iOS9图片保存到相册

最新推荐文章于 2022-05-06 17:00:16 发布

joneOS

最新推荐文章于 2022-05-06 17:00:16 发布

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分类专栏： iOS

本文链接：https://blog.youkuaiyun.com/joneOS/article/details/48947401

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本文介绍如何在iOS应用中将图片保存到用户的设备相册，并详细解释了针对不同iOS版本（iOS 8与iOS 9及以上）所采用的不同方法。

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 [PHPhotoLibrary
requestAuthorization:^(
PHAuthorizationStatus status ) {

// To preserve the metadata, we create an asset from the JPEG NSData representation.

                        // Note that creating an asset from a UIImage discards the metadata.
                        // In iOS 9, we can use -[PHAssetCreationRequest addResourceWithType:data:options].
                        // In iOS 8, we save the image to a temporary file and use +[PHAssetChangeRequest creationRequestForAssetFromImageAtFileURL:].
                        if ( [PHAssetCreationRequest class] ) {
                            [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
                                [[PHAssetCreationRequest creationRequestForAsset] addResourceWithType:PHAssetResourceTypePhoto data:imageData options:nil];
                            } completionHandler:^( BOOL success, NSError *error ) {
                                if ( ! success ) {
                                    NSLog( @"Error occurred while saving image to photo library: %@", error );
                                }
                            }];
                        }
                        else { // iOS8
                            NSString *temporaryFileName = [NSProcessInfo processInfo].globallyUniqueString;
                            NSString *temporaryFilePath = [NSTemporaryDirectory() stringByAppendingPathComponent:[temporaryFileName stringByAppendingPathExtension:@"jpg"]];
                            NSURL *temporaryFileURL = [NSURL fileURLWithPath:temporaryFilePath];

                            [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
                                NSError *error = nil;
                                [imageData writeToURL:temporaryFileURL options:NSDataWritingAtomic error:&error];
                                if ( error ) {
                                    NSLog( @"Error occured while writing image data to a temporary file: %@", error );
                                }
                                else {
                                    [PHAssetChangeRequest creationRequestForAssetFromImageAtFileURL:temporaryFileURL];
                                }
                            } completionHandler:^( BOOL success, NSError *error ) {
                                if ( ! success ) {
                                    NSLog( @"Error occurred while saving image to photo library: %@", error );
                                }

                                // Delete the temporary file.
                                [[NSFileManager defaultManager] removeItemAtURL:temporaryFileURL error:nil];
                            }];

}