zoukankan      html  css  js  c++  java

  • iOS中相册-用一个tableView区分照片和video

     

    [objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    1. <span style="font-size:18px;">  
    2. #import "ViewController.h"  
    3.   
    4. @interface ViewController ()  
    5.   
    6. @property(nonatomic,strong)UITableView *tableView;  
    7. @property(nonatomic,strong)NSMutableArray *assets;// 照片数组  
    8. @property(nonatomic,strong)NSMutableArray *videoArr;// 视频数组  
    9. @property(nonatomic,strong)ALAssetsLibrary *library;  
    10.   
    11. @end  
    12.   
    13. @implementation ViewController  
    14.   
    15. - (void)viewDidLoad  
    16. {  
    17.     [super viewDidLoad];  
    18.     self.view.backgroundColor = [UIColor blackColor];  
    19.       
    20.     NSLog(@"%ld", [ALAssetsLibrary authorizationStatus]);  
    21.       
    22.     self.assets = [[NSMutableArray alloc]initWithCapacity:0];  
    23.     self.videoArr = [[NSMutableArray alloc]initWithCapacity:0];  
    24.       
    25.     self.tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 50, 320, 416) style:UITableViewStyleGrouped];  
    26.     self.tableView.delegate = self;  
    27.     self.tableView.dataSource = self;  
    28.     [self.view addSubview:self.tableView];  
    29.       
    30.     UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, self.tableView.frame.size.height+70, 320, 80)];  
    31.     view.backgroundColor = [UIColor yellowColor];  
    32.     UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];  
    33.     btn1.frame = CGRectMake(10, 10, 100, 50);  
    34.     [btn1 setTitle:@"测试添加相册" forState:UIControlStateNormal];  
    35.     [btn1 addTarget:self action:@selector(addGroud) forControlEvents:UIControlEventTouchUpInside];  
    36.     [view addSubview:btn1];  
    37.     [self.view addSubview:view];  
    38.       
    39.     self.library = [[ALAssetsLibrary alloc] init];  
    40.       
    41.     void (^assetEnumerator)(ALAsset *, NSUInteger, BOOLBOOL *) = ^(ALAsset *result, NSUInteger index, BOOLBOOL *stop) {  
    42.         if(result != NULL) {  
    43.               
    44.             if ([result valueForProperty:ALAssetPropertyType] == ALAssetTypeVideo) {  
    45.                 [self.videoArr addObject:result];  
    46.             }else if([result valueForProperty:ALAssetPropertyType] == ALAssetTypePhoto){  
    47.                 [self.assets addObject:result];  
    48.             }  
    49.               
    50.         }  
    51.     };  
    52.       
    53.     //便利相册  
    54.     void (^assetGroupEnumerator)(ALAssetsGroup *, BOOLBOOL *) =  ^(ALAssetsGroup *group, BOOLBOOL *stop) {  
    55.   
    56.         if(group != nil) {  
    57.             [group enumerateAssetsUsingBlock:assetEnumerator];  
    58.         }  
    59.           
    60.         [self.tableView reloadData];  
    61.     };  
    62.       
    63. //    //便利所有相册  
    64.     [self.library enumerateGroupsWithTypes:ALAssetsGroupAll  
    65.                            usingBlock:assetGroupEnumerator  
    66.                          failureBlock: ^(NSError *error) {  
    67.                              NSLog(@"便利所有相册");  
    68.                                
    69.                          }];  
    70.       
    71.       
    72.     [self.tableView reloadData];  
    73.       
    74.    
    75. }  
    76.   
    77. - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{  
    78.     return 2;  
    79. }  
    80.   
    81. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {  
    82.       
    83.     if (section == 0) {  
    84.           
    85.         if ([self.assets count]>5) {  
    86.             return 5;  
    87.         }else{  
    88.             return [self.assets count];  
    89.         }  
    90.           
    91.     }else{  
    92.           
    93.         if ([self.videoArr count]>5) {  
    94.             return 5;  
    95.         }else{  
    96.             return [self.videoArr count];  
    97.         }  
    98.           
    99.     }  
    100.       
    101. }  
    102.   
    103. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {  
    104.     static NSString *CellIdentifier = @"Cell";  
    105.       
    106.     UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];  
    107.     if (cell == nil) {  
    108.         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];  
    109.     }  
    110.       
    111.       
    112.     if (indexPath.section == 0) {  
    113.         ALAsset *asset = [self.assets objectAtIndex:indexPath.row];  
    114.           
    115.         struct CGImage *imagecg = asset.thumbnail;  
    116.         UIImage *image = [UIImage imageWithCGImage:imagecg];  
    117.           
    118.         [cell.imageView setImage:image];  
    119.         [cell.textLabel setText:[NSString stringWithFormat:@"Photo %d", indexPath.row+1]];  
    120.     }else if (indexPath.section == 1){  
    121.           
    122.         ALAsset *asset = [self.videoArr objectAtIndex:indexPath.row];  
    123.           
    124.         struct CGImage *imagecg = asset.thumbnail;  
    125.         UIImage *image = [UIImage imageWithCGImage:imagecg];  
    126.           
    127.         [cell.imageView setImage:image];  
    128.         [cell.textLabel setText:[NSString stringWithFormat:@"video %d", indexPath.row+1]];  
    129.   
    130.     }  
    131.   
    132.     return cell;  
    133. }  
    134. </span>  




