Core Device Info Query Storage

Query Storage Information

Request the latest storage information from a connected device, then read the updated storageInfo property.

Prerequisites

Before querying storage information, ensure:

• The device is connected and in a stable state
• The device supports the DeviceInfoAPI protocol

API Reference

Framework

AIBuds.xcframework

Import

In the files where you want to use the SDK, import the main framework:

Swift

import AIBuds

Objective-C

#import <AIBuds/AIBuds.h>
#import <AIBuds/AIBuds-Swift.h>

Protocol

The request method and result property are defined in DeviceInfoAPI.

Swift

protocol DeviceInfoAPI: DeviceAPI {
    /// Device storage information.
    var storageInfo: StorageInfoModel? { get }

    /// Request to query the device storage information.
    /// - Parameters:
    ///   - completion: A closure that is called when the operation completes.
    ///   - success: `true` if the operation was successful; otherwise `false`.
    ///   - error: An `NSError` object that describes the error that occurred, or `nil` if the operation was successful.
    func requestQueryStorageInfo(
        _ completion: AIBudsCompletionHandler?
    )
}

Objective-C

@protocol AIBudsDeviceInfoAPI <AIBudsDeviceAPI>
    /// Device storage information.
    @property (nonatomic, readonly, strong) AIBudsStorageInfoModel * _Nullable storageInfo;

    /// Request to query the device storage information.
    /// - Parameters:
    ///   - completion: A closure that is called when the operation completes.
    ///   - success: `true` if the operation was successful; otherwise `false`.
    ///   - error: An `NSError` object that describes the error that occurred, or `nil` if the operation was successful.
    - (void)requestQueryStorageInfoWithCompletion:(AIBudsCompletionHandler _Nullable)completion;
@end

Instance Method

Requests the latest device storage information.

Swift

/// Request to query the device storage information.
/// - Parameters:
///   - completion: A closure that is called when the operation completes.
///   - success: `true` if the operation was successful; otherwise `false`.
///   - error: An `NSError` object that describes the error that occurred, or `nil` if the operation was successful.
func requestQueryStorageInfo(
    _ completion: AIBudsCompletionHandler?
)

Objective-C

/// Request to query the device storage information.
/// - Parameters:
///   - completion: A closure that is called when the operation completes.
///   - success: `true` if the operation was successful; otherwise `false`.
///   - error: An `NSError` object that describes the error that occurred, or `nil` if the operation was successful.
- (void)requestQueryStorageInfoWithCompletion:(AIBudsCompletionHandler _Nullable)completion;

Parameters

Parameter	Type	Description
completion	AIBudsCompletionHandler?	Optional completion handler called when the request finishes.

Callback Parameters:

Name	Type	Description
success	Bool / BOOL	true if the request succeeded; otherwise false.
error	NSError?	Error details if the request failed; otherwise nil.

Result Properties:

Property	Type	Description
usedSpaceInMB	NSNumber	Used storage space in megabytes.
freeSpaceInMB	NSNumber	Remaining available storage space in megabytes.

Return Value

The method does not return storage data in its completion handler. After a successful request, read the updated storageInfo property.

Usage Examples

Swift

import AIBuds

final class DeviceManager {
    weak var device: DeviceConvertible?

    func queryStorageInformation() {
        guard let device = device as? DeviceInfoAPI else {
            print("Device does not support storage queries")
            return
        }

        device.requestQueryStorageInfo { success, error in
            guard success else {
                print("Storage query failed: \(error?.localizedDescription ?? "Unknown error")")
                return
            }

            guard let storage = device.storageInfo else {
                print("The device did not provide storage information")
                return
            }

            print("Used storage: \(storage.usedSpaceInMB) MB")
            print("Free storage: \(storage.freeSpaceInMB) MB")
        }
    }
}

Objective-C

#import <AIBuds/AIBuds.h>
#import <AIBuds/AIBuds-Swift.h>

@interface DeviceManager ()
@property (weak, nonatomic) id<AIBudsDeviceConvertible> device;
@end

@implementation DeviceManager

- (void)queryStorageInformation {
    id<AIBudsDeviceInfoAPI> device = (id<AIBudsDeviceInfoAPI>)self.device;
    if (![device conformsToProtocol:@protocol(AIBudsDeviceInfoAPI)]) {
        NSLog(@"Device does not support storage queries");
        return;
    }

    [device requestQueryStorageInfoWithCompletion:^(
        BOOL success,
        NSError * _Nullable error
    ) {
        if (!success) {
            NSLog(@"Storage query failed: %@",
                  error.localizedDescription ?: @"Unknown error");
            return;
        }

        AIBudsStorageInfoModel *storage = device.storageInfo;
        if (!storage) {
            NSLog(@"The device did not provide storage information");
            return;
        }

        NSLog(@"Used storage: %@ MB", storage.usedSpaceInMB);
        NSLog(@"Free storage: %@ MB", storage.freeSpaceInMB);
    }];
}

@end

Error Handling

1. Check success before reading the refreshed property.
2. Use error for failure details when the request does not succeed.
3. Handle a nil storageInfo value even after a successful callback.
4. Do not assume fixed error codes unless they are documented for the target device.

Best Practices

1. Read After Success: Access storageInfo only after the query completes successfully.
2. Keep the SDK Unit: Treat both values as megabytes; do not interpret them as bytes.
3. Check Protocol Conformance: Confirm that the device supports DeviceInfoAPI.
4. Update UI on the Main Queue: Dispatch completion-driven UIKit updates to the main queue.

Notes

• The completion handler reports request status; it does not contain a StorageInfoModel result.
• StorageInfoModel exposes only used and free space in megabytes.
• The SDK does not expose a separate total-capacity property in this model.
• Storage information can change while media is recorded, imported, or deleted.