ios之获取图库图片

需导入AssetsLibrary和OpenAL.framework

-(IBAction)getAllPictures:(id)sender

{

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

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

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

[library enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) {//获取所有group

if(group)

{

count = group.numberOfAssets;

}

[group enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) {//从group里面

NSString* assetType = [result valueForProperty:ALAssetPropertyType];

if ([assetType isEqualToString:ALAssetTypePhoto]) //获取类型是photo的

{

NSURL *url= (NSURL*) [[result defaultRepresentation]url];

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

[arr addObject:[UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]]];

if(arr.count == count)

{

imageArray=[[NSArray alloc] initWithArray:arr];

[self allPhotosCollected:imageArray];

}

} failureBlock:^(NSError *error){

NSLog(@"operation was not successfull!");

}];

}

}];

} failureBlock:^(NSError *error) {

NSLog(@"Enumerate the asset groups failed.");

}];

}

-(void)allPhotosCollected:(NSArray*)imgArray

{

NSLog(@"all pictures are %@",imgArray);

}