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看到项目中用到AssetsLibrary这个框架, 所以研究了一下
其实很简单
- (void)getAlbumPhoto { NSString *tipTextWhenNoPhotosAuthorization; // 提示语 // 获取当前应用对照片的访问授权状态 ALAuthorizationStatus authorizationStatus = [ALAssetsLibrary authorizationStatus]; NSLog(@"sss%ld", (long)authorizationStatus); /* // 不确定身份 ALAuthorizationStatusNotDetermined NS_ENUM_DEPRECATED_IOS(6_0, 9_0) = 0, // 受限制授权 ALAuthorizationStatusRestricted NS_ENUM_DEPRECATED_IOS(6_0, 9_0), // 拒绝 ALAuthorizationStatusDenied NS_ENUM_DEPRECATED_IOS(6_0, 9_0), // 授权成功 ALAuthorizationStatusAuthorized NS_ENUM_DEPRECATED_IOS(6_0, 9_0) */ // 如果没有获取访问授权,或者访问授权状态已经被明确禁止,则显示提示语,引导用户开启授权 if (authorizationStatus == ALAuthorizationStatusRestricted || authorizationStatus == ALAuthorizationStatusDenied) { NSDictionary *mainInfoDictionary = [[NSBundle mainBundle] infoDictionary]; NSString *appName = [mainInfoDictionary objectForKey:@"CFBundleName"]; tipTextWhenNoPhotosAuthorization = [NSString stringWithFormat:@"请在设备的\"设置-隐私-照片\"选项中,允许 %@ 访问你的手机相册", appName]; // 展示提示语 UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"" message:tipTextWhenNoPhotosAuthorization delegate:nil cancelButtonTitle:@"取消" otherButtonTitles: nil]; [alertView show]; return; } [self.assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) { if (group) { // 过滤相册列表 /* // + (ALAssetsFilter *)allPhotos; // 全部的相册 // + (ALAssetsFilter *)allVideos; // 全部的视频 // + (ALAssetsFilter *)allAssets; // 所有视频 + 相册 */ [group setAssetsFilter:[ALAssetsFilter allPhotos]]; if (group.numberOfAssets > 0) { // 把相册储存到数组中,方便后面展示相册时使用 AssetPhotoAlbum *assetGroupAlbum = [AssetPhotoAlbum assetPhotoAlbumWithAssetsGroup:group]; [self.allAssetGroupAlbum addObject:assetGroupAlbum]; [group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) { if (result) { AlbumPhoto *albumPhoto = [AlbumPhoto albumPhotoAsset:result]; [assetGroupAlbum.assetAlbumPhotosArray addObject:albumPhoto]; } }]; } } else { if (self.allAssetGroupAlbum.count) { [self.collectionView reloadData]; } } } failureBlock:^(NSError *error) { NSLog(@"Asset group not found!\n"); }]; }
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原文地址:http://www.cnblogs.com/MrTao/p/5252443.html