcetypesavedphotosalbum; }}//Jump to camera or album page Uiimagepickercontroller *imagepickercontroller = [[Uiimagepickercontroller allo         c] init];         Imagepickercontroller.delegate = self;         imagepickercontroller.allowsediting = YES;                   Imagepickercontroller.sourcetype = sourcetype;     [Self Presentviewcontroller:imagepickercontroller Animated:yes completion:^{}]; }} #pragma mark-image picker delegte-(void) ImagepiCkercontroller: (Uiimagepickercontroller *) Picker Didfinishpickingmediawithinfo: (nsdictionary *) info {[Picker           Dismissviewcontrolleranimated:yes completion:^{}];         UIImage *image = [info uiimagepickercontrolleroriginalimage];           Userimageview.image = image;     NSData *imagedata = uiimagejpegrepresentation (image, Compressed_rate);           UIImage *compressedimage = [UIImage imagewithdata:imagedata];       [Httprequestmanager uploadimage:compressedimage httpClient:self.httpClient delegate:self];        }//load user image-(void) uesrimageclicked{uiactionsheet *sheet; Determine if the camera is supported if ([Uiimagepickercontroller Issourcetypeavailable:uiimagepickercontrollersourcetypecamera]) {She ET = [[Uiactionsheet alloc] initwithtitle:@ "Select Image" Delegate:self cancelbuttontitle:nil destructivebuttontitle:@ "Cancel"    otherbuttontitles:@ "Photo", @ "select from album", Nil]; } else {sheet = [[Uiactionsheet alloc] initwithtitle:@ "Select Image" Delegate:self cancelbuttontitle:nil destructivebuttontitle:@ "Cancel" otherbuttontitles:@ "Select from album", Nil];        } Sheet.tag = 255;  [Sheet ShowInView:self.view];} #pragma mark-action sheet delegte-(void) Actionsheet: (Uiactionsheet *) Actionsheet Clickedbuttonatindex: (Nsinteger) buttonindex{if (Actionsheet.tag = = 255) {Nsuinteger sourcetype = uiimagepickercontrollersourcetypephotolibrary        ;            Determine if the camera is supported if ([Uiimagepickercontroller Issourcetypeavailable:uiimagepickercontrollersourcetypecamera]) {                Switch (buttonindex) {case 0:return;                    Case 1://Camera sourcetype = Uiimagepickercontrollersourcetypecamera;                Break                    Case 2://album sourcetype = Uiimagepickercontrollersourcetypephotolibrary;            Break            }} else {if (Buttonindex = = 0) {return; } else {sourcetype = UiimagepickercontrollersourCetypesavedphotosalbum; }}//Jump to camera or album page Uiimagepickercontroller *imagepickercontroller = [[Uiimagepickercontroller alloc] I        NIT];        Imagepickercontroller.delegate = self;        imagepickercontroller.allowsediting = YES;                Imagepickercontroller.sourcetype = sourcetype;    [Self Presentviewcontroller:imagepickercontroller Animated:yes completion:^{}]; }} #pragma mark-image picker delegte-(void) Imagepickercontroller: (Uiimagepickercontroller *) picker        Didfinishpickingmediawithinfo: (nsdictionary *) info{[picker Dismissviewcontrolleranimated:yes completion:^{}];       UIImage *image = [info uiimagepickercontrolleroriginalimage];        Userimageview.image = image;    NSData *imagedata = uiimagejpegrepresentation (image, Compressed_rate);        UIImage *compressedimage = [UIImage imagewithdata:imagedata];    [Httprequestmanager uploadimage:compressedimage httpClient:self.httpClient delegate:self]; }

The returned image is not a square and displays a noticeable stretch in the view of the user's avatar. Studied for a long time various cutting algorithms, and even want to create a view to deal with. Suddenly found in the code from the camera, album to take pictures of the

Uiimagepickercontrolleroriginalimage

So I followed it in a look:

Uikit_extern nsstring *const Uiimagepickercontrollermediatype; An nsstring (UTI, i.e. Kuttypeimage)

Uikit_extern nsstring *const uiimagepickercontrolleroriginalimage; A UIImage

Uikit_extern nsstring *const uiimagepickercontrollereditedimage; A UIImage

Uikit_extern nsstring *const Uiimagepickercontrollercroprect; An Nsvalue (CGRect)

Uikit_extern nsstring *const Uiimagepickercontrollermediaurl; An Nsurl

Uikit_extern nsstring *const uiimagepickercontrollerreferenceurl Ns_available_ios (4_1); An Nsurl-references an

Change Uiimagepickercontrolleroriginalimage to Uiimagepickercontrollereditedimage, everything is done.

IOS get pictures and crop from camera or album