从iPhone的照片库获取所有图像 [英] To Get all Images from Photo Library in iphone

问题描述

我试图从照片库"中检索图像使用AssetsLibrary在我的应用中显示. 我有照片的URL路径，但我不知道如何通过照片获取照片.

I trying to retrive images from Photo Library & display in my app using AssetsLibrary. I got the URL path of photos but I don't know how to get photo through it.

我的代码如下:

   NSMutableArray* assetURLDictionaries = [[NSMutableArray alloc] init];


   void (^assetEnumerator)( ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger index, BOOL *stop) {
       if(result != nil) {
           if([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {
                [assetURLDictionaries addObject:[result valueForProperty:ALAssetPropertyURLs]];

                NSLog(@"result is:%@",result);
                NSLog(@"asset URLDictionary is:%@",assetURLDictionaries);
                NSURL *url= (NSURL*) [[result defaultRepresentation]url]; 

                [library assetForURL:url
                         resultBlock:^(ALAsset *asset) { [assetsp addObject:asset]; }
                        failureBlock:^(NSError *error){ NSLog(@"test:Fail"); } ]; 
           } 
       }
   };


   NSMutableArray *assetGroups = [[NSMutableArray alloc] init];
   void (^ assetGroupEnumerator) ( ALAssetsGroup *, BOOL *)= ^(ALAssetsGroup *group, BOOL *stop){
        NSLog(@"hi");
        if(group != nil) {
            [group enumerateAssetsUsingBlock:assetEnumerator];
            [assetGroups addObject:group];

            NSLog(@"Number of assets in group :%d",[group numberOfAssets]);           
        }
   };

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

   [library enumerateGroupsWithTypes:ALAssetsGroupAll
                          usingBlock:assetGroupEnumerator
                        failureBlock:^(NSError *error) {NSLog(@"A problem occurred");}];

推荐答案

我的代码如下:

- (void)viewDidLoad
{
    carousel.type = iCarouselTypeCoverFlow2;
    [super viewDidLoad];
    xy =[[NSMutableArray alloc]init];

    NSMutableArray* assetURLDictionaries = [[NSMutableArray alloc] init];

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

    void (^assetEnumerator)( ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger index, BOOL *stop) {
        if(result != nil) {
            if([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {
                [assetURLDictionaries addObject:[result valueForProperty:ALAssetPropertyURLs]];

                NSLog(@"result is:%@",result);
                NSLog(@"asset URLDictionary is:%@",assetURLDictionaries);
                NSURL *url= (NSURL*) [[result defaultRepresentation]url]; 

                [library assetForURL:url
                         resultBlock:^(ALAsset *asset) {
                             [xy addObject:[UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]]];
                             NSLog(@" xy is:%@",xy);
                             image =[ [UIImageView alloc ] initWithImage:[xy objectAtIndex:0]];
                             NSLog(@"image is:%@",image);
                         }
                         failureBlock:^(NSError *error){ NSLog(@"test:Fail"); } ]; 
            } 
        }
    };

    NSMutableArray *assetGroups = [[NSMutableArray alloc] init];
    void (^ assetGroupEnumerator) ( ALAssetsGroup *, BOOL *)= ^(ALAssetsGroup *group, BOOL *stop) {
        NSLog(@"hello");
        if(group != nil) {
            [group enumerateAssetsUsingBlock:assetEnumerator];
            [assetGroups addObject:group];
            NSLog(@"Number of assets in group :%d",[group numberOfAssets]);
            NSLog(@"asset group is:%@",assetGroups);
        }
    };

    assetGroups = [[NSMutableArray alloc] init];

    [library enumerateGroupsWithTypes:ALAssetsGroupAll
             usingBlock:assetGroupEnumerator
             failureBlock:^(NSError *error) {NSLog(@"A problem occurred");}];

这篇关于从iPhone的照片库获取所有图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！