ios - 确定是否设置了对照片库的访问 - PHPhotoLibrary

Question

随着 iOS 8 中的新功能，如果您在应用程序中使用相机，它会请求访问相机的权限，然后当您尝试重新拍摄照片时，它会请求访问照片库的权限。下次我启动应用程序时，我想检查相机和照片库是否有访问权限。

对于相机，我通过检查

if ([AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo] == AVAuthorizationStatusDenied)
{
// do something
}

我正在为照片库寻找类似的东西。

Answer 1

我知道这已经得到回答，但只是为了扩展@Tim 的回答，这里是您需要的代码(iOS 8 及更高版本):

PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];

if (status == PHAuthorizationStatusAuthorized) {
     // Access has been granted.
}

else if (status == PHAuthorizationStatusDenied) {
     // Access has been denied.
}

else if (status == PHAuthorizationStatusNotDetermined) {

     // Access has not been determined.
     [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {

         if (status == PHAuthorizationStatusAuthorized) {
             // Access has been granted.         
         }

         else {
             // Access has been denied.
         }
     }];  
}

else if (status == PHAuthorizationStatusRestricted) {
     // Restricted access - normally won't happen.
}

别忘了 #import <Photos/Photos.h>

如果您使用的是 Swift 3.0 或更高版本，则可以使用以下代码:

// Get the current authorization state.
let status = PHPhotoLibrary.authorizationStatus()

if (status == PHAuthorizationStatus.authorized) {
    // Access has been granted.
}

else if (status == PHAuthorizationStatus.denied) {
    // Access has been denied.
}

else if (status == PHAuthorizationStatus.notDetermined) {

    // Access has not been determined.
    PHPhotoLibrary.requestAuthorization({ (newStatus) in

        if (newStatus == PHAuthorizationStatus.authorized) {

        }

        else {

        }
    })
}

else if (status == PHAuthorizationStatus.restricted) {
    // Restricted access - normally won't happen.
}

别忘了 import Photos