Trait UICollectionViewDropPlaceholderContext 

pub unsafe trait UICollectionViewDropPlaceholderContext: UIDragAnimating + MainThreadOnly {
    // Provided methods
    fn dragItem(&self) -> Retained<UIDragItem>
       where Self: Sized + Message { ... }
    fn commitInsertionWithDataSourceUpdates(
        &self,
        data_source_updates: &DynBlock<dyn Fn(NonNull<NSIndexPath>) + '_>,
    ) -> bool
       where Self: Sized + Message { ... }
    fn deletePlaceholder(&self) -> bool
       where Self: Sized + Message { ... }
    fn setNeedsCellUpdate(&self)
       where Self: Sized + Message { ... }
}

Available on crate features UICollectionView and UIDragInteraction only.

Apple’s documentation

Provided Methods

fn dragItem(&self) -> Retained<UIDragItem>

where Self: Sized + Message,

Available on crate feature UIDragItem only.

fn commitInsertionWithDataSourceUpdates( &self, data_source_updates: &DynBlock<dyn Fn(NonNull<NSIndexPath>) + '_>, ) -> bool

where Self: Sized + Message,

Available on crate feature block2 only.

fn deletePlaceholder(&self) -> bool

where Self: Sized + Message,

fn setNeedsCellUpdate(&self)

where Self: Sized + Message,

Trait Implementations

impl<T> ImplementedBy<T> for dyn UICollectionViewDropPlaceholderContext

where T: ?Sized + Message + UICollectionViewDropPlaceholderContext,

impl ProtocolType for dyn UICollectionViewDropPlaceholderContext

const NAME: &'static str = "UICollectionViewDropPlaceholderContext"

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

fn protocol() -> Option<&'static AnyProtocol>

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

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T> UICollectionViewDropPlaceholderContext for ProtocolObject<T>

where T: ?Sized + UICollectionViewDropPlaceholderContext,

Implementors