iOS for Avatar selection (photo or photo gallery), size, etc Zoom, create a circle avatar

//Eject Actionsheet. Choose how to get your avatar



//get pictures from albums-(void) Takepictureclick: (UIButton *) sender{//*/* NOTE: The following protocols are required for use: Uiimagepickercontrollerdelegate,//uinavigationcontrollerdelegate//     *///Uiimagepickercontroller *picker = [[Uiimagepickercontroller alloc]init];//    //set up a picture source (Photo album)//picker.sourcetype = uiimagepickercontrollersourcetypesavedphotosalbum;//    //Set up proxy//picker.delegate = self;//    //settings can be edited//picker.allowsediting = YES;//    //Open the Picker interface//[self presentviewcontroller:picker animated:yes completion:nil];uiactionsheet* Actionsheet =[[Uiactionsheet alloc] Initwithtitle:@"Please select a file source"                                  Delegate: Self cancelbuttontitle:@"Cancel"destructivebuttontitle:nil otherbuttontitles:@"Camera",@"Camera",@"Local Albums",@"Local Video", nil];    [Actionsheet ShowInView:self.view]; }#pragmaMark-#pragmaUiactionsheet delegate-(void) Actionsheet: (Uiactionsheet *) Actionsheet Clickedbuttonatindex: (nsinteger) buttonindex{NSLog (@"Buttonindex = [%d]", Buttonindex); Switch(buttonindex) { Case 0://Camera{Uiimagepickercontroller*imagepicker =[[Uiimagepickercontroller alloc] init]; Imagepicker.Delegate=Self ; Imagepicker.allowsediting=YES; Imagepicker.sourcetype=Uiimagepickercontrollersourcetypecamera;//[self presentmodalviewcontroller:imagepicker animated:yes];[self presentviewcontroller:imagepicker animated:yes completion:nil]; }             Break;  Case 1://Camera{Uiimagepickercontroller*imagepicker =[[Uiimagepickercontroller alloc] init]; Imagepicker.Delegate=Self ; Imagepicker.allowsediting=YES; Imagepicker.sourcetype=Uiimagepickercontrollersourcetypecamera; Imagepicker.videoquality=Uiimagepickercontrollerqualitytypelow;//[self presentmodalviewcontroller:imagepicker animated:yes];[self presentviewcontroller:imagepicker animated:yes completion:nil]; }             Break;  Case 2://Local Albums{Uiimagepickercontroller*imagepicker =[[Uiimagepickercontroller alloc] init]; Imagepicker.Delegate=Self ; Imagepicker.allowsediting=YES; Imagepicker.sourcetype=uiimagepickercontrollersourcetypephotolibrary;//[self presentmodalviewcontroller:imagepicker animated:yes];[self presentviewcontroller:imagepicker animated:yes completion:nil]; }             Break;  Case 3://Local Video{Uiimagepickercontroller*imagepicker =[[Uiimagepickercontroller alloc] init]; Imagepicker.Delegate=Self ; Imagepicker.allowsediting=YES; Imagepicker.sourcetype=uiimagepickercontrollersourcetypephotolibrary;//[self presentmodalviewcontroller:imagepicker animated:yes];[self presentviewcontroller:imagepicker animated:yes completion:nil]; }             Break; default:             Break; }}#pragmaMark-#pragmaUiimagepickercontroller delegate-(void) Imagepickercontroller: (Uiimagepickercontroller *) Picker Didfinishpickingmediawithinfo: (NSDictionary *) info{if([[Info Objectforkey:uiimagepickercontrollermediatype] isequaltostring: (__bridge NSString *) Kuttypeimage]) {UIImage*img =[Info objectforkey:uiimagepickercontrollereditedimage]; [Self performselector: @selector (saveimage:) withobject:img afterdelay:0.5]; }    Else if([[Info Objectforkey:uiimagepickercontrollermediatype] isequaltostring: (__bridge NSString *) Kuttypemovie]) {nsstring*videopath =[[Info objectforkey:uiimagepickercontrollermediaurl] path]; Self.filedata=[NSData Datawithcontentsoffile:videopath]; }//[Picker dismissmodalviewcontrolleranimated:yes];[Picker Dismissviewcontrolleranimated:yes completion:nil];}- (void) Imagepickercontrollerdidcancel: (Uiimagepickercontroller *) picker{//[Picker dismissmodalviewcontrolleranimated:yes];[Picker Dismissviewcontrolleranimated:yes completion:nil];}- (void) SaveImage: (UIImage *) Image {//NSLog (@ "Save Avatar!    "); //[Userphotobutton setimage:image forstate:uicontrolstatenormal];BOOL Success; Nsfilemanager*filemanager =[Nsfilemanager Defaultmanager]; Nserror*error; Nsarray*paths =nssearchpathfordirectoriesindomains (NSDocumentDirectory, Nsuserdomainmask, YES); NSString*documentsdirectory = [Paths Objectatindex:0]; NSString*imagefilepath = [Documentsdirectory stringbyappendingpathcomponent:@"selfphoto.jpg"]; NSLog (@"imagefile->>%@", Imagefilepath); Success=[FileManager Fileexistsatpath:imagefilepath]; if(Success) {Success= [FileManager Removeitematpath:imagefilepath error:&ERROR]; }//UIImage *smallimage=[self scalefromimage:image tosize:cgsizemake (80.0f, 80.0f)];//change picture size to 80*80UIImage *smallimage = [Self thumbnailwithimagewithoutscale:image size:cgsizemake ( the, the)]; [UIImageJPEGRepresentation (Smallimage,1.0f) Writetofile:imagefilepath Atomically:yes];//Write FileUIImage *selfphoto = [UIImage Imagewithcontentsoffile:imagefilepath];//reading a picture file//[Userphotobutton Setimage:selfphoto forstate:uicontrolstatenormal];Self.img.image =Selfphoto;}//change the size of the image to easily upload the server-(UIImage *) Scalefromimage: (UIImage *) Image tosize: (cgsize) size{uigraphicsbeginimagecontext (size); [Image Drawinrect:cgrectmake (0,0, Size.width, Size.Height)]; UIImage*newimage =Uigraphicsgetimagefromcurrentimagecontext ();    Uigraphicsendimagecontext (); returnnewimage;}

