iOS 開發: 自定義相冊, 保存多張圖片到自定義相冊中

時間 2019-12-19

標籤 ios 開發自定義相冊保存圖片到自定義欄目 iOS 简体版

原文原文鏈接

一、自定義相冊(兼容 iOS7 iOS8)html

- (void)viewDidLoad {
//search all photo albums in the library
    [assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAlbum usingBlock:^(ALAssetsGroup *group, BOOL *stop)
     {
         //compare the names of the albums
         if ([@"九噠" 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:@"九噠"];
                 } completionHandler:^(BOOL success, NSError *error) {
                     if (!success) {
                         NSLog(@"Error creating album: %@", error);
                     }
                 }];
             }
             else {
                 // iOS 7.x code
                 //create new assets album
                 [assetsLibrary addAssetsGroupAlbumWithName:@"九噠" resultBlock:nil failureBlock: nil];
             }
             //should be the last iteration anyway, but just in case
             _isHaveAlbum = YES;
             return;
         }
     } failureBlock: nil];
}

具體的解釋我已經在上一篇博文(http://www.cnblogs.com/cai-rd/p/4432908.html)中解釋, 這裏就很少解釋了, 上面代碼須要補充一個變量 isHaveAblum = NO;spa

二、把多張照片存入自定義的相冊中code

for(int i = 0; i < 9; i++){
// 利用延時每隔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");
                        }];
});

}

/**
 *  保存圖片到相冊中
 *
 *  @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:@"九噠"];
                } 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];
}

三、須要引入的頭文件orm

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