    添加一个图片到默认相册

    [objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    1. <span style="font-size:18px;">  
    2. //添加图片到相册  
    3.     NSString *path = [[NSBundle mainBundle] pathForResource:@"123" ofType:@"png"];  
    4.     NSURL *urll = [NSURL fileURLWithPath:path];  
    5.     NSData *data = [NSData dataWithContentsOfURL:urll];  
    6.     [_library writeImageDataToSavedPhotosAlbum:data metadata:nil completionBlock:^(NSURL *assetURL, NSError *error) {  
    7.           
    8.     }];  
    9.       
    10.     //保存图片到系统默认的相册中，使用nsdata的形式，并返回照片的url地址  
    11.     [_library writeImageDataToSavedPhotosAlbum:nil metadata:nil completionBlock:^(NSURL *assetURL, NSError *error) {  
    12.       
    13.     }];</span>  




    创建一个相册

    [objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    1. <span style="font-size:18px;">- (void)addGroud{  
    2.     [self.library addAssetsGroupAlbumWithName:@"测试添加相册" resultBlock:^(ALAssetsGroup *group) {  
    3.         NSLog(@"addAssetsGroupAlbumWithName");  
    4.         //        //查看相册的名字  
    5.         NSLog(@"ALAssetsGroupPropertyName:%@",[group valueForProperty:ALAssetsGroupPropertyName]);  
    6.         //        //查看相册的类型  
    7.         NSLog(@"ALAssetsGroupPropertyType:%@",[group valueForProperty:ALAssetsGroupPropertyType]);  
    8.         //        //查看相册的存储id  
    9.         NSLog(@"ALAssetsGroupPropertyPersistentID:%@",[group valueForProperty:ALAssetsGroupPropertyPersistentID]);  
    10.         //        //查看相册存储的位置地址  
    11.         NSLog(@"ALAssetsGroupPropertyURL:%@",[group valueForProperty:ALAssetsGroupPropertyURL]);  
    12.         NSURL *groupURL = [group valueForProperty:ALAssetsGroupPropertyURL];  
    13.           
    14.     } failureBlock:^(NSError *error) {  
    15.         NSLog(@"ERR : %@",error);  
    16.     }];  
    17.   
    18. }  
    19. </span>  



