ios-获取系统相簿里边的所有照片

#import <AssetsLibrary/AssetsLibrary.h>

-(void)getImgs{

   

    dispatch_async(dispatch_get_main_queue(), ^{

        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

       

       

        ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror){

            NSLog(@"相册访问失败 =%@", [myerror localizedDescription]);

            if ([myerror.localizedDescription rangeOfString:@"Global denied access"].location!=NSNotFound) {

                  NSLog(@"无法访问相册.请在'设置->定位服务'设置为打开状态.");

            }else{

                NSLog(@"相册访问失败.");

            }

        };

       

        ALAssetsGroupEnumerationResultsBlock groupEnumerAtion = ^(ALAsset *result, NSUInteger index, BOOL *stop){

            if (result!=NULL) {

       

                if ([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {

                   

                    NSString *urlstr=[NSString stringWithFormat:@"%@",result.defaultRepresentation.url];//图片的url

/*result.defaultRepresentation.fullScreenImage//图片的大图

result.thumbnail                             //图片的缩略图小图

//                    NSRange range1=[urlstr rangeOfString:@"id="];

//                    NSString *resultName=[urlstr substringFromIndex:range1.location+3];

//                    resultName=[resultName stringByReplacingOccurrencesOfString:@"&ext=" withString:@"."];//格式demo:123456.png

*/

                   

                  [self._dataArray addObject:urlstr];

                }

            }

          

        };

        ALAssetsLibraryGroupsEnumerationResultsBlock

        libraryGroupsEnumeration = ^(ALAssetsGroup* group, BOOL* stop){

           

            if (group == nil)

            {

               

            }

           

            if (group!=nil) {

                NSString *g=[NSString stringWithFormat:@"%@",group];//获取相簿的组

                NSLog(@"gg:%@",g);//gg:ALAssetsGroup - Name:Camera Roll, Type:Saved Photos, Assets count:71

                NSString *g1=[g substringFromIndex:16 ] ;

                NSArray *arr=[[NSArray alloc] init];

                arr=[g1 componentsSeparatedByString:@","];

                NSString *g2=[[arr objectAtIndex:0] substringFromIndex:5];

                if ([g2 isEqualToString:@"Camera Roll"]) {

                    g2=@"相机胶卷";

                }

                NSString *groupName=g2;//组的name

               

                [group enumerateAssetsUsingBlock:groupEnumerAtion];

            }

           

        };

       

        ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];

        [library enumerateGroupsWithTypes:ALAssetsGroupAll

                               usingBlock:libraryGroupsEnumeration

                             failureBlock:failureblock];

        [library release];     

        [pool release];

    }); 

   

}

//------------------------根据图片的url反取图片－－－－－

  ALAssetsLibrary *assetLibrary=[[ALAssetsLibrary alloc] init];

NSURL *url=[NSURL URLWithString:urlStr];

[assetLibrary assetForURL:url resultBlock:^(ALAsset *asset)  {

                UIImage *image=[UIImage imageWithCGImage:asset.thumbnail];

                cellImageView.image=image;

          

                }failureBlock:^(NSError *error) {

                    NSLog(@"error=%@",error);

            }

             ];