2. Maintain the aspect ratio of the original image to create a picture of the desired size

//2. Maintain the original aspect ratio to generate a thumbnail image-(UIImage *) Thumbnailwithimagewithoutscale: (UIImage *) Image size: (cgsize) asize{UIImage*NewImage; if(Nil = =image) {NewImage=Nil; }    Else{cgsize oldsize=image.size;        CGRect rect; if(Asize.width/asize.height > oldsize.width/oldsize.height) {rect.size.width= asize.height*oldsize.width/Oldsize.height; Rect.size.height=Asize.height; Rect.origin.x= (asize.width-rect.size.width)/2; RECT.ORIGIN.Y=0; }        Else{rect.size.width=Asize.width; Rect.size.height= asize.width*oldsize.height/Oldsize.width; Rect.origin.x=0; RECT.ORIGIN.Y= (asize.height-rect.size.height)/2;        } uigraphicsbeginimagecontext (Asize); Cgcontextref Context=Uigraphicsgetcurrentcontext ();        Cgcontextsetfillcolorwithcolor (context, [[Uicolor Clearcolor] cgcolor]); Uirectfill (CGRectMake (0,0, Asize.width, asize.height));//Clear Background[Image Drawinrect:rect]; NewImage=Uigraphicsgetimagefromcurrentimagecontext ();    Uigraphicsendimagecontext (); }    returnnewimage;}

3. Show the Circle head

Nsarray *paths =nssearchpathfordirectoriesindomains (NSDocumentDirectory, Nsuserdomainmask, YES); NSString*documentsdirectory = [Paths Objectatindex:0]; NSString*imagefilepath = [Documentsdirectory stringbyappendingpathcomponent:@"selfphoto.jpg"]; NSLog (@"imagefile->>%@", Imagefilepath); UIImage*selfphoto = [UIImage Imagewithcontentsoffile:imagefilepath];//Self.img.image =Selfphoto; [Self.img.layer setcornerradius:cgrectgetheight ([self.img bounds])/2]; Modify the radius to realize the circle of the Avatar Self.img.layer.masksToBounds= YES;

Hope to be helpful to everyone if you have a better way of achieving it. please tell me.