iOS相册、拍照、iCloud使用

使用系统相册、拍照、iCloud功能

1、添加权限：

相机权限 Privacy - Camera Usage Description App想要访问您手机的系统相机，是否允许？
相册权限 Privacy - Photo Library Additions Usage Description App想要访问您手机的相册，是否允许？

2、系统库头文件

#import <Photos/Photos.h>

3、点击按钮，弹出选择弹窗

- (void)inavBtnClicked:(UIButton*)btn
{__weak typeof(self)weakSelf = self;UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"上传" message:@"" preferredStyle:UIAlertControllerStyleActionSheet];UIAlertAction *action = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {__strong typeof(self)strongSelf = self;[strongSelf openPhotosAlbum];}];UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {__strong typeof(self)strongSelf = self;[strongSelf openCamera];}];UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"iCloud" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {__strong typeof(self)strongSelf = self;[strongSelf openICloud];}];[alert addAction:action];[alert addAction:action1];[alert addAction:action2];[weakSelf presentViewController:alert animated:YES completion:^{}];
}

如图：

4、实现相关方法

- (void)openPhotosAlbum {UIImagePickerController *picker = [[UIImagePickerController alloc] init];//如果需要编辑图片，建议sourceType选择UIImagePickerControllerSourceTypeSavedPhotosAlbum，如果不需要，可选择UIImagePickerControllerSourceTypePhotoLibrary。picker.allowsEditing = YES;picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;picker.delegate = self;[self presentViewController:picker animated:YES completion:nil];
}
- (void)openCamera {UIImagePickerController *picker = [[UIImagePickerController alloc] init];picker.allowsEditing = YES;picker.sourceType = UIImagePickerControllerSourceTypeCamera;picker.delegate = self;[self presentViewController:picker animated:YES completion:nil];
}
- (void)openICloud {if (![ViewController ICloudEnable]) {NSLog(@"iCloud没有开启");return;}NSArray *documentTypes = @[@"public.content",@"public.text",@"public.source-code",@"public.image",@"public.jpeg",@"public.png",@"com.adobe.pdf",@"com.apple.keynote.key",@"com.microsoft.word.doc",@"com.microsoft.excel.xls",@"com.microsoft.powerpoint.ppt"];UIDocumentPickerViewController *picker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:documentTypes inMode:UIDocumentPickerModeOpen];picker.delegate = self;[self presentViewController:picker animated:YES completion:nil];
}
//判断iCloud是否可用
+ (BOOL)ICloudEnable {NSURL *url = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil];return url != nil;
}

5、代理

#pragma mark - UIImagePickerControllerDelegate
//selected
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{//此处需要先dismiss掉picker，然后再present出alert，佛否则alert显示会出bug[picker dismissViewControllerAnimated:YES completion:nil];//获取经过编辑后的图片UIImage *image = info[UIImagePickerControllerEditedImage];if (!image) {//如果未编辑，取原图image = info[UIImagePickerControllerOriginalImage];}if (picker.sourceType == UIImagePickerControllerSourceTypeSavedPhotosAlbum){NSURL *url = nil;if (@available(iOS 11.0, *)) {url = info[UIImagePickerControllerImageURL];} else {url = info[UIImagePickerControllerReferenceURL];}}else if (picker.sourceType == UIImagePickerControllerSourceTypeCamera){__block NSString *locolId = nil;[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{//保存到相册PHAssetChangeRequest *request = [PHAssetChangeRequest creationRequestForAssetFromImage:image];locolId = request.placeholderForCreatedAsset.localIdentifier;} completionHandler:^(BOOL success, NSError * _Nullable error) {if (error == nil) {//获取图片信息PHFetchResult *result = [PHAsset fetchAssetsWithLocalIdentifiers:@[locolId] options:nil];PHAsset *asset = [result firstObject];[[PHImageManager defaultManager] requestImageDataForAsset:asset options:nil resultHandler:^(NSData *imageData, NSString *dataUTI, UIImageOrientation orientation, NSDictionary *info) {//NSURL *url = info[@"PHImageFileURLKey"];}];}else {NSLog(@"图片保存失败!");}}];}
}
//cancel
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {[picker dismissViewControllerAnimated:YES completion:nil];
}#pragma mark - UIDocumentPickerDelegate
- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentsAtURLs:(NSArray <NSURL *>*)urls
{}
- (void)documentPickerWasCancelled:(UIDocumentPickerViewController *)controller
{[controller dismissViewControllerAnimated:YES completion:nil];
}
- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentAtURL:(NSURL *)url
{}

PHPhotoLibrary提供了拍照保存到相册等功能。

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