Struct BADownloadManager 

pub struct BADownloadManager { /* private fields */ }

Available on crate feature BADownloadManager only.

Apple’s documentation

Implementations

impl BADownloadManager

pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

pub unsafe fn new() -> Retained<Self>

pub unsafe fn sharedManager() -> Retained<BADownloadManager>

Gets the singleton downloader object.

pub unsafe fn delegate( &self, ) -> Option<Retained<ProtocolObject<dyn BADownloadManagerDelegate>>>

A object confroming to BADownloadManagerDelegate to get notified when actions occur.

pub unsafe fn setDelegate( &self, delegate: Option<&ProtocolObject<dyn BADownloadManagerDelegate>>, )

Setter for delegate.

This is a weak property.

pub unsafe fn fetchCurrentDownloads( &self, ) -> Result<Retained<NSArray<BADownload>>, Retained<NSError>>

Available on crate feature BADownload only.

Fetches current downloads.

Fetches the current list of scheduled or in-flight downloads queued by your application or extension.

Parameter error: An error representing why the downloads could not be fetched.

Returns: On success, returns a list of scheduled or in-flight downloads. On failure, returns nil and sets error. Warning: This method can block and should not be called from the main thread.

See also: BADownloadManager:fetchCurrentDownloadsWithCompletionHandler

pub unsafe fn fetchCurrentDownloadsWithCompletionHandler( &self, completion_handler: &DynBlock<dyn Fn(NonNull<NSArray<BADownload>>, *mut NSError)>, )

Available on crate features BADownload and block2 only.

Fetches current downloads.

Fetches the current list of scheduled or in-flight downloads queued by your application or extension.

Parameter completionHandler: A block to recieve the currently scheduled or in-flight downloads. The block is called on the same queue as all the other completion blocks in the class.

Safety

completion_handler block must be sendable.

pub unsafe fn scheduleDownload_error( &self, download: &BADownload, ) -> Result<(), Retained<NSError>>

Available on crate feature BADownload only.

Schedules a background download.

Specifies a download to schedule at a given priority. The download will automatically start at the discretion of the system.

Parameter download: A BADownload object representing a URL to be downloaded.

Parameter error: A NSError representing why the BADownload could not be scheduled.

Returns: YES if downloadwas scheduled. NO and errorset if the download could not be scheduled.

pub unsafe fn performWithExclusiveControl( &self, perform_handler: &DynBlock<dyn Fn(Bool, *mut NSError)>, )

Available on crate feature block2 only.

Acquires exclusive access to the BADownloadManager across the app and application extension.

Acquires exclusive access to the BADownloadManager across the app and application extension. This ensures that your extension and app do not perform operations at the same time. Both the extension and app must use this API to ensure exclusive access.

Parameter performHandler: A block that will be executed once exclusive control is acquired. If an error is non-nil then a problem occurred acquiring exclusive access.

Safety

perform_handler block must be sendable.

pub unsafe fn performWithExclusiveControlBeforeDate_performHandler( &self, date: &NSDate, perform_handler: &DynBlock<dyn Fn(Bool, *mut NSError)>, )

Available on crate feature block2 only.

Acquires exclusive access to the BADownloadManager across the app and application extension.

Acquires exclusive access to the BADownloadManager across the app and application extension. This ensures that your extension and app do not perform operations at the same time. Both the extension and app must use this API to ensure exclusive access.

Parameter date: A date by which you want exclusive control acquired. If you pass +[NSDate date], control will attempt to be acquired and if it can not be, it will fail instantly.

Parameter performHandler: A block that will be executed once exclusive control is acquired. If an error is non-nil then a problem occurred acquiring exclusive access.

Safety

perform_handler block must be sendable.

pub unsafe fn startForegroundDownload_error( &self, download: &BADownload, ) -> Result<(), Retained<NSError>>

Available on crate feature BADownload only.

Attempts to schedule a BADownload in foreground mode.

Attempts to schedule a BADownload in foreground mode. This download will start (if it has not been started) immediately regrardlesss of battery or network status. The download will remain in this foreground until the download manager is disconnected. This API only functions if the download manager is created in the application and not the download extension. If this API is called from the download extension, NO will be returned along with a NSError with the settings BAErrorDomain : BAErrorCodeCallFromExtensionNotAllowed. If this API is called from a app while it is in the background, NO will be returned along with a NSError with the settings BAErrorDomain : BAErrorCodeCallFromInactiveProcessNotAllowed.

pub unsafe fn cancelDownload_error( &self, download: &BADownload, ) -> Result<(), Retained<NSError>>

Available on crate feature BADownload only.

