在iPhone中获取图片库中的所有图像

我试图从照片库中检索图像，并使用AssetsLibrary在我的应用程序中显示。 我得到了照片的URLpath，但我不知道如何通过它的照片。

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");}]; 

Answer 1

这段代码是从这里的一些ELCImagePickerController例子中获取的。一些修改是为了简化而完成的。

愿这能帮助你

 [self.assetGroup enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) { if(result == nil) return; UIImageView *assetImageView = [[UIImageView alloc] initWithFrame:viewFrames]; [assetImageView setContentMode:UIViewContentModeScaleToFill]; [assetImageView setImage:[UIImage imageWithCGImage:[result thumbnail]]]; }]; 

快乐编码:)

新的答案

只是使用

 [UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]] 

直接存储图像，而不是在资产中存储资产时存储资产

如下所示

 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) { //Your line //[assetsp addObject:asset]; //My Changed line will store image directly to assetsp [assetsp addObject:[UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]]]; } failureBlock:^(NSError *error){ NSLog(@"test:Fail"); } ]; } } }; 

新答案1

尝试使用此代码将ALAsset数据存储在可变数组中

 NSMutableArray *returnArray = [[NSMutableArray alloc] init]; for(ALAsset *asset in _assets) { NSMutableDictionary *workingDictionary = [[NSMutableDictionary alloc] init]; [workingDictionary setObject:[asset valueForProperty:ALAssetPropertyType] forKey:@"UIImagePickerControllerMediaType"]; [workingDictionary setObject:[UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]] forKey:@"UIImagePickerControllerOriginalImage"]; [workingDictionary setObject:[[asset valueForProperty:ALAssetPropertyURLs] valueForKey:[[[asset valueForProperty:ALAssetPropertyURLs] allKeys] objectAtIndex:0]] forKey:@"UIImagePickerControllerReferenceURL"]; [returnArray addObject:workingDictionary]; 

并在UIImageView中获取图像只是做到这一点

 NSDictionary *dict = [info objectAtIndex:i]; UIImageView *imageview = [[UIImageView alloc] initWithImage:[dict objectForKey:UIImagePickerControllerOriginalImage]]; [imageview setContentMode:UIViewContentModeScaleAspectFit]; 

Answer 2

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");}];