    保存video到相册

    [objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    1. <span style="font-size:18px;">  
    2.   
    3. //保存video到相册  
    4. - (void)saveVideo:(NSString *)videoPath toAlbum:(NSString *)albumName withCompletionBlock:(SaveImageCompletion)completionBlock  
    5. {  
    6.     [self writeVideoAtPathToSavedPhotosAlbum:[NSURL fileURLWithPath:videoPath]  
    7.                              completionBlock:^(NSURL *assetURL, NSError *error) {  
    8.                                  if (error!=nil) {  
    9.                                      completionBlock(error);  
    10.                                      return;  
    11.                                  }  
    12.                                    
    13.                                  //add the asset to the custom photo album  
    14.                                  [self addAssetURL: assetURL  
    15.                                            toAlbum:albumName  
    16.                                withCompletionBlock:completionBlock];  
    17.                              }];  
    18. }  
    19.   
    20.   
    21. -(void)addAssetURL:(NSURL*)assetURL toAlbum:(NSString*)albumName withCompletionBlock:(SaveImageCompletion)completionBlock  
    22. {  
    23.     __block BOOL albumWasFound = NO;  
    24.       
    25.     //search all photo albums in the library  
    26.     //遍历相册  
    27.     [self enumerateGroupsWithTypes:ALAssetsGroupAlbum   
    28.                         usingBlock:^(ALAssetsGroup *group, BOOLBOOL *stop) {  
    29.   
    30.                             //compare the names of the albums  
    31.                             if ([albumName compare: [group valueForProperty:ALAssetsGroupPropertyName]]==NSOrderedSame) {  
    32.                                   
    33.                                 //target album is found  
    34.                                 albumWasFound = YES;  
    35.                                   
    36.                                 //get a hold of the photo's asset instance  
    37.                                 //通过url得到asset  
    38.                                 [self assetForURL: assetURL   
    39.                                       resultBlock:^(ALAsset *asset) {  
    40.                                                     
    41.                                           //add photo to the target album  
    42.                                           [group addAsset: asset];  
    43.                                             
    44.                                           //run the completion block  
    45.                                           completionBlock(nil);  
    46.                                             
    47.                                       } failureBlock: completionBlock];  
    48.   
    49.                                 //album was found, bail out of the method  
    50.                                 return;  
    51.                             }  
    52.                               
    53.                             //如果没有 创建相册加入asset  
    54.                             if (group==nil && albumWasFound==NO) {  
    55.                                 //photo albums are over, target album does not exist, thus create it  
    56.                                   
    57.                                 ALAssetsLibrary* weakSelf = self;  
    58.   
    59.                                 //create new assets album  
    60.                                 [self addAssetsGroupAlbumWithName:albumName   
    61.                                                       resultBlock:^(ALAssetsGroup *group) {  
    62.                                                                     
    63.                                                           //get the photo's instance  
    64.                                                           [weakSelf assetForURL: assetURL   
    65.                                                                         resultBlock:^(ALAsset *asset) {  
    66.   
    67.                                                                             //add photo to the newly created album  
    68.                                                                             [group addAsset: asset];  
    69.                                                                               
    70.                                                                             //call the completion block  
    71.                                                                             completionBlock(nil);  
    72.   
    73.                                                                         } failureBlock: completionBlock];  
    74.                                                             
    75.                                                       } failureBlock: completionBlock];  
    76.   
    77.                                 //should be the last iteration anyway, but just in case  
    78.                                 return;  
    79.                             }  
    80.                               
    81.                         } failureBlock: completionBlock];  
    82.       
    83. }  
    84. </span>  




