Ios--app Custom albums-get pictures from your custom albums

I. Get a single picture idea:

• 1. Use Uiimagepickercontroller to get pictures from your system's own app (Photos \ Camera)
• 2. Set up the agent, abide by the agent agreement
  • 注意This UIImagePickerController class is special and requires compliance with two agent protocols

    @interface ViewController () <UIImagePickerControllerDelegate, UINavigationControllerDelegate>

• 3. Ways to implement ProxiesdidFinishPickingMediaWithInfo

- (void) getimagefromipc{1. Determine if the album can be openedif (![Uiimagepickercontroller issourcetypeavailable:Uiimagepickercontrollersourcetypephotolibrary])Return2. Create a picture selection controllerUiimagepickercontroller *IPC = [[Uiimagepickercontroller alloc] init];/** typedef ns_enum (Nsinteger, Uiimagepickercontrollersourcetype) {uiimagepickercontrollersourcetypephotolibrary,/ /album Uiimagepickercontrollersourcetypecamera,//Camera capture Uiimagepickercontrollersourcetypesavedphotosalbum//albums} */3. Set Open photo album type (show all albums) Ipc.sourcetype =Uiimagepickercontrollersourcetypephotolibrary;Ipc.sourcetype = Uiimagepickercontrollersourcetypesavedphotosalbum;CameraIpc.sourcetype = Uiimagepickercontrollersourcetypecamera;4. Set Proxy ipc.delegate =Self5.modal out of this controller [self presentviewcontroller:ipc animated:YES completion:< Span class= "hljs-literal" >nil];}  #pragma mark--<uiimagepickercontrollerdelegate>--< Span class= "hljs-comment" >//action after getting the picture-(void) Imagepickercontroller: (uiimagepickercontroller *) Picker Didfinishpickingmediawithinfo: ( Nsdictionary<nsstring *,id> *) info{//destruction Controller [Picker Dismissviewcontrolleranimated:yes Completion:nil]; //set picture self.imageview.image = info[ uiimagepickercontrolleroriginalimage];}        

Two. Get multiple picture ideas:

• Import Header File#import <Photos/Photos.h>
• Phasset: A resource, such as a picture \ Video
• Phassetcollection: A photo album
• Phimagemanager Picture Manager, is a singleton, sending a request to get a picture from asset
• Phimagerequestoptions Picture Request Options
• Note: This class is the way iOS8 started to generalize, iOS9 before it started to be discarded.
  Before the system fits IOS8, use the API in the following library

  #import <AssetsLibrary/AssetsLibrary.h>

1. Get the original picture of all albums

- (void) getoriginalimages{Get all Custom albums phfetchresult<phassetcollection *> *assetcollections = [phassetcollectionFetchassetcollectionswithtype:phassetcollectiontypealbumsubtype:phassetcollectionsubtypealbumregular Options:nil]; //Traverse all the custom albums for (Phassetcollection *assetcollection in assetcollections) {[ Self Enumerateassetsinassetcollection:assetcollection Original:yes]; } //Get camera roll phassetcollection *cameraroll = [phassetcollection fetchassetcollectionswithtype: Phassetcollectiontypesmartalbum subtype:phassetcollectionsubtypesmartalbumuserlibrary Options:nil]. Lastobject; //traverse the camera roll to get a larger image [self enumerateassetsinassetcollection:cameraroll original:yes];}    

2. Get thumbnails from all albums

- (void) getthumbnailimages{Get all Custom albums phfetchresult<phassetcollection *> *assetcollections = [phassetcollectionfetchassetcollectionswithtype:phassetcollectiontypealbum  Subtype:phassetcollectionsubtypealbumregular options:nil]; //traverse all custom albums for (phassetcollection *assetcollection in assetcollections) {[Self enumerateassetsinassetcollection: Assetcollection original:no]; } //get camera roll phassetcollection *cameraroll = [phassetcollection  Fetchassetcollectionswithtype:phassetcollectiontypesmartalbum subtype: Phassetcollectionsubtypesmartalbumuserlibrary options:nil].lastobject; [Self enumerateassetsinassetcollection:cameraroll original: NO];}              

3. Traverse the album

/** * Traverse all pictures in the album *@param assetcollection Photo Album *@param original If you want the original */-(voidEnumerateassetsinassetcollection: (phassetcollection *) assetcollectionOriginal: (BOOL) original{NSLog (@"Photo Album name:%@", assetcollection.localizedtitle); Phimagerequestoptions *options = [[Phimagerequestoptions alloc] init];Synchronize to get the picture, will only return 1 pictures options.synchronous = YES;//Get all Phasset objects in a photo album Phfetchresult<phasset *> *assets = [Phasset fetchassetsinassetcollection: Assetcollection Options:nil]; For (Phasset *asset in assets) { //Do you want the original cgsize size = original? Cgsizemake (Asset.pixelwidth, asset.pixelheight): Cgsizezero; //Get pictures from asset [[Phimagemanager Defaultmanager] requestimageforasset:asset targetsize:size  Contentmode:phimagecontentmodedefault options:options resulthandler:^ (UIImage * _nullable result, Nsdictionary * _nullable info) {NSLog (@"%@", result);}]; }}

 

Ios--app Custom Albums-get pictures from your custom albums