iOS 开发: 自定义相册, 保存多张图片到自定义相册中

- (void)viewDidLoad {
//search all photo albums in the library
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAlbum usingBlock:^(ALAssetsGroup *group, BOOL *stop)
{
//compare the names of the albums
if ([@"九哒" compare: [group valueForProperty:ALAssetsGroupPropertyName]]==NSOrderedSame) {
//target album is found
_isHaveAlbum = YES;
return;
}
if (group==nil && _isHaveAlbum == NO) {
//photo albums are over, target album does not exist, thus create it
//__weak ALAssetsLibrary* weakSelf = assetsLibrary;

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) {
// iOS 8 code
// Create new album.
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
[PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:@"九哒"];
} completionHandler:^(BOOL success, NSError *error) {
if (!success) {
NSLog(@"Error creating album: %@", error);
}
}];
}
else {
// iOS 7.x code
//create new assets album
[assetsLibrary addAssetsGroupAlbumWithName:@"九哒" resultBlock:nil failureBlock: nil];
}
//should be the last iteration anyway, but just in case
_isHaveAlbum = YES;
return;
}
} failureBlock: nil];
}

具体的解释我已经在上一篇博文(http://www.cnblogs.com/cai-rd/p/4432908.html)中解释, 这里就不多解释了, 上面代码需要补充一个变量 isHaveAblum = NO;

for(int i = 0; i < 9; i++){
// 利用延时每隔0.1秒存入 一次
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1*i * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self saveImage:yourImage toAlbum:@"Rd" withCompletionBlock:^{
NSLog(@"save s img success");
}];
});

}

/**
*  保存图片到相册中
*
*  @param image           <#image description#>
*  @param albumName       <#albumName description#>
*  @param completionBlock <#completionBlock description#>
*/
-(void)saveImage:(UIImage*)image toAlbum:(NSString*)albumName withCompletionBlock:(void (^)(void))completionBlock
{
ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc] init];
//write the image data to the assets library (camera roll)
[assetsLibrary writeImageToSavedPhotosAlbum:image.CGImage orientation:(ALAssetOrientation)image.imageOrientation completionBlock:^(NSURL* assetURL, NSError* error)
{
//error handling
if (error!=nil) {
//completionBlock(error);
return;
}
//add the asset to the custom photo album
[self addAssetURL: assetURL toAlbum:albumName withCompletionBlock:completionBlock];
}];
}

-(void)addAssetURL:(NSURL*)assetURL toAlbum:(NSString*)albumName withCompletionBlock:(void (^)(void))completionBlock
{

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

__block BOOL albumWasFound = NO;

//search all photo albums in the library
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAlbum usingBlock:^(ALAssetsGroup *group, BOOL *stop)
{
//compare the names of the albums
if ([albumName compare: [group valueForProperty:ALAssetsGroupPropertyName]]==NSOrderedSame) {
//target album is found
albumWasFound = YES;

//get a hold of the photo's asset instance
[assetsLibrary assetForURL: assetURL resultBlock:^(ALAsset *asset)
{
//add photo to the target album
[group addAsset: asset];

//run the completion block
completionBlock();
} failureBlock: nil];

//album was found, bail out of the method
return;
}

if (group==nil && albumWasFound==NO) {
//photo albums are over, target album does not exist, thus create it
__weak ALAssetsLibrary* weakSelf = assetsLibrary;

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) {
// iOS 8 code
// Create new album.
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
[PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:@"九哒"];
} completionHandler:^(BOOL success, NSError *error) {
if (!success) {
NSLog(@"Error creating album: %@", error);
}
}];
}
else {
// iOS 7.x code
//create new assets album
[assetsLibrary addAssetsGroupAlbumWithName:albumName resultBlock:^(ALAssetsGroup *group)
{
//get the photo's instance
[weakSelf assetForURL: assetURL resultBlock:^(ALAsset *asset)
{
//add photo to the newly created album
[group addAsset: asset];

//call the completion block
completionBlock();
} failureBlock: nil];
} failureBlock: nil];
albumWasFound = YES;
}

//should be the last iteration anyway, but just in case
return;
}
} failureBlock: nil];
}

#import <AssetsLibrary/ALAsset.h>
#import <AssetsLibrary/ALAssetsLibrary.h>
#import <AssetsLibrary/ALAssetsGroup.h>
#import <AssetsLibrary/ALAssetRepresentation.h>
#import <Photos/Photos.h>