    保存png到指定相册

    [objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    1. <span style="font-size:18px;">  
    2. //保存图片到系统默认的相册中，使用cgimageref的形式，并且选择图片以什么旋转方向的形式保存，并返回照片的url地址  
    3.     /* 
    4.      typedef enum { 
    5.      ALAssetOrientationUp,            // default orientation 
    6.      ALAssetOrientationDown,          // 180 deg rotation 
    7.      ALAssetOrientationLeft,          // 90 deg CCW 
    8.      ALAssetOrientationRight,         // 90 deg CW 
    9.      ALAssetOrientationUpMirrored,    // as above but image mirrored along other axis. horizontal flip 
    10.      ALAssetOrientationDownMirrored,  // horizontal flip 
    11.      ALAssetOrientationLeftMirrored,  // vertical flip 
    12.      ALAssetOrientationRightMirrored, // vertical flip 
    13.      } ALAssetOrientation; 
    14.      */  
    15.     UIImage* image = [UIImage imageNamed:@"123"];  
    16.     [_library writeImageToSavedPhotosAlbum:[image CGImage] orientation:ALAssetOrientationLeft completionBlock:^(NSURL *assetURL, NSError *error) {  
    17.         NSLog(@"save image:%@",assetURL);  
    18.         //通过ALAssetsLibrary迭代取出所有相册  
    19.         [_library enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOLBOOL *stop) {  
    20.             NSString* groupname = [group valueForProperty:ALAssetsGroupPropertyName];  
    21.             //如果相册的名称是test的时候，对其进行操作  
    22.             if ([groupname isEqualToString:@"测试添加相册"]) {  
    23.                 //设置相册组的筛选条件，ALAssetsFilter类表示筛选条件，allPhotos代表相册只包含相片，allVideos代表只包含视频，allAssets代表包含所有资源  
    24.                 [group setAssetsFilter:[ALAssetsFilter allPhotos]];  
    25.                 //通过刚保存的照片的url，把保存到默认相册的照片也保存到test相册中  
    26.                 [_library assetForURL:assetURL resultBlock:^(ALAsset *asset) {  
    27.                     //添加资源到指定的相册  
    28.                     [group addAsset:asset];  
    29.                     //获取相册中一共的资源数量  
    30.                     int count = [group numberOfAssets];  
    31.                     NSLog(@"count:%d",count);  
    32.                     dispatch_queue_t main = dispatch_get_main_queue();  
    33.                     dispatch_async(main, ^{  
    34.                         //获取相册的封面图片  
    35.                         CGImageRef poster = [group posterImage];  
    36.                           
    37.                     });  
    38.                     //NSString *const ALAssetsGroupPropertyName;  
    39.                     //NSString *const ALAssetsGroupPropertyType;  
    40.                     //NSString *const ALAssetsGroupPropertyPersistentID;  
    41.                     //NSString *const ALAssetsGroupPropertyURL;  
    42.                     //查看相册的名字  
    43.                     NSLog(@"ALAssetsGroupPropertyName:%@",[group valueForProperty:ALAssetsGroupPropertyName]);  
    44.                     //查看相册的类型  
    45.                     NSLog(@"ALAssetsGroupPropertyType:%@",[group valueForProperty:ALAssetsGroupPropertyType]);  
    46.                     //查看相册的存储id  
    47.                     NSLog(@"ALAssetsGroupPropertyPersistentID:%@",[group valueForProperty:ALAssetsGroupPropertyPersistentID]);  
    48.                     //查看相册存储的位置地址  
    49.                     NSLog(@"ALAssetsGroupPropertyURL:%@",[group valueForProperty:ALAssetsGroupPropertyURL]);  
    50.                     //按遍历顺序获取指定索引的资源，遍历顺序可以是先序或倒序  
    51.                     /* 
    52.                      enum { 
    53.                      NSEnumerationConcurrent = (1UL << 0), 
    54.                      NSEnumerationReverse = (1UL << 1), 
    55.                      }; 
    56.                      typedef NSUInteger NSEnumerationOptions; 
    57.                      */  
    58.                     [group enumerateAssetsAtIndexes:[NSIndexSet indexSetWithIndex:0] options:NSEnumerationConcurrent usingBlock:^(ALAsset *result, NSUInteger index, BOOLBOOL *stop) {  
    59.                           
    60.                     }];  
    61.                     //按顺便遍历获取相册中所有的资源，index代表资源的索引，stop赋值为false时，会停止遍历  
    62.                     [group enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOLBOOL *stop) {  
    63.                           
    64.                     }];  
    65.                     //按顺便遍历获取相册中所有的资源，遍历顺序可以是先序或倒序，index代表资源的索引，stop赋值为false时，会停止遍历  
    66.                     [group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *result, NSUInteger index, BOOLBOOL *stop) {  
    67.                           
    68.                     }];  
    69.                       
    70.                 } failureBlock:^(NSError *error) {  
    71.                       
    72.                 }];  
    73.             }  
    74.         } failureBlock:^(NSError *error) {  
    75.               
    76.         }];  
    77.     }];  
    78. </span>  


    参考文章:http://blog.csdn.net/kingsley_cxz/article/category/1466803

  • 相关阅读:
    centos下搭建多项目svn服务器
    LAMP环境的搭建（三）----PHP7的安装
    LAMP环境的搭建（四）----Apache下部署项目
    LAMP环境的搭建（二）----Mysql安装与配置
    LAMP环境的搭建（一）----Apache安装
    shared memory segment exceeded your kernel's SHMMAX parameter
    无锁队列的实现
    CAS中的ABA问题
    MESI－CPU缓存一致性协议
    CAS lock-free
  • 原文地址：https://www.cnblogs.com/allanliu/p/4207841.html
Copyright © 2011-2022 走看看