iOS 14 相冊適配PHAuthorizationStatusNotDetermined

1.

#import <PhotosUI/PhotosUI.h>

 

Info.plist 中設置
“PHPhotoLibraryPreventAutomaticLimitedAccessAlert”的值為 YES 來阻止該彈窗反復彈出

 2.iOS14之后獲取相冊授權狀態的方法

    if (@available(iOS 14, *)) {
        [PHPhotoLibrary requestAuthorizationForAccessLevel:PHAccessLevelReadWrite handler:^(PHAuthorizationStatus status) {
            dispatch_async(dispatch_get_main_queue(), ^{
                ///用戶已授權此應用程序有限的照片庫訪問權限
                if (status == PHAuthorizationStatusLimited) {
                   
                }else{
                    
                }
            });
        }];
    }

　　

 

3.第一種使用方法，和QQ一樣，推薦使用

不在 Info.plist 阻止彈窗彈出， 使用監聽獲取回調

1. 實現PHPhotoLibraryChangeObserver

@interface AddWatermarkViewController ()<PHPhotoLibraryChangeObserver>

2. 注冊監聽
- (void)viewDidLoad {
    [super viewDidLoad];
    [[PHPhotoLibrary sharedPhotoLibrary] registerChangeObserver:self];
}

/// PHPhotoLibrary監聽: 選擇圖片之后的回調

#pragma mark-   PHPhotoLibraryChangeObserver

- (void)photoLibraryDidChange:(PHChange *)changeInstance{

    ///一定要在主線程刷新：這里是異步監聽

    dispatch_async (dispatch_get_main_queue (), ^{

        [self reloadSelectedAssetCollection:nil];

    });

}

4. 注銷監聽
- (void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    [[PHPhotoLibrary sharedPhotoLibrary] unregisterChangeObserver:self];
}

　　

 

 

2.自定義控制器，此方法選了之后去 設置中查看， 還是沒效果。。 原因待查

1. 設置代理 PHPickerViewControllerDelegate
@interface AddWatermarkViewController ()< PHPickerViewControllerDelegate>


2.手動顯示彈窗
- (void)showAlert{
    @WeakObj(self);
    if (@available(iOS 14, *)) {
　　　　///14之后想着授權狀態方法：異步的
        [PHPhotoLibrary requestAuthorizationForAccessLevel:PHAccessLevelReadWrite handler:^(PHAuthorizationStatus status) {
            dispatch_async(dispatch_get_main_queue(), ^{
                @StrongObj(self);
                if (status == PHAuthorizationStatusLimited) {
                    PHPickerConfiguration *configuration = [[PHPickerConfiguration alloc] init];
                    configuration.filter = [PHPickerFilter imagesFilter]; // 可配置查詢用戶相冊中文件的類型，支持三種 imagesFilter 表示 只顯示圖片
                    configuration.selectionLimit = 0; // 默認為1，為0時表示可多選。
                    
                    PHPickerViewController *picker = [[PHPickerViewController alloc] initWithConfiguration:configuration];
                    picker.delegate = self;
                    [self presentViewController:picker animated:YES completion:nil];
                }
            });
        }];
    }
}

//點擊取消或者完成的回調
- (void)picker:(PHPickerViewController *)picker didFinishPicking:(NSArray<PHPickerResult *> *)results
API_AVAILABLE(ios(14)){
    [picker dismissViewControllerAnimated:YES completion:nil];
    if (!results || !results.count) {
        return;
    }
    [self reloadSelectedAssetCollection:self.selectedAssetCollection];
    NSLog(@"didFinishPicking");
}

　　

參考：

iOS14 適配 先行者

https://www.jianshu.com/p/a0b0303962bb

 

iOS14 隱私適配及部分解決方案

https://www.jianshu.com/p/1803bd950b90?devtype=android