Cancels a download.

Attempts to cancel a BADownload. If the download has not been schduled or has already completed, NO is returned along with a NSError set to BAErrorDomain : BAErrorCodeDownloadNotScheduled.

Returns: YES if the download is canceled. NO if the download could not be canceled, errorwill be set with a reason why.

Methods from Deref<Target = NSObject>

pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>

pub fn class(&self) -> &'static AnyClass

Dynamically find the class of this object.

Panics

May panic if the object is invalid (which may be the case for objects returned from unavailable init/new methods).

Example

Check that an instance of NSObject has the precise class NSObject.

use objc2::ClassType;
use objc2::runtime::NSObject;

let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());

pub unsafe fn get_ivar<T>(&self, name: &str) -> &T

where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Use Ivar::load instead.

Safety

The object must have an instance variable with the given name, and it must be of type T.

See Ivar::load_ptr for details surrounding this.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: DowncastTarget,

Attempt to downcast the object to a class of type T.

This is the reference-variant. Use Retained::downcast if you want to convert a retained object to another type.

Mutable classes

Some classes have immutable and mutable variants, such as NSString and NSMutableString.

When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.

So using this method to convert a NSString to a NSMutableString, while not unsound, is generally frowned upon unless you created the string yourself, or the API explicitly documents the string to be mutable.

See Apple’s documentation on mutability and on isKindOfClass: for more details.

Generic classes

Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.

You can, however, safely downcast to generic collections where all the type-parameters are AnyObject.

Panics

This works internally by calling isKindOfClass:. That means that the object must have the instance method of that name, and an exception will be thrown (if CoreFoundation is linked) or the process will abort if that is not the case. In the vast majority of cases, you don’t need to worry about this, since both root objects NSObject and NSProxy implement this method.

Examples

Cast an NSString back and forth from NSObject.

use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};

let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();

Try (and fail) to cast an NSObject to an NSString.

use objc2_foundation::{NSObject, NSString};

let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());

Try to cast to an array of strings.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();

This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.

Downcast when processing each element instead.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);

for elem in arr {
    if let Some(data) = elem.downcast_ref::<NSString>() {
        // handle `data`
    }
}

Trait Implementations

impl AsRef<AnyObject> for BADownloadManager

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<BADownloadManager> for BADownloadManager

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSObject> for BADownloadManager

fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for BADownloadManager

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for BADownloadManager

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl ClassType for BADownloadManager

const NAME: &'static str = "BADownloadManager"

The name of the Objective-C class that this type represents.

type Super = NSObject

The superclass of this class.

type ThreadKind = <<BADownloadManager as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread.

fn class() -> &'static AnyClass

Get a reference to the Objective-C class that this type represents.

fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.

impl Debug for BADownloadManager

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for BADownloadManager

type Target = NSObject

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for BADownloadManager

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for BADownloadManager

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl NSObjectProtocol for BADownloadManager

fn isEqual(&self, other: Option<&AnyObject>) -> bool

where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object.

fn hash(&self) -> usize

where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure.

fn isKindOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of the class, or one of its subclasses.

fn is_kind_of<T>(&self) -> bool

where T: ClassType, Self: Sized + Message,

👎Deprecated: use isKindOfClass directly, or cast your objects with AnyObject::downcast_ref

Check if the object is an instance of the class type, or one of its subclasses.

fn isMemberOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses.

fn respondsToSelector(&self, aSelector: Sel) -> bool

where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector.

fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool

where Self: Sized + Message,

Check whether the object conforms to a given protocol.

fn description(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object.

fn debugDescription(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object to use when debugging.

fn isProxy(&self) -> bool

where Self: Sized + Message,

Check whether the receiver is a subclass of the NSProxy root class instead of the usual NSObject.

fn retainCount(&self) -> usize

where Self: Sized + Message,

The reference count of the object.

impl PartialEq for BADownloadManager

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefEncode for BADownloadManager

const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF

The Objective-C type-encoding for a reference of this type.

impl DowncastTarget for BADownloadManager

impl Eq for BADownloadManager