1 //获取相册的所有图片 2 - (void)reloadImagesFromLibrary 3 { 4     self.images = [[NSMutableArray alloc] init]; 5     dispatch_async(dispatch_get_main_queue(), ^{ 6           7         @autoreleasepool { 8             ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror){ 9                 NSLog(@"相册访问失败 =%@", [myerror localizedDescription]);10                 if ([myerror.localizedDescription rangeOfString:@"Global denied access"].location!=NSNotFound) {11                     NSLog(@"无法访问相册.请在‘设置->定位服务‘设置为打开状态.");12                 }else{13                     NSLog(@"相册访问失败.");14                 }15             };16              17             ALAssetsGroupEnumerationResultsBlock groupEnumerAtion = ^(ALAsset *result, NSUInteger index, BOOL *stop){18                 if (result!=NULL) {19                      20                     if ([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {21                          22                         NSString *urlstr=[NSString stringWithFormat:@"%@",result.defaultRepresentation.url];//图片的url23                         [self.images addObject:urlstr];24                         //NSLog(@"urlStr is %@",urlstr);25                         //result.defaultRepresentation.fullScreenImage//图片的大图26                         //result.thumbnail                             //图片的缩略图小图27                         NSRange range1=[urlstr rangeOfString:@"id="];28                         NSString *resultName=[urlstr substringFromIndex:range1.location+3];29                        resultName=[resultName stringByReplacingOccurrencesOfString:@"&ext=" withString:@"."];//格式demo:123456.png30                         31                     }32                 }33             };34              35             ALAssetsLibraryGroupsEnumerationResultsBlock libraryGroupsEnumeration = ^(ALAssetsGroup* group, BOOL* stop){36                  37                 if (group == nil)38                 {39                      40                 }41                  42                 if (group!=nil) {43                     NSString *g=[NSString stringWithFormat:@"%@",group];//获取相簿的组44                     NSLog(@"gg:%@",g);//gg:ALAssetsGroup - Name:Camera Roll, Type:Saved Photos, Assets count:7145                      46                     NSString *g1=[g substringFromIndex:16 ] ;47                     NSArray *arr=[[NSArray alloc] init];48                     arr=[g1 componentsSeparatedByString:@","];49                     NSString *g2=[[arr objectAtIndex:0] substringFromIndex:5];50                     if ([g2 isEqualToString:@"Camera Roll"]) {51                         g2=@"相机胶卷";52                     }53                     NSString *groupName=g2;//组的name54                      55                     [group enumerateAssetsUsingBlock:groupEnumerAtion];56                 }57                  58             };59              60             ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];61             [library enumerateGroupsWithTypes:ALAssetsGroupAll62                                    usingBlock:libraryGroupsEnumeration63                                  failureBlock:failureblock];64         }65          66     });67 }