标签：orm 解析 enum live sse detail 存储 tail info
转载自：http://blog.csdn.net/longitachi/article/details/50130957
首先我们访问相册，肯定有需要判断是否有访问权限的时候，然后做出相应的操作
PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus]; if (status == PHAuthorizationStatusRestricted || status == PHAuthorizationStatusDenied) { // 这里便是无访问权限 }
[[PHPhotoLibrary sharedPhotoLibrary] registerChangeObserver:self];
//相册变化回调 - (void)photoLibraryDidChange:(PHChange *)changeInstance { dispatch_sync(dispatch_get_main_queue(), ^{ // your codes }); }
#pragma mark - 获取相册内所有照片资源 - (NSArray<PHAsset *> *)getAllAssetInPhotoAblumWithAscending:(BOOL)ascending { NSMutableArray<PHAsset *> *assets = [NSMutableArray array]; PHFetchOptions *option = [[PHFetchOptions alloc] init]; //ascending 为YES时，按照照片的创建时间升序排列;为NO时，则降序排列 option.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:ascending]]; PHFetchResult *result = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:option]; [result enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { PHAsset *asset = (PHAsset *)obj; NSLog(@"照片名%@", [asset valueForKey:@"filename"]); [assets addObject:asset]; }]; return assets; }
PHImageRequestOptions *option = [[PHImageRequestOptions alloc] init]; //仅显示缩略图，不控制质量显示 /** PHImageRequestOptionsResizeModeNone, PHImageRequestOptionsResizeModeFast, //根据传入的size，迅速加载大小相匹配(略大于或略小于)的图像 PHImageRequestOptionsResizeModeExact //精确的加载与传入size相匹配的图像 */ option.resizeMode = PHImageRequestOptionsResizeModeFast; option.networkAccessAllowed = YES; //param：targetSize 即你想要的图片尺寸，若想要原尺寸则可输入PHImageManagerMaximumSize [[PHCachingImageManager defaultManager] requestImageForAsset:asset targetSize:size contentMode:PHImageContentModeAspectFit options:option resultHandler:^(UIImage * _Nullable image, NSDictionary * _Nullable info) { //解析出来的图片 }];
PHFetchResult *smartAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil]; [smartAlbums enumerateObjectsUsingBlock:^(PHAssetCollection * _Nonnull collection, NSUInteger idx, BOOL *stop) { NSLog(@"相册名字:%@", collection.localizedTitle); }];
智能相册的title不出意外都是英文，下面提供一个对应的中文名
- (NSString *)transformAblumTitle:(NSString *)title { if ([title isEqualToString:@"Slo-mo"]) { return @"慢动作"; } else if ([title isEqualToString:@"Recently Added"]) { return @"最近添加"; } else if ([title isEqualToString:@"Favorites"]) { return @"最爱"; } else if ([title isEqualToString:@"Recently Deleted"]) { return @"最近删除"; } else if ([title isEqualToString:@"Videos"]) { return @"视频"; } else if ([title isEqualToString:@"All Photos"]) { return @"所有照片"; } else if ([title isEqualToString:@"Selfies"]) { return @"自拍"; } else if ([title isEqualToString:@"Screenshots"]) { return @"屏幕快照"; } else if ([title isEqualToString:@"Camera Roll"]) { return @"相机胶卷"; } return nil; }
在项目plist配置文件中添加如下键，值设为YES，即可自动匹配手机系统语言，返回相册名字。不需要进行上列判断
Localized resources can be mixed YES //或者右键plist文件Open As->Source Code 添加 <key>CFBundleAllowMixedLocalizations</key> <true/>
PHFetchResult *userAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary options:nil];
[userAlbums enumerateObjectsUsingBlock:^(PHAssetCollection * _Nonnull collection, NSUInteger idx, BOOL * _Nonnull stop) {
NSLog(@"相册名字:%@", collection.localizedTitle);
}];
#pragma mark - 获取指定相册内的所有图片 - (NSArray<PHAsset *> *)getAssetsInAssetCollection:(PHAssetCollection *)assetCollection ascending:(BOOL)ascending { NSMutableArray<PHAsset *> *arr = [NSMutableArray array]; PHFetchResult *result = [self fetchAssetsInAssetCollection:assetCollection ascending:ascending]; [result enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { [arr addObject:obj];//这个obj即PHAsset对象 }]; return arr; }
PHImageRequestOptions *option = [[PHImageRequestOptions alloc] init];
option.networkAccessAllowed = NO;
option.synchronous = YES;
__block BOOL isInLocalAblum = YES;
[[PHCachingImageManager defaultManager] requestImageDataForAsset:asset options:option resultHandler:^(NSData * _Nullable imageData, NSString * _Nullable dataUTI, UIImageOrientation orientation, NSDictionary * _Nullable info) {
isInLocalAblum = imageData ? YES : NO;
}];
return isInLocalAblum;
9.获取LivePhoto
PHLivePhotoRequestOptions *option = [[PHLivePhotoRequestOptions alloc] init]; option.version = PHImageRequestOptionsVersionCurrent; option.deliveryMode = PHImageRequestOptionsDeliveryModeOpportunistic; option.networkAccessAllowed = YES; [[PHCachingImageManager defaultManager] requestLivePhotoForAsset:asset targetSize:PHImageManagerMaximumSize contentMode:PHImageContentModeAspectFit options:option resultHandler:^(PHLivePhoto * _Nullable livePhoto, NSDictionary * _Nullable info) { if (completion) completion(livePhoto, info); }];
10.获取Video
[[PHCachingImageManager defaultManager] requestPlayerItemForVideo:asset options:nil resultHandler:^(AVPlayerItem * _Nullable playerItem, NSDictionary * _Nullable info) { if (completion) completion(playerItem, info); }];
iOS8.0 使用Photos.framework对相册的常用操作
标签：orm 解析 enum live sse detail 存储 tail info
原文地址：http://www.cnblogs.com/niit-soft-518/p/7857315.html
